WO2022124070A1 - 検査装置、情報処理方法およびプログラム - Google Patents
検査装置、情報処理方法およびプログラム Download PDFInfo
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- WO2022124070A1 WO2022124070A1 PCT/JP2021/042942 JP2021042942W WO2022124070A1 WO 2022124070 A1 WO2022124070 A1 WO 2022124070A1 JP 2021042942 W JP2021042942 W JP 2021042942W WO 2022124070 A1 WO2022124070 A1 WO 2022124070A1
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Definitions
- the present invention relates to an inspection device, an information processing method and a program.
- Patent Document 1 Conventionally, various devices for inspecting an inspected object by irradiating the inspected object with light have been proposed (see, for example, Patent Document 1).
- a small sample testing device that can easily test a sample such as blood is suitable for POCT (point of care testing) that tests in a place where a patient is present, such as a clinic, and its use is expanding.
- POCT point of care testing
- the sample container into which the sample is introduced is loaded into the chip, and the chip is rotated to centrifuge any component (for example, plasma) contained in the sample. Then, the separated components are reacted with the test reagent in the chip, and the test is performed by optically measuring the absorbance of the obtained reaction product.
- any component for example, plasma
- sample testing device in order to reliably perform the sample test, whether or not the sample is introduced into the sample container loaded in the chip (presence or absence of the sample) and the amount of the sample introduced into the sample container are inspected. It is necessary to judge whether or not only the required amount is present (sample introduction amount) before measuring the absorbance. Information regarding the presence or absence of a sample and the amount of sample introduced is also referred to as object information here. Since the chip used differs depending on the inspection item of the sample (because the inspection reagent differs depending on the chip used), it is desirable to be able to stably acquire the object information for each chip used. However, in the conventional sample inspection device, the study for stably acquiring the object information for each chip used has been insufficient.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide an inspection device, an information processing method, and a program capable of stably acquiring object information for each chip used. To do.
- the inspection device is a chip in which at least one light source that can be lit at different positions, a light source control unit that controls lighting of the at least one light source, and a storage container for accommodating an inspection object are loaded.
- the chip located in the illumination area illuminated by the lighting of the at least one light source by the rotation mechanism for rotating the light source is photographed at different timings for each of the different positions of the lighting light source.
- An imaging unit that acquires a plurality of individual images, an image generation unit that generates an image for analysis based on the plurality of individual images, and a state of the inspection object or the storage container based on the image for analysis.
- the luminance value of each pixel of the analysis image is calculated by using the luminance value of the pixel at the same position among the plurality of individual images.
- the information processing method includes a step of rotating a chip in which a storage container for accommodating an inspection object is loaded to be positioned in a lighting area, and lighting of at least one light source in the lighting area.
- the steps of emitting light toward the located chip, the process of photographing the chip illuminated by the light source to acquire an individual image, and the position of the chip at the time of photographing after the image of the chip are defined.
- the step of turning on at least one light source at another position to emit light toward the chip located in the illumination area, and taking a picture of the chip illuminated by the light source at the other position are taken separately.
- the brightness value of each pixel of the analysis image is calculated by using the brightness value of the pixel at the same position among the plurality of individual images.
- the program according to still another aspect of the present invention is a program for causing a computer to execute the above information processing method.
- object information can be stably acquired for each chip used.
- FIG. 1 It is sectional drawing which shows the internal structure of the sample inspection apparatus which concerns on one Embodiment of this invention. It is an enlarged front view which shows the sample container and a chip which are put into the said sample inspection apparatus. It is a perspective view when the lighting substrate arranged in the said measurement room is seen from the bottom. It is a block diagram which shows the hardware composition of the said sample inspection apparatus. It is a flowchart which shows the flow of operation by the acquisition method of the object information in the said sample inspection apparatus. It is explanatory drawing which shows typically a plurality of individual images acquired by the said sample inspection apparatus. It is explanatory drawing which shows schematically the image for analysis generated based on the said plurality of individual images.
- It is explanatory drawing which shows typically the relationship between the object information acquired by taking a picture of the said chip in two steps, and the judgment result of the state of a sample, or the state of a sample container. It is explanatory drawing which shows the model of the said 1st window part analysis image and the other 2nd window part analysis image. It is a top view which shows the measuring part of the said chip enlarged. It is explanatory drawing which shows the distribution of the difference of the luminance value acquired when the measuring part of the said chip has a ripple structure. It is explanatory drawing which shows the distribution of the difference of the luminance value acquired when the said measuring part does not have a ripple structure. It is explanatory drawing which shows the arbitrary individual image of the said measuring part. It is a block diagram schematically showing other configurations of the said sample inspection apparatus.
- FIG. 1 is a cross-sectional view showing an internal configuration of a sample inspection device 1 which is an example of the inspection device of the present embodiment.
- the sample inspection device 1 has a measurement chamber 71 in the housing.
- the measurement chamber 71 accommodates the chip 6 loaded with the sample container 5, and performs various measurements on the sample in the chip 6.
- the chip 6 housed in the measuring chamber 71 is pressed and held on the first stage 83 by the holder 72.
- the sample container 5 is an example of a container for accommodating an inspection object, and is also called a capillary or a capillary tube.
- a sample collected from the subject is introduced into the sample container 5.
- the above-mentioned sample is an example of a test object to be tested by the sample test device 1, and is, for example, blood (also referred to as whole blood) or plasma.
- blood also referred to as whole blood
- plasma As a case where the sample is plasma, for example, it can be assumed that plasma already extracted from the blood by centrifugation is used as the sample.
- the chip 6 contains a test reagent corresponding to the test item in advance.
- the test items include Hb (hemoglobin) A1c, which is an index for determining diabetes, CRP (C-reactive protein) and hsCRP (high-sensitivity CRP), which are inflammation markers, and CysC (cystatin C), which is an index for renal function testing. , And so on.
- the start button (not shown) is pressed while the chip 6 is held on the first stage 83, the rotation of the chip 6 is started and any component (for example, plasma) contained in the sample is centrifuged.
- the centrifuged component reacts with the test reagent in the chip 6 to produce a reactant.
- the absorbance of the reaction product is measured by the measuring unit 76 (see FIG. 4), the measurement result is output on paper or the like.
- FIG. 2 is an enlarged front view showing the sample container 5 and the chip 6.
- a black marker 5a which is a guideline for the amount required for the inspection of the sample, is attached to the surface of the sample container 5.
- the required amount of sample depends on the type of sample to be tested. Therefore, the position where the marker 5a is attached in the sample container 5 also differs depending on the type of the sample.
- a user can introduce a required amount of a sample into the sample container 5 for each sample to be inspected by introducing the sample into the sample container 5 with the target of the marker 5a.
- the chip 6 is configured by attaching a cover to the base.
- the material of the base and cover is appropriately set for each chip 6 (test reagent) in consideration of chemical resistance, water repellency in the internal flow path (sample fluidity), heat shrinkage during processing, etc. ing.
- the chip 6 whose inspection item is HbA1c is made of polypropylene resin (milky white) for both the base and the cover.
- the polystyrene resin contains carbon black to form a base (black), and the polystyrene resin is coated with fluorine to form a cover (transparent).
- Such a chip 6 has a container accommodating unit 61, a measured unit 62, a measuring unit 63, and a label 64.
- the sample container 5 is inserted and stored in the container storage unit 61.
- the container storage portion 61 is formed in a shape slightly larger than the outer shape of the sample container 5.
- a microchannel (not shown) is formed inside the chip 6, and the sample in the sample container 5 housed in the container accommodating portion 61 is placed in the microchannel due to the centrifugal force during rotation of the chip 6.
- a reagent storage unit (not shown) is provided in the middle of the micro flow path, and the centrifugally separated component of the sample flowing in the micro flow path reacts with the test reagent stored in the reagent storage unit. do.
- the reaction product flows toward the measured unit 62 by the centrifugal force, and the absorbance of the reaction product is measured by the measuring unit 76 in the measured unit 62.
- the measuring unit 63 is provided at a position where the sample in the sample container 5 flows through the microchannel and reaches it by the rotation of the chip 6 after a predetermined time (for example, 5 minutes) has elapsed from the start of measurement, and the measuring unit 63 is a window unit for sample detection. Is. More specifically, the measuring unit 63 is placed in a flow path in which when the rotation mechanism 80 (see FIG. 4), which will be described later, rotates the chip 6, a sample other than the required amount among the samples in the sample container 5 flows as waste liquid. To position.
- a predetermined time for example, 5 minutes
- the sensor unit By optically detecting the presence or absence of the sample that has reached the measuring unit 63 by the sensor unit (not shown) of the apparatus, it is possible to determine the presence or absence of the sample and the amount of the sample introduced into the sample container 5. .. For example, when the sensor unit cannot detect the sample (waste liquid) in the measuring unit 63 5 minutes after the start of measurement, the required amount of the sample has not been introduced into the sample container 5, or the sample has been introduced from the beginning. It can be judged that there is no such thing. However, the viscosity of the reaction product differs for each chip 6 (test item), the color of the reaction product differs depending on the type of sample (whole blood, plasma), and the color of the plasma product differs depending on the person. It is difficult to stably acquire information such as the presence or absence of a sample for all the chips 6 because the plasma is different for each sample. Therefore, in the present embodiment, information such as the presence or absence of a sample is stably acquired by the method described later.
- the label 64 is attached to the surface of the chip 6 and has a two-dimensional code 64a.
- the two-dimensional code 64a is identification information for identifying the above-mentioned four test items of the sample as a test object.
- a test reagent corresponding to the test item indicated by the identification information of the two-dimensional code 64a is housed.
- the two-dimensional code 64a is read by the image pickup unit 74. As a result, based on the identification information indicated by the read two-dimensional code 64a, the apparatus side determines which of the four inspection items the chip 6 housed in the sample inspection apparatus 1 is the inspection chip. Can be judged by.
- the label 64 may include information other than the above identification information (for example, information such as the serial number of the chip 6, the date of manufacture, and the manufacturer name).
- an image pickup unit 74 for reading the two-dimensional code 64a of the chip 6 is provided in the upper part of the measurement chamber 71.
- the image pickup unit 74 is composed of, for example, a camera that acquires a color image by shooting.
- the image pickup unit 74 is held in the upper part of the measurement chamber 71 by the holding unit 75.
- the sample inspection device 1 further has a measurement unit 76 (see FIG. 4).
- the measuring unit 76 optically measures the absorbance of the reaction product that has flowed through the microchannel in the chip 6 and reached the measured unit 62, and based on the rate of increase in the absorbance, a test item (for example, for example) included in the sample. CRP) concentration is calculated.
- a rotary table 81 is provided in the measurement chamber 71.
- the rotary table 81 is rotated about the rotary shaft AX by the motor 82.
- a first stage 83 and a second stage are provided on the rotary table 81.
- the first stage 83 and the second stage are arranged at positions that are point-symmetrical with respect to the rotation axis AX when viewed from the rotation axis AX direction.
- the above-mentioned chip 6 is set in the first stage 83.
- a balancer chip for balancing with the chip 6 is set in the second stage.
- the first stage 83 and the second stage are connected to a driving force switching mechanism 85 having a gear and a cam.
- the driving force switching mechanism 85 switches the transmission of the driving force of the motor 82 to the first stage 83 and the second stage.
- the rotation / non-rotation of the first stage 83 and the second stage is switched, and the direction of the centrifugal force acting on the chip 6 when the rotary table 81 is rotated is switched.
- the flow direction of the sample can be controlled in the chip 6.
- the above-mentioned first stage 83 rotates (rotates) around the first planet shaft portion 86 attached to the rotary table 81.
- the first planetary shaft portion 86 is located radially away from the rotary shaft AX of the rotary table 81 and is located parallel to the rotary shaft AX. Therefore, the first stage 83 can rotate around the first planetary axis portion 86 and revolve around the rotation axis AX.
- the second stage rotates (rotates) around the second planetary shaft portion (not shown) attached to the rotary table 81.
- the second planetary shaft portion is located on the side opposite to the first planetary shaft portion 86 with respect to the rotary shaft portion AX of the rotary table 81, and is located parallel to the rotary shaft portion AX. Therefore, the second stage can rotate around the second planetary axis portion and revolve around the rotation axis AX.
- FIG. 3 is a perspective view of the lighting substrate 91 when viewed from below.
- the lighting substrate 91 is formed with a substantially square opening 91a in a plan view.
- the imaging unit 74 photographs the label 64 of the chip 6 through the opening 91a of the lighting substrate 91 and reads the two-dimensional code 64a. As will be described later, when the sample container 5 housed in the chip 6 is photographed and an image is acquired, the imaging unit 74 photographs the sample container 5 through the opening 91a.
- a plurality of light sources 92 are attached to the lower surface 91b of the lighting substrate 91 at different positions from each other.
- a total of 12 light sources 92 are attached to the lighting substrate 91, three along the four sides of the opening 91a, but the number of light sources 92 is not limited to the above twelve.
- Each light source 92 is, for example, a red LED that emits red light, but may be an LED that emits light having a wavelength other than red.
- Each light source 92 illuminates the label 64 by emitting light toward the label 64 of the chip 6 mounted on the first stage 83 (see FIG. 1).
- the image pickup unit 74 can photograph the label 64 under an appropriate brightness and appropriately read the two-dimensional code 64a.
- the area illuminated by the emission of light from each light source 92 is referred to as an illumination area LA here.
- the chip 6 is rotated by the motor 82 so that the label 64 is located in the illumination region LA, and the two-dimensional code 64a of the label 64 located in the illumination region LA is read by the image pickup unit 74.
- the number of light sources 92 may be one.
- one light source 92 may be moved by a drive unit (for example, a motor) to be arranged at different positions, and the light source 92 may be turned on at each position.
- a drive unit for example, a motor
- object information Information regarding the condition of the inspection object or the container for the inspection object is also referred to as "object information" here.
- object information information such as the presence or absence of a sample in the sample container 5, whether or not a required amount of sample is introduced in the sample container 5, and whether or not the sample container 5 itself is housed in the chip 6 is information on the object.
- the image data (pixel value) of each pixel constituting the image captured and acquired by the image pickup unit 74 is also referred to as “luminance value” here.
- the luminance value can be, for example, a value of 0 (dark) to 255 (bright) with 8 bits.
- the sample inspection device 1 is originally provided with a plurality of light sources 92 and an image pickup unit 74 for reading the label 64 of the chip 6. Therefore, by using the plurality of light sources 92 and the imaging unit 74 to directly photograph the sample container 5 housed in the chip 6 and acquire an image, it is possible to obtain object information based on the acquired image. It is thought that it can be done. For example, when the sample is blood, the blood part appears darker than the other parts (the luminance value is small) in the acquired image. Therefore, the presence or absence of blood and the amount thereof can be determined based on the brightness value of each pixel.
- the object information can be acquired based on the above image before the components contained in the sample are centrifuged, the sample that reaches the measuring unit 63 after a lapse of a predetermined time from the start of the centrifugation is detected.
- the object information can be acquired more quickly than the case where only the method of acquiring the object information is used.
- the object information can be acquired for all the chips 6 without considering the viscosity of the reaction product, the color of the reaction product, and the like. Therefore, it is considered that the object information can be quickly and stably acquired for all the chips 6.
- the amount of emitted light emitted from each light source 92 is reduced, and (2) the amount of emitted light is equal among the light sources 92.
- a diffuser plate is placed in the optical path between each light source 92 and the chip 6 (particularly the sample container 5).
- the object information is accurately acquired based on the image acquired by the imaging unit 74 taking the sample container 5 located in the illuminated area LA. Will be difficult.
- the method (2) above since high accuracy is required for fine adjustment of the amount of emitted light, it is not easy to reduce the luminance unevenness.
- the method (3) above it is necessary to secure a space for arranging the diffuser plate, so that there is a concern that the size of the device will be increased. In particular, in order to reduce the size of the device, it is difficult to install the diffuser plate itself in the design in which only a gap of about 2 mm can be secured directly under the lighting substrate 91.
- the above-mentioned luminance unevenness can occur similarly even in a configuration having only one light source 92 (a configuration in which one light source 92 is moved by a drive unit). That is, when one light source 92 movable by the drive unit is turned on at an arbitrary position and the sample container 5 is photographed by the image pickup unit 74, in the obtained image, a region having high brightness corresponding to the position of the light source 92 is obtained. Appears and uneven brightness occurs.
- the object information can be stably acquired for each chip 6 having different inspection items, and the brightness can be obtained by a simple method while avoiding the increase in size of the device.
- the unevenness is reduced so that the object information can be acquired accurately.
- FIG. 4 is a block diagram showing a hardware configuration of the sample inspection device 1.
- the sample inspection device 1 further includes a rotation mechanism 80 and a control unit 100 in addition to the above-mentioned configuration.
- the rotation mechanism 80 is a mechanism for rotating the chip 6, and includes an encoder 87 in addition to the motor 82 and the driving force transmission mechanism 85 described above.
- the encoder 87 is an example of a rotation position detecting unit that detects the rotation position of the motor 82 (driving unit).
- the control unit 100 is composed of, for example, a central processing unit called a CPU (Central Processing Unit), and includes a main control unit 101, a light source control unit 102, an image generation unit 103, and an information acquisition unit 104. Will be done.
- the main control unit 101 controls the operation of each unit of the sample inspection device 1.
- the light source control unit 102 controls the lighting of at least one light source 92.
- the light source control unit 102 lights the 12 light sources 92 one by one at different timings.
- the 12 light sources 92 are divided into 6 sets of 2 each, the light source control unit 102 turns on the light sources 92 of the same set at the same time, while the light sources 92 are turned on at different timings in each set. You may. Further, the number of light sources 92 in each set may be three, four, or six. Further, as described above, in the case of the configuration in which one light source 92 is moved to different positions by the drive unit, the light source control unit 102 may turn on the light source 92 at different timings for each different position of the light source 92. .. That is, the sample inspection device 1 of the present embodiment includes a light source control unit 102 that lights at least one light source 92 that can be turned on at different positions at different timings at different positions.
- the light source control unit 102 constantly lights one light source 92, and the drive unit moves the light source 92 in the lit state to different positions. You may do it.
- the image generation unit 103 generates an image for analysis based on an individual image captured and acquired by the image pickup unit 74 at different timings for each different position of the light source 92 to be lit.
- the information acquisition unit 104 acquires the above-mentioned object information based on the analysis image generated by the image generation unit 103.
- the sample inspection device 1 further includes a storage unit 93.
- the storage unit 93 is a memory that stores various information as well as the operation program of the control unit 100, and is configured to include a ROM (Read Only Memory), a RAM (Random Access Memory), a non-volatile memory, and the like. ..
- ROM Read Only Memory
- RAM Random Access Memory
- non-volatile memory and the like. ..
- the individual image acquired by the imaging unit 74, the analysis image generated by the image generation unit 103, and the object information acquired by the information acquisition unit 104 are stored in the storage unit 93, and are stored in the storage unit 93 as needed. Read from 93.
- FIG. 5 is a flowchart showing the flow of the method of acquiring the object information.
- the rotation mechanism 80 rotates the rotary table 81 and the first stage 83 to position the chip 6 in the illumination region LA of each light source 92. (S1).
- any one of the light sources 92 is turned on to emit light toward the chip 6 located in the illumination region LA (S2).
- the chip 6 illuminated by the light source 92 in S2 is photographed by the imaging unit 74 to acquire one individual image K1 (S3). Since the image pickup unit 74 originally has an angle of view set within the range in which the two-dimensional code 64a of the label 64 is read, only a part of the chip 6 (for example, the area surrounded by the broken line in FIG. 6) is set, not the entire chip 6. ) Is photographed to acquire the individual image K1.
- the light source 92 at a position different from the light source 92 lit in S2 is turned on at a timing different from the previously lit light source 92, and the chip located in the illumination region LA is turned on.
- Light is emitted toward No. 6 (S4).
- the chip 6 illuminated by another light source 92 in S4 is photographed by the imaging unit 74, and another individual image K2 is acquired (S5).
- FIG. 6 schematically shows 12 individual images K1 to K12 acquired for each lighting of the 12 light sources 92.
- the twelve light sources 92 are attached to different positions and illuminate the chip 6 from different directions.
- a blown-out area w (high-luminance area) peculiar to a point light source is generated corresponding to the position of each light source 92.
- the image generation unit 103 calculates a simple average of the luminance values for the pixels at the same position between the plurality of individual images K1 to K12, and obtains an analysis image MA composed of a set of pixels having the luminance values of the simple average.
- Generate (S7) FIG. 7 schematically shows the analysis image MA generated by the image generation unit 103.
- the information acquisition unit 104 acquires object information based on the luminance values of the pixels arranged in one preset line (A1-A2 direction in FIG. 7) in the analysis image MA generated in S7. do.
- the information acquisition unit 104 can determine the presence / absence of blood in the sample container 5 based on the presence / absence of pixels whose luminance value is equal to or less than the threshold value TH1 in the above 1 line, and can obtain information regarding the presence / absence of blood. It can be acquired as object information. Further, the information acquisition unit 104 can determine the amount of blood introduced into the sample container 5 by counting the number of pixels whose luminance value is equal to or less than the threshold value TH1 in the above one line of the analysis image MA. can.
- the information acquisition unit 104 determines whether or not the required amount of blood has been introduced into the sample container 5 by comparing the counted number of pixels with the number of pixels in the above-mentioned one line corresponding to the required amount. And information about the sample amount (blood amount) can be obtained as the object information.
- the information acquisition unit 104 determines whether or not there is plasma in the sample container 5 and whether or not a required amount of plasma has been introduced into the sample container 5 by the same method as described above. Can be done.
- the information acquisition unit 104 can also determine whether or not the sample container 5 is stored in the container storage unit 61 of the chip 6 by the same method as described above, and the information regarding the storage state of the sample container 5 can be used as object information. Can be obtained as.
- the light source 92 is turned on at each of the position before the movement of the light source 92 and the position after the movement (a position different from the position before the movement) (one).
- a plurality of individual images may be acquired by lighting the light sources 92 at different positions and at different timings).
- one light source 92 may be moved to a different position while being lit, and the imaging unit 74 may take a picture of the chip 6 at a different timing for each different position to acquire a plurality of individual images.
- the image generation unit 103 may generate the analysis image MA using a value (luminance value) slightly deviated from the simple average, or may use the median of the brightness value to generate the analysis image MA. May be generated.
- FIG. 8 is a graph in which the distribution of luminance values for pixels at arbitrary same positions among a plurality of individual images is normalized.
- the above-mentioned average luminance range is within the range of n ⁇ ⁇ in the graph of FIG. 8, where n is the average luminance value and ⁇ is the standard deviation.
- Each pixel of the analysis image MA may have a luminance value corresponding to a deviation value within the average luminance range.
- the sample inspection device 1 of the present embodiment captures the chip 6 located in the illumination region LA illuminated by the lighting of at least one light source 92 at different timings for each different position of the lighting light source 92. Then, the image pickup unit 74 that acquires a plurality of individual images K1 to K12, the image generation unit 103 that generates the image MA for analysis based on the plurality of individual images K1 to K12, and the target based on the image MA for analysis. An information acquisition unit 104 for acquiring object information is provided.
- the information processing method of the present embodiment includes a step (S1) of rotating the chip 6 (by the rotation mechanism 80) to position it in the illumination region LA, and lighting of at least one light source 92 (by the light source control unit 102).
- at least one light source 92 is turned on at a position different from the position at the time of shooting of the chip 6, and light is emitted toward the chip 6 located in the illumination region LA.
- step (S4) a step (S5) of acquiring another individual image (for example, individual image K2) by photographing the chip 6 illuminated by the light source 92 at another position (the imaging unit 74), and (image).
- the viscosity of the reaction product of any component in the sample and the test reagent is obtained. It is possible to stably acquire object information based on the analysis image MA for any chip 6 without being affected by such factors.
- the image pickup unit 74 acquires a plurality of individual images K1 to K12 by photographing the container storage unit 61 of the chip 6 located in the illumination region LA by the rotation mechanism 80.
- object information information on whether or not the sample container 5 is loaded in the container storage unit 61 and whether or not there is a sample in the sample container 5 housed in the container storage unit 61 can be quickly obtained (for example, within a few seconds from the start of measurement). ) Can be obtained.
- the luminance value of each pixel of the analysis image MA is calculated using the luminance value of the pixel at the same position between the plurality of individual images K1 to K12, as described above, the plurality of individual images K1 to K12.
- a value obtained by simply averaging the luminance values between the pixels at the same position, a value within the average luminance range, or the like can be used as the luminance value of each pixel of the image MA for analysis.
- the analysis image MA corresponds to the overexposure region w of the individual images K1 to K12.
- the information acquisition unit 104 can accurately acquire the object information based on the analysis image MA. Further, in order to reduce the luminance unevenness, it is not necessary to arrange another member such as a diffuser plate in the optical path between the light source 92 and the chip 6, and it is not necessary to finely adjust the amount of emitted light between the plurality of light sources 92. As a result, it is possible to accurately acquire the object information by reducing the luminance unevenness by a simple method while avoiding the increase in size of the device.
- the object information can be acquired without changing the structure of the chip 6, the burden on the subject at the time of blood collection is reduced without increasing the sample amount due to the change of the chip structure. can do.
- object information such as the presence or absence of a sample in a short time, usability can be improved.
- the sample inspection device 1 has a plurality of light sources 92. Then, the light source control unit 102 turns on the plurality of light sources 92 at different timings at different positions. In this case, as compared with the configuration in which one light source 92 is moved to a different position depending on the drive unit and the chip 6 is illuminated from different positions, it is not necessary to secure a space for arranging the drive unit. Can contribute. Further, the control of the drive unit becomes unnecessary.
- each pixel of the analysis image MA has a luminance value within the average luminance range
- each of the above pixels has an average luminance value or an average luminance value between the pixels at the same positions of the individual images K1 to K12. Since the value is close to, the luminance value of the region corresponding to the overexposure region w in the analysis image MA can be reliably shifted to the lower luminance side than the luminance value of the overexposure region w. As a result, it is possible to reliably generate an analysis image MA with reduced luminance unevenness.
- the above average luminance range is a range of luminance values within n- ⁇ or more and n + ⁇ or less in the normal distribution of luminance values for pixels at the same position. Any luminance value within the range of n ⁇ ⁇ can be tolerated as a value representing the average luminance even if it is not the average luminance value itself, and the effect of the above-described embodiment is used by using such a luminance value. Can be obtained.
- the information acquisition unit 104 acquires object information based on the luminance values of the pixels of one line (A1-A2 direction) set in advance in the analysis image MA (S8).
- the object information is based on the difference in the brightness value between them. It is possible to acquire the object information more easily than the method described later.
- the luminance value of each pixel of the analysis image MA is an average luminance value obtained by averaging the luminance values of the pixels at the same position between the plurality of individual images K1 to K12.
- the luminance value (high luminance value) of the overexposure region w generated due to the lighting of the light source 92 in each of the individual images K1 to K12 is replaced with the average luminance value in the analysis image MA, and as a result, the luminance value is certain.
- the whiteout area is surely inconspicuous. As a result, the information acquisition unit 104 can surely acquire the object information accurately based on the above-mentioned analysis image MA.
- the average luminance value is a simple average of the luminance values for the pixels at the same position between the plurality of individual images K1 to K12.
- the image generation unit 103 can easily generate the analysis image MA based on the plurality of individual images K1 to K12.
- the above average luminance value may be a weighted average.
- the average luminance value is a weighting obtained by averaging the luminance values of pixels at the same position between a plurality of individual images K1 to K12 by weighting them based on the position of the light source 92 or the amount of light emitted from the light source 92. It may be average.
- the above weight is set so that, for example, the light source 92 having a longer distance from the illumination region LA has a larger weight, and the light source 92 having a smaller amount of emitted light has a larger weight.
- the information acquisition unit 104 can accurately acquire the object information based on the above-mentioned analysis image MA.
- the test object is a sample
- the object information includes the presence / absence of loading of the storage container (sample container 5) in the chip 6, the presence / absence of the sample in the storage container, the type of sample (blood, plasma), and the storage. Contains information about at least one of the amount of sample introduced (sample amount) in the container.
- the information acquisition unit 104 can accurately acquire information such as the presence / absence of the storage container based on the analysis image MA in which the luminance unevenness is reduced.
- the sample inspection device 1 of this embodiment includes a measurement unit 76.
- the object information can be accurately acquired by the above-mentioned method.
- the analysis image MA shown in FIG. 7 is referred to as a first analysis image M1. That is, the analysis image MA generated by the image generation unit 103 with the sample housed in the sample container 5 is referred to as the first analysis image M1.
- FIG. 9 shows an analysis image MA generated by the image generation unit 103 in a state where the sample is not stored in the sample container 5.
- the analysis image MA of FIG. 9 is referred to as a second analysis image M2 in order to distinguish it from the first analysis image M1 of FIG. 7.
- the information acquisition unit 104 acquires the object information based on the difference in the luminance value between the pixels at the same position of the first analysis image M1 and the second analysis image M2.
- FIG. 10 schematically shows the distribution of the difference in luminance value between the first analysis image M1 and the second analysis image M2 in each pixel on one line (A1-A2 direction) of FIGS. 7 and 9. Is shown.
- the distribution in FIG. 10 is the distribution obtained when the sample contained in the sample container 5 is blood. Further, here, for convenience of explanation, the presence of the marker 5a attached to the surface of the sample container 5 is ignored.
- each light source 92 There is light source unevenness in each light source 92.
- the light source unevenness for example, radiation unevenness (unevenness of radiation angle) between each light source 92, mounting unevenness (unevenness of mounting angle with respect to the lighting board 91 between each light source 92), and the like can be considered.
- the light source unevenness may hinder the information acquisition unit 104 from accurately acquiring the object information based on the analysis image MA.
- the image generation unit 103 When the image generation unit 103 generates a first analysis image M1 showing an image with a sample and a second analysis image M2 showing an image without a sample as the image MA for analysis, the influence of the above-mentioned light source unevenness. Is reflected in both the first analysis image M1 and the second analysis image M2. Therefore, by taking the difference in the luminance values between the pixels at the same positions of the first analysis image M1 and the second analysis image M2, the influence of the light source unevenness is canceled or reduced. As a result, even in a state where light source unevenness exists, the information acquisition unit 104 can accurately acquire object information based on the difference in the luminance values, and can guarantee stable information acquisition performance. can.
- FIG. 11 shows the case where the sample is plasma, between the first analysis image M1 and the second analysis image M2 in each pixel on one predetermined line (A1-A2 direction).
- the distribution of the difference in brightness values is schematically shown. Also in FIG. 11, for convenience of explanation, the presence of the marker 5a attached to the surface of the sample container 5 is ignored.
- the inspection object is a nearly transparent liquid such as plasma
- the light incident from the light source 92 is refracted at the end portion (end face) of the plasma in the sample container 5 (so-called lens effect). Therefore, in the analysis image MA, the luminance value becomes high at the position of the pixel corresponding to the end portion of plasma.
- the information acquisition unit 104 can accurately recognize the length L corresponding to, for example, the amount of plasma introduced into the sample container 5 based on the difference in the luminance values. Become. That is, the method of acquiring the object information based on the difference in the luminance values is very effective especially when the sample is a transparent or near-transparent liquid.
- the above-mentioned first analysis image M1 and second analysis image M2 are generated by, for example, the following method.
- the image pickup unit 74 photographs the chip 6 at different timings at different positions of the light source 92 to be lit before the chip 6 is rotated by the rotation mechanism 80, and acquires a plurality of first individual images.
- the chip 6 is loaded with the sample container 5 containing the sample.
- the image pickup unit 74 photographs the chip 6 at different timings at different positions of the light source 92 to be lit, and acquires a plurality of second individual images. Since the sample contained in the sample container 5 flows into the microchannel in the chip 6 due to the centrifugal force generated by the rotation of the chip 6, the sample container 5 is in a state without a sample.
- the image generation unit 103 generates the first analysis image M1 based on the plurality of first individual images, and generates the second analysis image M2 based on the plurality of second individual images. For example, the image generation unit 103 generates a first analysis image M1 composed of a set of the simple average pixels by calculating a simple average of the luminance values of the pixels at the same position among the plurality of first individual images. be able to. Similarly, the image generation unit 103 generates a second analysis image M2 composed of a set of the simple average pixels by calculating a simple average of the luminance values of the pixels at the same position among the plurality of second individual images. can do.
- the light source 92 has uneven light intensity in which the amount of emitted light decreases due to aging.
- the time lag when the imaging unit 74 captures the chip 6 and acquires the plurality of first individual images and the plurality of second individual images is sufficiently shorter than the span of performance deterioration due to the aging of the light source 92. Therefore, after acquiring the plurality of first individual images, the imaging unit 74 can acquire the plurality of second individual images in a state where the influence of the light amount unevenness due to the secular variation of the light source 92 is reduced. Then, after the generation of the first analysis image M1, the image generation unit 103 can generate the second analysis image M2 based on the plurality of second individual images in which the influence of the light amount unevenness is reduced. As a result, the information acquisition unit 104 can acquire the object information more accurately based on the first analysis image M1 and the second analysis image M2, and reliably guarantees stable information acquisition performance. Is possible.
- the plurality of first individual images and the plurality of second individual images are images acquired by photographing the same sample container 5, and the first analysis image M1 and the second analysis image M2 are the same. It is an image generated about the sample container 5. Therefore, for example, even if there is a scratch on the surface of the sample container 5, the information acquisition unit 104 is based on the difference in the brightness value between the pixels at the same position of the first analysis image M1 and the second analysis image M2. By acquiring the object information, it is possible to acquire the object information in a state where the influence of the scratch on the surface of the sample container 5 is cancelled. Therefore, also in this respect, the information acquisition unit 104 can acquire the object information with high accuracy.
- the above-mentioned second analysis image M2 (luminance value of each pixel) generated by the image generation unit 103, that is, the second analysis image M2 for the chip 6 without a sample is stored in advance by default in the storage unit 93 (FIG. 4). It may be stored in (see). Then, when the first analysis image M1 is generated by the image generation unit 103, the information acquisition unit 104 reads out the second analysis image M2 from the storage unit 93, and reads out the generated first analysis image M1. The object information may be acquired based on the difference in the brightness value between the pixels at the same position in the second analysis image M2.
- the step of acquiring the plurality of second individual images after the imaging unit 74 acquires the plurality of first individual images, and the image generation unit 103 It is possible to omit the step of generating the second analysis image M2 based on the plurality of second individual images.
- the information acquisition unit 104 can quickly acquire the object information based on the first analysis image M1 and the second analysis image M2.
- FIG. 12 schematically shows a part of the above-mentioned first analysis image M1 and second analysis image M2 acquired before and after the rotation of the chip 6.
- the image 5a1 of the black marker 5a attached to the sample container 5 is also included in the first analysis image M1 and the second analysis image M2.
- the position of the image 5a1 is deviated by the distance AH in the direction of one line (A1-A2 direction). This is because the sample container 5 housed in the container storage portion 61 of the chip 6 receives the centrifugal force due to the rotation of the chip 6 and moves inside the container storage portion 61 in the A2 direction by a distance AH.
- a region including one pixel line in the A1-A2 direction and a plurality of lines parallel to the one line is referred to as a specific region SR here.
- the width BW in the B direction of the specific region SR corresponds to the width of the sample container 5.
- the width is set to the number of pixels (for example, 33 pixels).
- the information acquisition unit 104 sets the luminance value (here, the luminance value within the average luminance range) for each position of each pixel on the one line in each of the first analysis image M1 and the second analysis image M2.
- the width direction average value further averaged among a plurality of pixels arranged in the B direction in the specific area SR is calculated. Then, the information acquisition unit 104 acquires the object information based on the difference in the average value in the width direction between the first analysis image M1 and the second analysis image M2.
- the information acquisition unit 104 acquires the object information based on the difference in the average value in the width direction, so that the object information can be obtained while suppressing the influence of the reflection unevenness in addition to the light source unevenness and the light amount unevenness described above. It can be acquired more accurately.
- FIG. 13 schematically shows the distribution of the difference between the average values in the width direction in the above one line.
- blood is assumed as a sample.
- the part without the sample the difference in the width direction average value is near zero
- the part with the sample the part where the difference in the width direction average value is negative. It can be seen that the way in which the difference in the mean values in the width direction changes is clearly different. Therefore, the information acquisition unit 104 can easily recognize the boundary portion between the presence / absence of the sample and the presence / absence of the sample based on the difference in the average value in the width direction, and can accurately acquire the information regarding the presence / absence of the sample.
- the singular points indicated by the above Q1, Q2, and Q3 correspond to the regions P1 of the first analysis image M1 and the regions P2 and P3 of the second analysis image M2 in FIG. 12, respectively.
- the region P1 is a region in which the image 5a1 of the marker 5a is located in the first analysis image M1.
- the region P2 is a region in which the image 5a1 of the marker 5a is located in the second analysis image M2.
- the region P3 is a region of the end portion of the sample container 5 that has entered the inside of the container accommodating portion 61 by rotation into the chip 6 in the second analysis image M2.
- FIG. 14 schematically shows the mechanism by which the singular points Q1 to Q3 are generated.
- the average value in the width direction of one line is the region where the image 5a1 of the black marker 5a is located. It decreases at P1 and slightly increases in the dark red region where the sample (blood) is present in the sample container 5.
- the average value in the width direction of one line is the region P2 in which the image 5a1 of the black marker 5a is located. Decreases with. Further, in the region P3 of the second analysis image M2, the milky white cover of the chip 6 and the sample container 5 are overlapped with each other to be slightly darkened, so that the average luminance value is lowered.
- the region P3 is a region in which the brightness value changes unstable because the light emitted from the light source 92 is refracted at the end of the sample container 5, and may or may not appear at the time of measurement.
- the image pickup unit 74 is originally provided for reading the two-dimensional code 64a of the label 64 attached to the surface of the chip 6, and is at a position suitable for reading the two-dimensional code 64a in the measuring chamber 71 (for example, 2). It is arranged at a position where the dimension code 64a is read from directly above). Therefore, when the sample container 5 located at the end of the chip 6 is photographed by the image pickup unit 74 arranged in this way, the sample container 5 is photographed in an oblique direction. Therefore, the influence of the aberration of the imaging unit 74 becomes large, and as shown in the enlarged view of the C unit of FIG. 15, in the first analysis image M1, the portion corresponding to the end face of the plasma has the high-luminance distortion D1 and the distortion D1. D2 appears.
- the high-luminance distortions D1 and D2 cause a large difference in the average value in the width direction, and may hinder the accurate acquisition of object information.
- the information acquisition unit 104 acquires the object information for the specific chip 6 (inspection item: hsCRP) as follows based on the first analysis image M1 and the second analysis image M2.
- FIG. 16 schematically shows the distribution of one line of the difference in the average value in the width direction between the first analysis image M1 and the second analysis image M2 obtained for the specific chip 6.
- the information acquisition unit 104 detects the large section E in the distribution shown in FIG. 16 and then extracts the small section G from the large section E.
- the large section E is a section defined based on a first threshold value (for example, +13) higher than the reference value (for example, 0) of the difference between the widthwise average values, and includes distortion of the end face in the distribution of the above one line. It corresponds to the section where the sample is considered to exist in the state.
- the information acquisition unit 104 starts from a point (for example, E1) in which the first threshold value is monotonically increased twice or more from one side (A1 side) to the other side (A2 side) on the above one line.
- the section up to the point (for example, point E2) that exceeds the first threshold value by monotonically increasing two or more times is detected as the large section E.
- the positions of the points E1 and E2 in the distribution of FIG. 16 correspond to the positions of e1 and e2 in the first analysis image M1 of FIG. 15, respectively.
- the small section G is a section defined in the large section E based on a second threshold value (for example, -8) lower than the reference value, and does not include end face distortion in the distribution of the one line. It corresponds to the section where the sample is considered to exist in the state.
- the information acquisition unit 104 starts from a point (for example, G1) where the first line is monotonically decreased twice or more from one side (A1 side) to the other side (A2 side). Of the points that exceed the second threshold value by monotonically increasing two or more times, the section up to the point closest to A2 (for example, point G2) is extracted as a small section G.
- the positions of the points G1 and G2 in the distribution of FIG. 16 correspond to the positions of g1 and g2 in the first analysis image M1 of FIG. 15, respectively.
- the information acquisition unit 104 determines the presence or absence of a sample by calculating the average of the difference between the average values in the width direction in the small section G in the one line direction and comparing it with the third threshold value (for example, -10). , Can be acquired as object information.
- the third threshold value for example, -10
- the distortions D1 and D2 caused by the aberration of the imaging unit 74 by extracting the small section G from the large section E in the distribution of one line of the difference in the mean values in the width direction. It is possible to exclude the region where the difference in the mean value in the width direction becomes large due to the influence. Therefore, by acquiring the object information based on the difference in the average value in the width direction in the small section G, the object information can be accurately acquired while the influence of the aberration of the imaging unit 74 is reduced. Therefore, when the sample container 5 has to be photographed under the condition that the aberration of the image pickup unit 74 is greatly affected by the configuration or design of the device, such as the sample container 5 is not located directly under the image pickup unit 74. Is very effective in the above-mentioned method of acquiring an object.
- the image pickup unit 74 may read in advance the two-dimensional code 64a (identification information) of the label 64 attached to the surface of the chip 6.
- the information acquisition unit 104 can determine the type (inspection item) of the chip 6 based on the two-dimensional code 64a.
- the information acquisition unit 104 can determine in advance whether or not the chip 6 to be used is a specific chip 6, and if it is a specific chip 6, the above-mentioned method is executed to execute the object. Information can be obtained.
- FIG. 17 schematically shows a composite analysis image MA-Co in which a plurality of analysis image MAs are superimposed at the same position on the chip 6.
- the analysis image MA for example, the analysis image MA described in (6-1. Method using the luminance value itself) can be used.
- the rotation mechanism 80 rotates the chip 6 by a predetermined angle and stands still.
- the image pickup unit 74 may repeatedly acquire a plurality of individual images K1 to K12 for a part of the chip 6 and the image generation unit 103 may repeatedly generate an analysis image MA for each different rotation position of the chip 6. ..
- a part of the chip 6 is photographed at two different rotation positions, and the analysis image MA generated at each rotation position is referred to as an analysis image MA-1 and an analysis image MA-2. do.
- the image generation unit 103 may superimpose a plurality of analysis images MA-1 and MA-2 at the same position on the chip 6 to generate a composite analysis image MA-Co.
- the different rotation positions of the chip 6 may be three or more, and the number of analysis image MAs may be three or more.
- the rotational position of the motor 82 and the photographing area of the chip 6 (the area defined by the coordinate system of FIG. 17) imaged by the imaging unit 74 are associated in advance.
- the image generation unit 103 can specify the photographing region of the chip 6 based on the rotation position.
- the plurality of analysis images MA-1 and MA-2 are generated by photographing a part of the chip 6, the plurality of analysis images MA-1 and MA-2 and the plurality of the chip 6 are present.
- the shooting area corresponds to one-to-one.
- the image generation unit 103 recognizes the same position of the chip 6 in the plurality of analysis images MA-1 and MA-2 by recognizing the same coordinate position included in each shooting area in the coordinate system of FIG. can do. Then, the image generation unit 103 can superimpose the plurality of analysis images MA-1 and MA-2 at the same position of the recognized chip 6.
- the information acquisition unit 104 can perform the same as the method described in (6-1. Method using the luminance value itself), for example. Object information can be acquired based on the composite analysis image MA-Co.
- the individual analysis images MA-1 and MA-2 are images showing the luminance values for a part of the chip 6 (for example, a part of the sample container 5), these analysis images MA-1 and MA-2 By synthesizing MA-2 so that the same positions of the chips 6 overlap, it is possible to obtain an image MA-Co for synthetic analysis having brightness values for all of the sample containers 5.
- the information acquisition unit 104 is an object for the entire sample container 5 based on the synthetic analysis image MA-Co.
- Information (for example, information on whether or not the sample is sufficiently contained in the sample container 5) can be acquired.
- the method for generating the composite analysis image MA-Co by superimposing a plurality of analysis image MAs acquired at different rotation positions of the chip 6 is the above-mentioned first analysis image M1 and second analysis image M2. Can also be applied when using.
- FIG. 18 schematically shows a temporal flow (sequence) when the chip 6 is photographed by the imaging unit 74 in two stages and the absorbance is measured (photometry).
- the image pickup unit 74 may acquire a plurality of individual images in each of the first period T1 and the second period T2.
- the details of the sequence will be described with reference to the configurations shown in FIGS. 1 to 4.
- the image pickup unit 74 acquires a plurality of individual images of the container storage unit 61 by photographing the container storage unit 61 of the chip 6 located in the illumination region LA by the rotation mechanism 80.
- the beginning of the first period T1 is, for example, t0 when the chip 6 is housed in the measurement chamber 71 and the start button instructing the start of measurement is pressed.
- the end of the first period T1 is the time point t3, for example, 15 seconds after the time point t0.
- the imaging unit 74 takes an image of the container accommodating unit 61, for example, at the time point t1 3 seconds after the time point t0.
- the rotation of the chip 6 by the rotation mechanism 80 is started, for example, between the time point t1 and the time point t2 described later (for example, 10 seconds after the time point t0).
- the sample contained in the sample container 5 is introduced into the microchannel of the chip 6.
- the elapsed time from each time point t1 to t3 starting from the time point t0 is not limited to the above numerical value, and can be set as appropriate.
- the imaging unit 74 photographs a plurality of individual measuring units 63 (windows for detecting an inspection object) of the chip 6 located in the illumination region LA by the rotation mechanism 80. Get an image.
- the second period T2 is a period later in time than the first period T1, and the beginning thereof is a time point t4 when, for example, 2 minutes have passed from the time point t0.
- the end of the second period T2 is the time point t7, for example, 6 minutes after the time point t0.
- the imaging unit 74 takes a picture of the weighing unit 63 at a time point t6, for example, 5 minutes after the time point t0.
- the absorbance is measured by the measuring unit 76. Specifically, the absorbance is measured by the measuring unit 76 at the time point t8 after, for example, 7.5 minutes have elapsed from the time point t0.
- the elapsed time from each time point t4 to t8 starting from the time point t0 is not limited to the above numerical value, and can be set as appropriate.
- the image generation unit 103 generates an image for analysis based on a plurality of acquired individual images in each of the first period T1 and the second period T2. Then, the information acquisition unit 104 acquires the object information based on the generated analysis image in each of the first period T1 and the second period T2.
- the method for generating the analysis image and acquiring the object information based on the analysis image is described in [6. Acquisition method of object information] is the same.
- the container accommodating part 61 by the image pickup unit 74 Shooting will be done at the same time.
- the rotation of the chip 6 has already started, and the sample has flowed from the sample container 5 into the inside of the chip 6. Therefore, the container is housed in the state where the sample does not exist in the sample container 5. Part 61 is photographed.
- the imaging unit 74 takes a picture of the measuring unit 63 at the time point t5, for example, 3 minutes after the time point t0.
- the sample flowing through the microchannel has not reached the measuring unit 63 due to the rotation of the chip 6, so that the measuring unit 63 is photographed without the sample. ..
- FIG. 19 shows the relationship between the object information acquired (detected) by photographing the two locations (container accommodating unit 61 and measuring unit 63) of the chip 6 and the determination result of the state of the sample or the state of the sample container 5. Is schematically shown. Note that the circles in the figure indicate the case where “with sample” is detected as the object information. Further, the x mark in the figure indicates the case where "no sample” is detected as the object information.
- the information acquisition unit 104 uses the sample container 5 as the container accommodating unit. It is determined that the container is normally inserted in 61. Further, when “without sample” is detected based on the image taken by the container accommodating unit 61 and “with sample” is detected based on the image taken by the measuring unit 63, the information acquisition unit 104 uses the sample container 5 as the container accommodating unit. It is determined that the container is inserted in the opposite direction to 61.
- the required amount of sample is contained in the sample container 5, but the sample container 5 is inserted into the container container 61 in the opposite direction. This is because the sample contained in the sample container 5 may be out of the imaging range of the imaging unit 74, and in that case, the detection result based on the imaging of the container container 61 is “no sample”. ..
- the information acquisition unit 104 determines the sample stored in the sample container 5. Judge that the amount is insufficient (the required amount of sample is not contained). This is because the waste liquid has not reached the measuring unit 63 even though the sample is contained in the sample container 5. Further, when “no sample” is detected based on the image taken by the container container 61 and “no sample” is detected based on the image taken by the measuring unit 63, the information acquisition unit 104 puts the sample in the sample container 5 from the beginning. Is not introduced (sample not introduced).
- the sample container 5 is hidden in the container container 61 until it is hidden by the upper surface of the chip 6. It may be plugged in.
- the imaging unit 74 cannot photograph the sample hidden on the upper surface of the chip 6, even if the required amount of the sample is contained in the sample container 5, it is based on the result of photographing the remaining sample that is not hidden. Therefore, there is a possibility that a misjudgment may occur if the sample amount is insufficient.
- the object information can be acquired in a state where the influence of the scratch is canceled by the above-mentioned (6-2. Method using the difference in luminance value).
- 6-2. Method using the difference in luminance value it may not be possible to cancel the effect of the scratch. Therefore, if the state of the sample or the state of the sample container 5 is determined based only on the imaging result of the container container 61, an erroneous determination due to the above scratches may occur.
- the state of the sample or the state of the sample container 5 is comprehensively determined based on the two object information acquired by photographing the container accommodating unit 61 and the measuring unit 63 in two stages as described above. do.
- the above-mentioned misjudgment regarding the state of the sample or the state of the sample container 5 can be eliminated as much as possible, and the accuracy of the judgment can be improved.
- the information acquisition unit 104 determines whether or not the required amount of sample is contained in the sample container 5 based on the two object information (acquired in two steps), and thus determines whether or not the sample amount is insufficient. The accuracy of can be improved.
- a blood cell separation portion is provided in the microchannel of the chip 6 described above.
- the blood cell separation section is a place where whole blood is contained in the sample container 5 as a sample, and when the whole blood is introduced into the microchannel by the rotation of the chip 6, the blood cells contained in the whole blood are collected by centrifugation.
- the test item is, for example, CRP
- plasma from which blood cells have been removed at the blood cell separation part further flows through the microchannel. Then, the plasma reacts with the test reagent to produce a reactant to be measured for absorbance.
- the measurement accuracy of the absorbance of the reactants may decrease. Therefore, in the present embodiment, it is determined whether or not blood cells are mixed in the plasma by the following method, thereby avoiding a decrease in the measurement accuracy of the absorbance.
- the sample (waste liquid) reaches the measuring unit 63 at the time point t6 when a predetermined time (for example, 5 minutes) has elapsed from the start of measurement (time point t0).
- the measuring unit 63 is located in the illumination region LA at the time point t5 before the predetermined time (for example, 5 minutes) elapses from the measurement start (time point t0). Stops the rotation of the chip 6.
- the imaging unit 74 photographs the measuring unit 63. That is, the imaging unit 74 photographs the measuring unit 63 before the sample reaches the measuring unit 63 due to the rotation of the chip 6.
- the light sources 92 are turned on at different timings at different positions of the 12 light sources 92, and the measuring unit 63 is photographed.
- the imaging unit 74 acquires a plurality of individual images of the measuring unit 63 as the first window unit individual image.
- the rotation mechanism 80 restarts the rotation of the chip 6 and rotates the chip 6 so that the measuring unit 63 is located in the illumination region LA at the time point t6 when the predetermined time has elapsed from the start of measurement (time point t0). Stop it.
- the imaging unit 74 photographs the measuring unit 63. That is, the imaging unit 74 takes an image of the measuring unit 63 after the sample reaches the measuring unit 63 by the rotation of the chip 6.
- the light sources 92 are turned on at different timings at different positions of the 12 light sources 92, and the measuring unit 63 is photographed.
- the imaging unit 74 acquires a plurality of individual images of the measuring unit 63 as the second window unit individual image.
- the image generation unit 103 generates the first window unit analysis image MA-a as the analysis image MA based on the plurality of first window unit individual images, and also generates the plurality of second window unit individual images. Based on the above, a second window portion analysis image MA-b as an analysis image MA is generated.
- the generation of the first window analysis image MA-a and the second window analysis image MA-b is described in the above-mentioned [6. It can be performed by the same method as [Method of acquiring object information]. As a result, [6. An effect similar to the effect described in [Method of acquiring object information] can be obtained.
- an image for analysis for analysis of the first window portion.
- the overexposure becomes inconspicuous, and it is possible to obtain an analysis image in which the luminance unevenness of the measuring unit 63 is reduced.
- FIG. 20 shows each model of the first window unit analysis image MA-a and the second window unit analysis image MA-b generated by the image generation unit 103.
- the sample is not present in the first window analysis image MA-a (analysis image model A). Since it is created based on a plurality of individual images taken in the state, the brightness value of each pixel corresponding to the position of the measuring unit 63 in the first window unit analysis image MA-a is close to 255. ..
- a virtual grain having a luminance value of 250 is considered as a plurality of pixels corresponding to the positions of the measuring unit 63 in the first window unit analysis image MA-a.
- the second window analysis image MA-b (analysis image model B) is created based on a plurality of individual images taken in the presence of a sample
- the second window analysis image MA-b is created. Then, all the above-mentioned virtual grains included in the first window analysis image MA-a are replaced with the grains representing the sample.
- the virtual grains contained in the first window analysis image MA-a are a grain representing plasma (the brightness value is, for example, 240) and a grain representing blood cells (the brightness value is, for example, 240).
- the luminance value is, for example, 40).
- the luminance values are shown in FIG.
- the information acquisition unit 104 determines the luminance of the pixels at the same position in the first window analysis image MA-a and the second window analysis image MA-b. By creating a distribution showing the relationship between the difference in values and the frequency, and determining whether or not there are a certain number of pixels with a threshold value of Th or more, it is determined whether or not blood cells are mixed in the plasma. be able to. That is, the information acquisition unit 104 is a sample based on the distribution of the difference in the brightness values of the pixels at the same position between the image MA-a for analysis of the first window unit and the image MA-b for analysis of the second window unit.
- a foreign substance for example, blood cells that should have been separated
- the sample for example, plasma
- the user can be urged to remeasure by causing the device to output an error (for example, a warning sound).
- FIG. 21 is an enlarged plan view showing the measuring unit 63 of the chip 6.
- the measuring unit 63 has a ripple structure 63a.
- the ripple structure 63a is a concentric uneven surface in the measuring unit 63 that comes into contact with a sample flowing through the flow path in the chip 6.
- the total reflection condition of the incident light on the surface of the ripple structure 63a changes depending on whether the sample is present or not in the flow path. For example, when the sample is not present in the flow path, the light incident on the ripple structure 63a from above is totally reflected by the surface of the ripple structure 63a and does not enter the flow path. On the other hand, when the sample is present in the flow path, the light incident on the ripple structure 63a from above is refracted by the ripple structure 63a and incident on the flow path. Therefore, there is a difference in brightness in the captured image of the measuring unit 63 depending on whether the sample is present or not in the stream (a difference appears in the brightness value). As a result, when the analysis image is generated based on the captured image (individual image), the information acquisition unit 104 can easily distinguish (determine) the presence / absence of the sample in the measurement unit 63 based on the analysis image. Can be done.
- FIG. 22 shows the distribution of the difference in the above-mentioned luminance values acquired when the measuring unit 63 has the ripple structure 63a (corresponding to the histogram in FIG. 20). From the figure, it is possible to widen the difference in brightness value with / without sample (empty chip) regardless of the type of sample (plasma / water), and it is easy to have / without sample based on the above distribution. It can be seen that it can be distinguished.
- FIG. 23 shows the distribution of the difference in the luminance values acquired when the measuring unit 63 does not have the ripple structure 63a. From the figure, it can be seen that it is difficult to distinguish between plasma and water because the difference in luminance value does not widen between plasma and water and the distributions are similar to each other. In addition, the distribution of plasma and water is similar to the distribution when empty chips are used, and it can be seen that it is difficult to distinguish between plasma and empty chips and water and empty chips.
- the information acquisition unit 104 described above extracts an edge in an image from a plurality of individual images to be acquired in each of the first period T1 and the second period T2 shown in FIG. Based on this, the presence or absence of abnormality may be determined.
- FIG. 24 shows an arbitrary individual image of the measuring unit 63.
- the regular position of the measuring unit 63 in the captured image is shown by a broken line, and the position deviated from the regular position is shown by a solid line. Further, in FIG. 24, for convenience, the illustration of the blown-out area that appears due to the point light source is omitted.
- the information acquisition unit 104 extracts the position of the edge 63e of the measurement unit 63 by a known edge extraction process for each of the plurality of individual images of the measurement unit 63. If the information acquisition unit 104 has an individual image in which the position of the edge 63e is different from the others among the plurality of individual images, the information acquisition unit 104 can determine that the photographing position of the measuring unit 63 is displaced.
- the information acquisition unit 104 determines whether or not the measurement unit 63 of the chip 6 is displaced, and if there is a positional deviation, there is an abnormality in the device (sample inspection device 1), or the measurement environment is set. It is possible to determine that there is an abnormality and take necessary measures such as causing the device to output an error (for example, a warning sound). In addition, the information acquisition unit 104 may determine the presence or absence of the positional deviation by using the photographed image (individual image) of the container accommodating unit 61 instead of the photographed image (individual image) of the measuring unit 63.
- the chip 6 As an abnormality of the device, there is a state in which the chip 6 is positioned at a relative inclination with respect to the image pickup unit 74 due to, for example, vibration of the motor 82 (see FIG. 4) or unstable rotation of the chip 6. .. Further, as an abnormality in the measurement environment, for example, when the rotation mechanism 80 stops the rotation of the chip 6, the actual stop position deviates from the normal stop position of the chip 6. This deviation of the stop position is likely to occur due to the detection accuracy of the encoder 87 (see FIG. 4).
- FIG. 25 is a block diagram schematically showing another configuration of the sample inspection device 1.
- the sample inspection device 1 further includes a communication unit 94 and a reading unit 95 in addition to the configuration shown in FIG. 4 and the like.
- the communication unit 94 is an interface for communicating with the outside, and includes an antenna, a transmission / reception circuit, a modulation circuit, a demodulation circuit, and the like.
- the reading unit 95 is a device that reads information recorded on the recording medium R (for example, an operation program of the control unit 100), and is composed of a reading device such as a disk drive.
- the reading unit 7 also includes a connection port into which the connection unit of the non-volatile memory is pointed.
- the sample inspection device 1 of FIG. 25 can be configured by a computer in which an operation program (application software) is installed.
- a computer for example, the control unit 100 as a CPU
- each unit of the sample inspection device 1 can be operated to execute each process (each step) described above.
- Such a program is acquired by downloading from the outside via, for example, the network and the communication unit 94, and is stored in the storage unit 93.
- the program is recorded on a computer-readable recording medium R such as a CD-ROM (Compact Disk-Read Only Memory), and the program is read from the recording medium R by the reading unit 95 and stored in the storage unit 93. It may be in the form. That is, the program of this embodiment is a program for causing a computer to execute the above-mentioned information processing method for acquiring object information. Further, the recording medium R of the present embodiment is a computer-readable recording medium on which the above program is recorded.
- the number of pixels of the analysis image MA does not necessarily have to be the same as the number of pixels of the individual images K1 to K12.
- the number of pixels of the image MA for analysis may be the number of pixels for one line (A1-A2 direction) of the individual images K1 to K12, or may be the number of pixels for 33 lines.
- the number of pixels of the individual images K1 to K12 is m ⁇ n (m and n are positive numbers of 2 or more)
- the number of pixels of the analysis image MA is A ⁇ B (A is a positive number of m-1 or less).
- B may be a positive number of n-1 or less).
- the average of the brightness values of all the pixels of the individual image is calculated, the deviation value is calculated for the brightness value of each pixel of the individual image, and a plurality of individual pixels are calculated.
- the average of the deviation values in the pixels at the same position in the image may be obtained, and the brightness value corresponding to the average deviation value may be used as the brightness value of the pixels at the same position in the analysis image MA.
- the information processing method for acquiring the object information described in the present embodiment may be realized by a system including the sample test device 1 and an external server. That is, the sample inspection device 11 may transmit the data (luminance value) of each individual image to the server, and the server may execute the process of generating the image MA for analysis and the process of acquiring the object information.
- test object and the test device are not limited to the sample and the sample test device 1, respectively.
- an analysis image is generated based on a plurality of individual images and a target is generated based on the generated analysis image, as in the present embodiment. It is possible to acquire object information.
- the present invention can be used, for example, as a sample inspection device for inspecting a sample as a test object.
- Specimen inspection device 1 Specimen inspection device (inspection device) 5 Specimen container (containment container) 6 Tip 61 Container housing 63 Weighing section (window for detecting inspected objects) 64 Label 64a 2D code (identification information) 74 Imaging unit 76 Measuring unit 80 Rotating mechanism 82 Motor (driving unit) 87 Encoder (Rotation position detector) 92 Light source 93 Storage unit 102 Light source control unit 103 Image generation unit 104 Information acquisition unit
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Abstract
Description
図1は、本実施形態の検査装置の一例である検体検査装置1の内部構成を示す断面図である。検体検査装置1は、筐体内に測定室71を有する。測定室71は、検体容器5を装填したチップ6を収容するとともに、チップ6内の検体に対して各種の測定を行う。測定室71内に収容されたチップ6は、ホルダ72によって第1ステージ83上に押さえ付けられ、保持される。
図2は、検体容器5およびチップ6を拡大して示す正面図である。検体容器5の表面には、検体の検査に必要な量の目安となる黒色のマーカー5aが付されている。検体の必要量は、検査する検体の種類に応じて異なる。そのため、検体容器5においてマーカー5aが付される位置も、検体の種類に応じて異なる。ユーザ(医師、臨床検査技師など)は、マーカー5aを目標にして検体を検体容器5に導入することにより、検査する検体ごとに、必要量の検体を検体容器5に導入することができる。
次に、検体検査装置1の詳細について、再び図1を参照して説明する。測定室71の上部には、上述したようにチップ6の2次元コード64aを読み取るための撮像部74が設けられる。撮像部74は、例えば撮影によってカラー画像を取得するカメラで構成される。撮像部74は、保持部75によって測定室71の上部に保持される。
検査物または検査物の収容容器の状態に関する情報を、ここでは「対象物情報」とも称する。例えば、検体容器5における検体の有無、検体容器5に必要量の検体が導入されているか否か、検体容器5自体がチップ6に収容されているか否か、などの情報は、対象物情報の例である。また、撮像部74によって撮影されて取得された画像を構成する各画素の画像データ(画素値)を、ここでは「輝度値」とも称する。輝度値は、例えば8ビットで0(暗)~255(明)の値を取り得る。
図4は、検体検査装置1のハードウェア構成を示すブロック図である。検体検査装置1は、上述の構成に加えて、回転機構80と、制御部100と、をさらに備える。回転機構80は、チップ6を回転させる機構であり、上述のモータ82および駆動力伝達機構85のほか、エンコーダ87を含んで構成される。エンコーダ87は、モータ82(駆動部)の回転位置を検出する回転位置検出部の一例である。
以下、上記構成による対象物情報の具体的な取得方法について説明する。
図5は、対象物情報の取得方法の流れを示すフローチャートである。まず、測定室71の第1ステージ83上にチップ6がセットされると、回転機構80が回転テーブル81および第1ステージ83を回転させて、チップ6を各光源92の照明領域LAに位置させる(S1)。
次に、対象物情報を取得する別の方法として、2つの解析用画像における輝度値の差を用いる方法について説明する。まず、図7で示した解析用画像MAを、第1解析用画像M1とする。つまり、検体容器5に検体を収容した状態で画像生成部103が生成した解析用画像MAを、第1解析用画像M1とする。一方、図9は、検体容器5に検体を収容していない状態で画像生成部103が生成した解析用画像MAを示す。ここでは、図9の解析用画像MAを、図7の第1解析用画像M1と区別するために、第2解析用画像M2と称する。
図12は、チップ6の回転の前後で取得される上記した第1解析用画像M1および第2解析用画像M2の一部分をそれぞれ模式的に示している。ここでは、検体容器5に付された黒色のマーカー5aの像5a1も第1解析用画像M1および第2解析用画像M2に含まれるとする。
検査物が血漿などの透明に近い液体である場合、レンズ効果によって血漿の端面が明るくなることは前述の通りである。特に、測定室71内で撮像部74側から見てチップ6の背景色が黒色である場合(例えば検査項目がhsCRPのチップ6を用いた場合)、血漿の端面の明るさは、より目立つ。
図17は、複数の解析用画像MAをチップ6の同一位置で重ね合わせた合成解析用画像MA-Coを模式的に示している。なお、上記解析用画像MAは、例えば(6-1.輝度値そのものを用いる方法)で説明した解析用画像MAを用いることができる。
図18は、撮像部74によるチップ6の撮影を2段階で行って吸光度測定(測光)を行う場合の時間的な流れ(シーケンス)を模式的に示している。撮像部74は、第1期間T1と第2期間T2とのそれぞれにおいて、複数の個別画像を取得してもよい。以下、図1~図4で示した構成を参照しながら、シーケンスの詳細について説明する。
上記したチップ6のマイクロ流路には、血球分離部が設けられている。血球分離部とは、検体として全血が検体容器5に収容され、チップ6の回転によってマイクロ流路内に導入されたときに、全血に含まれる血球が遠心分離によって溜まる箇所である。検査項目が例えばCRPである場合、血球分離部で血球が取り除かれた血漿がマイクロ流路をさらに流れる。そして、上記血漿が検査試薬と反応して、吸光度の測定対象となる反応物が生成される。
図21は、チップ6の計量部63を拡大して示す平面図である。計量部63は、波紋構造63aを有する。波紋構造63aは、計量部63において、チップ6内の流路を流れる検体と接触する同心円状の凹凸面である。
上記した情報取得部104は、図18で示した第1期間T1および第2期間T2のそれぞれにおいて、取得される複数の個別画像から、画像中のエッジを抽出し、抽出したエッジの位置ズレに基づいて、異常の有無を判断してもよい。
図25は、検体検査装置1の他の構成を模式的に示すブロック図である。検体検査装置1は、図4等で示した構成に加えて、通信部94および読取部95をさらに備える。通信部94は、外部と通信するためのインターフェースであり、アンテナ、送受信回路、変調回路、復調回路などを含んで構成される。
解析用画像MAの画素数は必ずしも個別画像K1~K12の画素数と同じでなくてもよい。例えば、解析用画像MAの画素数は、個別画像K1~K12の1ライン分(A1-A2方向)の画素数であってもよいし、33ライン分の画素数であってもよい。また、個別画像K1~K12の画素数がm×n(m、nは2以上の正数)であるとき、解析用画像MAの画素数はA×B(Aはm-1以下の正数、Bはn-1以下の正数)であってもよい。
5 検体容器(収容容器)
6 チップ
61 容器収容部
63 計量部(検査物検出用の窓部)
64 ラベル
64a 2次元コード(識別情報)
74 撮像部
76 測定部
80 回転機構
82 モータ(駆動部)
87 エンコーダ(回転位置検出部)
92 光源
93 記憶部
102 光源制御部
103 画像生成部
104 情報取得部
Claims (20)
- 異なる位置で点灯可能な少なくとも1つの光源と、
前記少なくとも1つの光源の点灯を制御する光源制御部と、
検査物を収容する収容容器が装填されるチップを回転させる回転機構と、
前記回転機構による回転により、前記少なくとも1つの光源の点灯によって照明される照明領域に位置させた前記チップを、点灯する前記光源の前記異なる位置ごとに異なるタイミングで撮影して、複数の個別画像を取得する撮像部と、
前記複数の個別画像に基づいて、解析用画像を生成する画像生成部と、
前記解析用画像に基づいて、前記検査物または前記収容容器の状態に関する対象物情報を取得する情報取得部と、を備え、
前記解析用画像の各画素の輝度値は、前記複数の個別画像間で同一位置の画素の輝度値を用いて算出される、検査装置。 - 前記光源を複数有し、
前記光源制御部は、前記複数の光源を前記異なる位置ごとに異なるタイミングで点灯させる、請求項1に記載の検査装置。 - 前記解析用画像の各画素は、前記複数の個別画像間で同一位置の画素についての平均輝度として許容される平均輝度範囲内の輝度値をそれぞれ有する、請求項1または2に記載の検査装置。
- 前記平均輝度範囲は、前記複数の個別画像間での前記同一位置の画素についての輝度値の分布を正規化したときに、平均輝度値をnとし、標準偏差をσとして、n-σ以上n+σ以下に収まる輝度値の範囲である、請求項3に記載の検査装置。
- 前記情報取得部は、前記解析用画像における、予め設定された1ラインの画素の前記輝度値に基づいて、前記対象物情報を取得する、請求項1から4のいずれかに記載の検査装置。
- 前記画像生成部が、前記収容容器への前記検査物の収容状態で生成した前記解析用画像を第1解析用画像とし、前記収容容器への前記検査物の非収容状態で生成した前記解析用画像を第2解析用画像としたとき、
前記情報取得部は、前記第1解析用画像および前記第2解析用画像の同一位置の画素間での前記輝度値の差に基づいて、前記対象物情報を取得する、請求項1から4のいずれかに記載の検査装置。 - 前記撮像部は、前記検査物を収容した前記収容容器が装填された前記チップを前記回転機構によって回転させる前に、点灯する前記光源の前記異なる位置ごとに異なるタイミングで前記チップを撮影して、複数の第1個別画像を取得する一方、前記回転機構による前記チップの回転によって前記検査物が前記収容容器から前記チップ内に流れ込んだ後に、点灯する前記光源の前記異なる位置ごとに異なるタイミングで前記チップを撮影して、複数の第2個別画像を取得し、
前記画像生成部は、前記複数の第1個別画像に基づいて、前記第1解析用画像を生成し、前記複数の第2個別画像に基づいて、前記第2解析用画像を生成する、請求項6に記載の検査装置。 - 前記第2解析用画像を予め記憶する記憶部をさらに備え、
前記情報取得部は、前記第1解析用画像と、前記記憶部に記憶された前記第2解析用画像とにおける同一位置の画素間での前記輝度値の差に基づいて、前記対象物情報を取得する、請求項6に記載の検査装置。 - 前記情報取得部は、前記第1解析用画像および前記第2解析用画像のそれぞれにおいて、予め設定された1ラインの各画素の位置ごとに、前記1ラインおよび前記1ラインと平行な複数ラインを含む特定領域内で、前記1ラインと垂直な幅方向に並ぶ複数の画素間で輝度値を平均した幅方向平均値を算出し、前記第1解析用画像と前記第2解析用画像との間での前記幅方向平均値の差に基づいて、前記対象物情報を取得する、請求項6から8のいずれかに記載の検査装置。
- 前記情報取得部は、特定の前記チップについて得られる、前記第1解析用画像と前記第2解析用画像との間での前記幅方向平均値の差の前記1ラインの分布において、基準値よりも高い第1閾値に基づいて規定される大区間内で、前記基準値よりも低い第2閾値に基づいて規定される小区間を抽出し、前記小区間における前記幅方向平均値の差に基づいて、前記対象物情報を取得する、請求項9に記載の検査装置。
- 前記チップには、前記検査物の検査項目を識別するための識別情報を含むラベルが付されており、
前記撮像部は、予め前記ラベルを撮影して前記識別情報を読み取り、
前記情報取得部は、前記撮像部が読み取った前記識別情報に基づいて、前記チップの種類を判断する、請求項10に記載の検査装置。 - 前記回転機構は、
前記チップを回転させる駆動力を発生する駆動部と、
前記駆動部の回転位置を検出する回転位置検出部と、を備え、
前記撮像部は、前記チップの異なる回転位置ごとに、前記チップの一部を撮影して前記複数の個別画像を取得し、
前記画像生成部は、前記チップの異なる回転位置ごとに、前記複数の個別画像に基づいて前記解析用画像を取得するとともに、前記回転位置検出部によって検出される前記回転位置に基づいて、前記チップの同一位置で前記複数の解析用画像を重ね合わせて合成解析用画像を生成し、
前記情報取得部は、前記合成解析用画像に基づいて、前記対象物情報を取得する、請求項1から11のいずれかに記載の検査装置。 - 前記チップは、
前記収容容器が装填される容器収容部と、
前記回転機構が前記チップを回転させたときに前記収容容器内の前記検査物のうちで必要量以外の検査物が廃液として流れる流路に位置する、検査物検出用の窓部と、を有し、
前記撮像部は、前記複数の個別画像を、第1期間と、前記第1期間よりも時間的に後の第2期間とのそれぞれにおいて取得し、
前記第1期間では、前記撮像部は、前記回転機構によって前記照明領域に位置させた前記チップの前記容器収容部を撮影することにより、前記複数の個別画像を取得し、
前記第2期間では、前記撮像部は、前記回転機構によって前記照明領域に位置させた前記チップの前記窓部を撮影することにより、前記複数の個別画像を取得する、請求項1から12のいずれかに記載の検査装置。 - 前記画像生成部は、前記第1期間および前記第2期間のそれぞれにおいて、取得された前記複数の個別画像に基づいて前記解析用画像を生成し、
前記情報取得部は、前記第1期間および前記第2期間のそれぞれにおいて、生成された前記解析用画像に基づいて前記対象物情報を取得し、取得した2つの前記対象物情報に基づいて、前記検査物の状態または前記収容容器の状態を総合的に判断する、請求項13に記載の検査装置。 - 前記情報取得部は、2つの前記対象物情報に基づいて、必要量の前記検査物が前記収容容器に収容されているか否かを判断する、請求項14に記載の検査装置。
- 前記撮像部は、前記第2期間において、前記チップの回転によって前記検査物が前記窓部に到達する前に前記窓部を撮影することにより、前記複数の個別画像の各々を、第1窓部個別画像として取得するとともに、前記チップの回転によって前記検査物が前記窓部に到達した後に前記窓部を撮影することにより、前記複数の個別画像の各々を、第2窓部個別画像として取得し、
前記画像生成部は、前記複数の第1窓部個別画像に基づいて、前記解析用画像としての第1窓部解析用画像を生成するとともに、前記複数の第2窓部個別画像に基づいて、前記解析用画像としての第2窓部解析用画像を生成し、
前記情報取得部は、前記第1窓部解析用画像と前記第2窓部解析用画像との間での同一位置の画素の輝度値の差の分布に基づいて、前記検査物の状態を判断する、請求項13から15のいずれかに記載の検査装置。 - 前記情報取得部は、前記第1期間および前記第2期間のそれぞれにおいて、取得される前記複数の個別画像から、画像中のエッジを抽出し、抽出したエッジの位置ズレに基づいて、異常の有無を判断する、請求項13から16のいずれかに記載の検査装置。
- 前記解析用画像の各画素の輝度値は、前記複数の個別画像間で前記同一位置の画素について輝度値を平均した平均輝度値である、請求項1から18のいずれかに記載の検査装置。
- 検査物を収容する収容容器が装填されるチップを回転させて照明領域に位置させる工程と、
少なくとも1つの光源を点灯させて、前記照明領域に位置する前記チップに向けて光を出射させる工程と、
前記光源によって照明された前記チップを撮影して、個別画像を取得する工程と、
前記チップの撮影後、前記チップの撮影時の位置とは別の位置で少なくとも1つの光源を点灯させて、前記照明領域に位置する前記チップに向けて光を出射させる工程と、
前記別の位置の前記光源によって照明された前記チップを撮影して、別の個別画像を取得する工程と、
取得した複数の前記個別画像に基づいて、解析用画像を生成する工程と、
前記解析用画像に基づいて、前記検査物または前記収容容器の状態に関する対象物情報を取得する工程と、を含み、
前記解析用画像の各画素の輝度値は、前記複数の個別画像間で同一位置の画素の輝度値を用いて算出される、情報処理方法。 - 請求項19に記載の情報処理方法をコンピュータに実行させるためのプログラム。
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