JP4707563B2 - Mobile X-ray device - Google Patents

Description

  The present invention relates to a mobile X-ray apparatus. In particular, the present invention relates to a mobile X-ray apparatus that can reduce the difference between subjects at the time of imaging.

  A mobile apparatus is known as a medical X-ray imaging apparatus (for example, Patent Document 1). This mobile X-ray apparatus includes a mobile carriage, a main body mounted on the mobile carriage, an X-ray generator that irradiates an examinee with X-rays, and a support mechanism that supports the X-ray generator movably from the main body. And have. For taking an X-ray image, an X-ray detector that detects X-rays transmitted through the subject is used. An X-ray film, IP (Imaging Plate), or a flat panel detector (FPD: Flat Panel Detector) is used for the X-ray detection unit.

  When taking an image, the X-ray apparatus is first moved near the subject. Usually, a doctor gives an instruction to take a picture by handing a photographing instruction sheet to the photographer, or obtaining patient information and photographing technique information necessary for a reservation for photographing from a RIS (Radiology Information System) server. . The photographer performs imaging by determining an imaging region and imaging technique based on patient data such as the instruction sheet. At that time, whether or not the subject described in the radiography instruction sheet or patient information is the same as the subject who is going to perform the radiography should be made by calling the name from the radiographer to the subject. There are many.

JP 2004-113326 A

  However, in the conventional mobile X-ray apparatus, there is no particular mechanism for confirming whether or not the subject described in the imaging instruction sheet and the subject to be actually photographed are the same. Mistakes may occur. For example, in identity verification by calling, the subject is likely to be mistaken due to a mistake in the call of the photographer or a mistake in the hearing of the subject, and also in the case of the subject having the same name. In addition, in the case of an unconscious subject, identity verification by calling is completely impossible. For this reason, there is a demand for the establishment of a technique that enables even the unconscious subject to confirm the identity.

  The present invention has been made in view of the above-described circumstances, and one of its purposes is to provide a mobile X-ray apparatus that can reduce the difference between subjects.

  The present invention achieves the above-mentioned object by collating the identification information of the subject who is scheduled to shoot with the subject who is actually going to shoot.

  A mobile X-ray apparatus of the present invention includes an X-ray generation unit that irradiates a subject with X-rays, a main body that supports the X-ray generation unit via a support mechanism, and a movable carriage that runs the main body. Then, an X-ray image is taken using X-rays transmitted through the subject. And in this apparatus, the memory | storage means which can memorize | store the identification information of the subject to whom imaging | photography is reserved (reservation subject) as master information, and the subject who actually intends to image | photograph (imaging subject) Acquisition means for acquiring the personal identification information, and determination means for collating the acquired personal identification information with the master information, determining whether the imaging subject is the same as the reserved subject, and outputting the determination result It is characterized by providing.

  The personal identification information includes biological identification information and non-biological identification information of the subject. The biometric identification information refers to physical characteristics that vary from person to person. By using this biometric identification information, it is possible to reliably determine whether the reserved subject and the photographing subject are compatible. The non-biometric identification information will be described later.

[Biometric identification information]
More specific biometric identification information includes face form, fingerprint, lip print, hand vein pattern, retina pattern, iris pattern, voice print, and the like. The acquisition means is also different according to each biometric identification information.

<Face>
When the biometric identification information is in the form of the subject's face, the acquisition means is an imaging means for photographing the subject's face. Except in exceptional cases such as twins, the face form varies depending on the individual, so that accurate identity verification can be performed. In particular, identification of the face by the form of the face is effective even in the case of an emergency patient who is unconscious and has no identification card.

  In addition, face shape information can be easily obtained by various photographing means. A camera can be suitably used as the photographing means. This camera may be a camera that can shoot a still image like a digital camera or a camera that can shoot a moving image like a TV camera. Any camera is preferably provided in the X-ray generator. The X-ray generator can usually be moved from the main body to various positions via a support mechanism. If a camera is provided in the X-ray generation unit, the X-ray generation unit is positioned above the subject's face, and the operation feeling is the same as when taking an X-ray image by X-rays. The subject's face can be easily photographed.

  In particular, the camera is preferably arranged so as to have an imaging range substantially corresponding to the X-ray irradiation range. In general, the X-ray generation unit includes an X-ray source that generates X-rays and an X-ray diaphragm that controls an irradiation range of the X-rays generated by the X-ray source. For example, a camera may be built in this X-ray diaphragm. In general, the X-ray diaphragm is provided with an illuminating device for confirming the X-ray irradiation range. This illuminating device has a light projection range substantially corresponding to the X-ray irradiation range. By providing a camera instead of or in addition to this illumination, the X-ray irradiation range is provided to the camera. It is possible to have an imaging range substantially corresponding to the above. With such an arrangement of the cameras, it is possible to perform photographing with the camera for identity verification with the same operational feeling as in the case of X-ray photography. Furthermore, it is preferable that an image photographed by the camera is stored in the photographed image storage means so that it can be confirmed on a monitor as needed.

  In order to authenticate the face of the reserved subject and the photographic subject by the determination means, for example, from the digital image of the face, each part such as the face contour shape, eyebrows, eyes, nose, mouth, cheek, ears, etc. It is only necessary to obtain various information such as the distance interval and the color of the skin, recognize the form of the human face as data, and compare the recognized face data with the master information.

<Fingerprint>
When the biometric identification information is the fingerprint of the subject, the acquisition means may be a fingerprint scanner. Fingerprints have a track record in individual identification, and the identity of the subject can be reliably confirmed. In particular, even an unconscious subject who cannot respond to a call can easily obtain a fingerprint without causing physical damage or pain.

  There are various types of fingerprint scanners such as an optical type, an electrostatic type, a thermal type, an electric field type, and a pressure type. For example, in an electrostatic fingerprint scanner, a fingerprint image is obtained by a difference in charge amount between peaks and valleys generated when a finger is pressed against the surface of a semiconductor sensor. In addition, with a thermal fingerprint scanner, a fingerprint image can be obtained from the temperature difference between a peak that contacts the sensor and a non-contact valley. With an electric fingerprint scanner, a weak current that flows on the surface of the finger can cause a peak and a valley. A fingerprint image can be obtained from the distribution of the generated electric field.

  In order to determine the identity of the fingerprint of the reserved subject and the photographic subject by the judging means, for example, for the fingerprint image of the photographic subject and the fingerprint image of the master information, a plurality of feature points in each fingerprint image Can be done by comparing. More specifically, (1) compare ridge end points and ridge branch points or ridge directions in fingerprint images as feature points, and (2) ridge lines passing between these end points and branch points. Fingerprint authentication is performed by using the number as a comparison feature amount, or (3) comparing fingerprint patterns in a specific area in a fingerprint image by pattern matching.

<Lipstick>
When the biometric identification information is the lip print of the subject, the acquisition means may be a lip print scanner. The lip pattern is a pattern represented by a ridge formed on the surface of the lips, and an individual can be identified at the same level as a fingerprint.

  In order to obtain the lip pattern, for example, an appropriate pigment may be applied to the lips of the subject, and an appropriate sheet may be pressed against the lips to copy the lip pattern onto the sheet. Then, the lip pattern of the sheet may be captured by a general image scanner or the like. Moreover, since the lip can be easily acquired even by an unconscious subject, it is effective for identification.

  The determination of the lip pattern by the determination means can be basically performed based on a concept similar to that of fingerprint authentication.

<Venous pattern>
When the biometric identification information is a vein pattern of the subject's hand, the acquisition means may be a vein pattern scanner. The pattern of the veins on the palm and back of the hand is also different for each individual, and the pattern is unchanged except that the size changes with the growth of the person. In addition, since the vein pattern is information in the body, it is preferable biometric identification information in that it is difficult for others to know. Since the vein pattern can be easily acquired even by an unconscious subject, it is effective for identity verification.

  The vein pattern scanner acquires a vein pattern image by utilizing the characteristic that only the veins appear black when irradiated with near infrared rays. This scanner includes a contact type and a non-contact type. However, if the scanner is a non-contact type, it is possible to suppress a reduction in the recognition rate due to the contamination of the scanner due to contact between the hand and the scanner.

  The determination of the identity of the vein pattern by the determination means is performed by, for example, extracting a vein and a background other than that from a hand image and extracting a clear image of the vein, and comparing the vein pattern by pattern matching based on the image. Or using the branching characteristics of veins. This branching characteristic can be obtained, for example, by thinning the vein pattern, sequentially tracing from one branch point to the next branch point, and finally to the last branch point, and analyzing the coordinates of each branch point, the distance between branch points, etc. It is done.

<Retina pattern>
When the biometric identification information is the retinal pattern of the subject, the acquisition means may be a retinal pattern scanner. A retinal pattern is a blood vessel pattern of the retina. This pattern is different for each individual, does not change throughout the lifetime, and exists in the eye and is not exposed to the outside, so it can be used effectively for identity verification. In addition, even in the case of an unconscious subject, the blood vessel pattern can be easily acquired by expanding the eyelid and exposing the eyeball.

  The retinal pattern scanner scans the retina with weak infrared rays. At that time, since the blood vessel part warmly absorbs infrared rays, the reflected light reflects the blood vessel pattern. Then, the retina pattern can be acquired by detecting the reflected light.

  The determination of the identity of the retinal pattern by the determination means can be basically performed based on a concept similar to the vein pattern described above.

<Iris pattern>
When the biometric identification information is the iris pattern of the subject, the acquisition unit may use an iris pattern scanner. The iris is a donut-shaped portion inside the black eye and outside the pupil, and is composed of muscles that adjust the degree of pupil opening. It is known that a wrinkle is generated from the pupil toward the outside of the iris, and this wrinkle pattern becomes an iris pattern unique to the person. Therefore, this iris pattern can be effectively used for identity verification. Also, acquisition of an iris pattern can be easily performed by unconscious subjects by spreading their eyelids and exposing their eyes.

  The iris pattern scanner acquires, for example, an eye image and cuts out an iris portion from the image. Then, a plurality of analysis regions are determined for the cut out iris portion, and the change in the density of these analysis regions is acquired as iris data indicating the iris pattern.

  The determination of the identity of the iris pattern by the determination means is performed, for example, by matching iris data. More specifically, iris data, which is a change in light and shade of the analysis region, is normalized by comparing with master information, and a Hamming distance is calculated. And if this Hamming distance is below a fixed value, it will determine with the same person, and if it exceeds a fixed value, it will determine with another person.

<Voiceprint>
When the biometric identification information is a test subject's voiceprint, a microphone and a recording unit for recording the voice acquired by the microphone can be suitably used as the acquisition unit. Voiceprints are effective for identifying individuals because they clearly represent differences in the shape and size of the vocal organs of each individual, as well as differences in articulation. In addition, identity verification by a voiceprint can be performed via a telephone or the like even when the subject is away from the X-ray apparatus. Therefore, when photographing a plurality of subjects sequentially, when the subject X in the patient room A is photographed, the identity of the next subject Y in the patient room B is confirmed in advance by telephone or the like. It can also be left.

  This identity verification is typically performed by using a sound spectrogram with the horizontal axis representing time and the vertical axis representing frequency. The recording means can use various storage media such as a magnetic tape and a semiconductor memory as long as audio data can be recorded.

[Non-biometric identification information]
On the other hand, the personal identification information may be non-biometric identification information of the subject. Non-biometric identification information refers to information that can identify a subject other than biological identification information. A typical example is ID information of a subject. This ID information usually only needs to include an ID number that identifies the subject. In addition, the name, date of birth, sex, etc. of the subject may be included.

  Such ID information may be displayed as a barcode or recorded on an ID card for use. It is preferable to attach a barcode or ID card to the subject. Specific examples of this accessory include hanging a barcode printed card or ID card on the subject's neck, wrist or ankle, or attaching these cards to the subject's bed by appropriate means. It is done.

  When the ID information is displayed as a barcode, the acquisition unit may use a barcode reader. There are already many bar code readers on the market. In particular, a handy type barcode reader can be suitably used. Such a handy type bar code reader can be freely used by being connected to the main body of the X-ray apparatus or the X-ray generation unit via a cord. In particular, if a barcode reader is provided in the X-ray generator, the distance from the barcode reader to the subject can be reduced by moving the X-ray generator via the support mechanism, and the length of the code is shortened. it can.

  When the ID information is displayed as an ID card, the acquisition unit may use an ID card reader. There are already many ID card readers on the market. For example, a small ID card reader having a slit for passing an ID card can be suitably used. Such a small ID card reader can be connected to the main body of the X-ray apparatus and the X-ray generator via a cord in the same manner as the barcode reader, or can be directly fixed to the main body without using a cord.

[Use of judgment results]
In the mobile X-ray apparatus of the present invention, it is preferable to have a warning means for indicating the determination result when the determination means determines that the imaging subject is not the same as the reserved subject. By providing the warning means, it is possible to reliably notify the photographer that the subject is wrong. Specific means for indicating the determination result includes a means that can be visually recognized and a means that can be recognized by hearing. Examples of the former include displaying on the monitor that a subject is confused with characters, figures, symbols, etc., and lighting a lamp. The latter is to sound a buzzer.

  In the mobile X-ray apparatus of the present invention, it is preferable that the mobile X-ray apparatus has an imaging control means for restricting the imaging operation when the determination means determines that the imaging subject is not the same as the reserved subject. When it is found that the subject is wrong, it is possible to prevent the wrong subject from being photographed by prohibiting photographing by this photographing control means. Restriction of the imaging operation includes (1) controlling the X-ray apparatus so that exposure cannot be performed even if the imaging condition setting input cannot be performed, or (2) the imaging condition setting input can be performed.

  The mobile X-ray apparatus of the present invention can achieve the following effects.

  (1) The mobile X-ray apparatus of the present invention reduces the difference between the subject by collating the subject whose imaging is reserved and the identification information of the subject who is actually going to take an image. be able to.

  (2) In the mobile X-ray apparatus of the present invention, by using the subject's biometric identification information for identity verification, it is possible to perform reliable identity verification and further prevent the subject from being mistaken. it can.

  (3) In the mobile X-ray apparatus of the present invention, the subject is unconscious by using a facial form, fingerprint, lip print, hand vein pattern, retinal pattern, iris pattern as biometric identification information. But you can verify your identity.

  (4) In the mobile X-ray apparatus of the present invention, when using the subject's ID information as the non-biometric identification information, the display information or storage medium of this ID information is attached to the subject, thereby ensuring the reliability. High identity verification can be performed, and the difference between the subjects can be reduced.

  (5) In the mobile X-ray apparatus of the present invention, when it is determined that the imaging subject is not the same as the reserved subject, a warning means for indicating the determination result is provided, so that the determination result is assured to the photographer. To avoid taking a picture with the subject misunderstood.

  (6) In the mobile X-ray apparatus of the present invention, when it is determined that the imaging subject is not the same as the reserved subject, the imaging subject is provided with an imaging control means for restricting the imaging operation. Even if an attempt is made to take a picture with a mistake, the picture can be prohibited.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Embodiment 1: Camera]
<Device configuration>
First, an embodiment of the present invention will be described in which biometric identification information is used as face information of a subject, and the information acquisition means is a camera. As shown in FIG. 1, the mobile X-ray apparatus of the present invention has a mobile carriage 1, a main body 2, an X-ray generator 3, and a support mechanism 4. Here, as shown in FIG. 2, the main body 2 includes an operation panel 20, an imaging control means 21, and a high voltage generator 22, and can irradiate X-rays from the X-ray generator 3 under predetermined imaging conditions. In addition, a traveling operation lever 23, a traveling control means 24, and a motor 25 are provided, and the X-ray apparatus can travel by driving the wheels 11 of the movable carriage 1. On the other hand, the X-ray generation unit 3 is provided with a TV camera 26A (see FIG. 1) as an acquisition means 26, and the identity of the subject P is obtained by using the face of the subject P acquired by the camera 26A as identification information. Used for. And in order to image | photograph the subject P with this apparatus, the X-ray which permeate | transmitted the subject P on a bed is detected by the X-ray detection part 5. FIG.

  The movable carriage 1 is provided with wheels 11 that allow the X-ray apparatus to move. The X-ray apparatus is caused to travel by driving the wheels 11 with a motor 25 (FIG. 2) or manually.

  The main body 2 is installed on the carriage 1 and includes an imaging control means 21 for controlling mechanisms related to imaging such as the X-ray generation unit 3 and a traveling control means 24 for controlling mechanisms related to traveling such as a motor 25. Operations such as setting the imaging conditions of the X-ray device are performed by operating the operation panel 20 provided at the upper rear of the main body, and traveling operations such as forward / backward movement of the X-ray device are provided at the rear of the main body. Perform with lever 23.

  Further, the main body 2 has a determination means 27 built therein. The judging means 27 compares the face data of the subject acquired by the camera with the master information, and the subject who is scheduled to shoot (the reserved subject) and the subject who is going to shoot (the photographic subject). Determine the identity of examiner P). And the determination result by this determination means 27 can be displayed on the monitor 28 provided in the back of the main body or the X-ray generator. If there is a monitor 28 in the X-ray generator 3, it is possible to immediately confirm the imaging result of the camera 26A without returning to the main body. The monitor 28 can also display a face image of the subject P photographed by the camera 26A as necessary.

  In addition, the main body 2 is provided with input / output means for inputting / outputting data to / from a RIS server (not shown). RIS is a support system that provides integrated services such as reservation of X-ray examinations, reception of examinations, interpretation of examination data, storage, medical office work, and billing by linking existing hospital information systems online. If the input / output means of this RIS server and X-ray device are connected via a LAN cable, for example, patient information and imaging technique information necessary for imaging reservations can be obtained from the server, and the captured image data can be transferred via RIS. Can be. Patient information includes the ID number, gender, name, date of birth, address, etc. that identify the subject, and the master information of the reserved subject is also included in the patient information obtained from this RIS server. . The master information is the face data of the reserved subject acquired in advance, and when it is obtained from the RIS server, it is stored in the storage means 29 built in the main body 2. The acquisition of the master information stored in the RIS server may be performed by photographing the subject's face with the camera 26A, similarly to the acquisition of the face data of the reserved subject described later.

  The X-ray generation unit 3 includes an X-ray tube 31 that generates X-rays and an X-ray diaphragm 32 that limits the X-ray irradiation range. When predetermined imaging conditions such as tube voltage and tube current time product are set from the operation panel 20, the high voltage generator 22 is controlled via the imaging control means 21 and a predetermined high voltage is applied to the X-ray tube 31.

  Further, in this example, as shown in FIG. 3, a camera 26 </ b> A is built in the X-ray diaphragm 32. The X-ray diaphragm 32 includes line cone limiting blades 32A and 32B (lower blades), upper blades 32C and 32D, and out-of-focus X-ray reduction blades 32E and 32F (back blades) from the subject side. The upper blades 32C and 32D and the rear blades 32E and 32F operate in conjunction with the lower blades 32A and 32B.

  Here, the TV camera 26A is provided in the X-ray stop 32 so as to have an imaging range substantially corresponding to the X-ray irradiation range. A first mirror 32G is installed between the lower blade 32B and the upper blade 32C, a second mirror 32H is installed in a substantially horizontal direction of the first mirror 32G, and a TV camera 26A is installed above the second mirror 32H. To do. The first mirror 32G is provided so as to be inclined on the use line cone, and reflects light from the subject (subject) toward the second mirror 32H outside the use line cone. The second mirror 32H reflects the light from the first mirror 32G toward the TV camera 26A.

  The first mirror 32G is disposed so that the outer periphery thereof is in contact with the outer edge of the utilization line cone when the X-ray diaphragm 32 is fully opened, and forms a triangle ABC surrounded by the X-ray tube 31. The first mirror 32G forms a trapezoid BCED surrounded by the second mirror 32H, and the second mirror 32H forms a triangle DEF surrounded by the TV camera 26A. Then, the TV camera 26A is arranged so that the area of the triangle ABC is equal to the total area of the trapezoid BCED and the triangle DEF.

  By placing the TV camera 26A inside the X-ray diaphragm 32 and behind the lower blades 32A and 32B (X-ray tube side), the image of the subject displayed on the TV camera 26A can be obtained by the lower blades 32A and 32B. The shooting range will be restricted. As a result, the image of the subject projected on the TV camera 26A can be made equal to the X-ray irradiation range. The operation control of the TV camera 26A such as start / stop of imaging can be performed by an operation switch (not shown) provided in the X-ray generator 3.

  On the other hand, the support mechanism 4 includes a support column 41 and an arm 42, and supports the X-ray generation unit 3 movably with respect to the main body 2. The support column 41 is rotatably attached to the main body 2 with a vertical axis as a rotation axis, and the arm 42 is configured to be bendable at a plurality of locations and can be moved up and down along the support column 41. Therefore, the X-ray generator 3 at the tip of the arm can be aligned with the subject P with a wide degree of freedom by rotating the support column 41, raising and lowering the arm 42, and bending the arm 42.

  Moreover, the X-ray detection part 5 should just be able to catch the X-ray which permeate | transmitted the subject as an image. For example, an X-ray film, an imaging plate, or an FPD can be used for the X-ray detection unit 5.

<Operation procedure>
An imaging procedure using the above X-ray apparatus will be described below. In this description, FIG. 1 to FIG. 3 are referred to as needed in addition to the flowchart of FIG. First, an X-ray apparatus is connected so as to be communicable with a RIS server, and patient information and imaging technique information necessary for imaging reservation are acquired from the RIS server and imaging reservation is made. Among these, the patient information includes master information that is identification information of the reserved subject.

  Next, the X-ray apparatus is moved to the hospital room where the imaging subject P is located, and it is determined whether or not the imaging subject P is the same as the reserved subject. At that time, first, the X-ray generation unit 3 is positioned on the face of the photographing subject P, and the face of the photographing subject P is photographed by the TV camera 26A. Then, as shown in FIG. 4, a predetermined feature amount is extracted from the photographed image, and the obtained feature amount is acquired as face data (identification information) of the photographed subject (step S1). The feature amount includes various information such as the contour shape of the face, the distance between parts such as eyebrows, eyes, nose, mouth, cheeks, ears, and skin color.

  Next, the master information is read from the storage means 29, and the determination means 27 compares the face data of the photographic subject P with the master information (step S2). The determination unit 27 determines that the photographing subject P is the same as the reserved subject when the face data is stored within a predetermined range in comparison with the master information. to decide.

  As a result of this comparison, if it is determined that the imaging subject P is the same as the reserved subject, the X-ray generation unit 3 is moved to the region of interest of the imaging subject, and predetermined imaging conditions are set. To shoot (step S3).

  On the contrary, if it is determined that the photographing subject P is not the same as the reserved subject, a warning is displayed on the monitor 28 that the subject is wrong (step S4), and the photographing control means 21 In step S5, control is performed so that procedures necessary for shooting such as setting of shooting conditions cannot be performed. Then, Step 1 to Step 3 are performed again on an appropriate imaging subject.

  As described above, according to the X-ray apparatus of this example, the identity of the reserved subject and the radiographed subject is obtained using the subject's face as identification information and using the TV camera 26A and the determination means 27. Therefore, it is possible to remarkably reduce the difference between subjects. In particular, since the face data of the subject is acquired by aligning the X-ray generation unit 3 on the face of the subject P and photographing with the TV camera 26A, photographing of the X-ray image with a normal X-ray apparatus is performed. It can be performed with a very similar operation feeling.

[Embodiment 2: Fingerprint scanner]
Next, an embodiment of the present invention in which the biometric identification information is a fingerprint of a subject and the information acquisition means is a fingerprint scanner will be described with reference to FIG. Also in the present embodiment, the basic configuration and operation procedure of the X-ray apparatus are the same as those in the first embodiment except that the personal identification information and the acquisition means are different. Hereinafter, differences from the first embodiment will be mainly described.

  In this X-ray apparatus, a fingerprint scanner 26B is provided on the side surface of the X-ray aperture 32. According to this arrangement of the scanner 26B, the X-ray generation unit 3 is moved in the vicinity of the subject P, and the fingerprint image is easily obtained by taking the hand of the subject to be photographed and pressing the finger against the scanner 26B. be able to. For example, in an electrostatic fingerprint scanner, a fingerprint image is obtained by a difference in charge amount between peaks and valleys generated when a finger is pressed against the surface of a semiconductor sensor. Then, from this fingerprint image, ridge end points, ridge branch points or ridge directions are extracted as feature points, and these feature points are used as fingerprint data.

  When the fingerprint data of the imaging subject P can be acquired, this data is compared with the master information of the reserved subject acquired in advance by the determination means 27, and whether or not the imaging subject P is the same as the reservation subject. Determine whether. This determination procedure is also the same as that of the first embodiment as shown in FIG.

  If it is determined that the radiographed subject P is the same as the reserved subject, the X-ray generator is moved to the region of interest of the radiographed subject P and predetermined imaging conditions are set. And take a picture. Conversely, if it is determined that the subject P is not the same as the scheduled subject, a warning is displayed on the monitor 28 indicating that the subject has been mistaken, and setting of the imaging conditions, etc. Control to prevent the necessary steps for shooting.

  According to the X-ray apparatus of this example, the fingerprint of the subject is used as the identification information, and the identity of the reserved subject and the imaging subject P is determined using the fingerprint scanner 26B and the determination unit 27. It is possible to remarkably reduce the difference between subjects.

  In the above embodiment, the fingerprint scanner 26B is provided in the X-ray generation unit 3, but instead, a handy type fingerprint scanner 26B may be connected to the main body 2 with a cord (see the broken line in FIG. 5). According to this configuration, the fingerprint scanner 26B can be handled with a high degree of freedom, and the fingerprint of the subject P can be easily acquired without moving the X-ray generation unit 3 itself.

[Embodiment 3: Vein pattern scanner]
Next, an embodiment of the present invention in which the biometric identification information is a vein pattern of the subject's palm and the information acquisition means is a vein pattern scanner will be described with reference to FIG. Also in the present embodiment, the basic configuration of the X-ray apparatus and the operation procedure thereof are the same as those in the first embodiment except that the identification information and the acquisition means are different. Hereinafter, differences from the first embodiment will be mainly described.

  In this X-ray apparatus, a handy type vein pattern scanner 26C is connected to the main body 2 with a cord. According to this configuration, the vein pattern scanner 26C can be routed with a high degree of freedom, and the X-ray generator 3 itself is not moved as in the case where the scanner 26C is fixed to the X-ray generator 3 as will be described later. However, the vein pattern of the subject P can be easily acquired. The vein pattern scanner 26C has a contact type and a non-contact type, but if it is a contact type, even if it is an unconscious subject who cannot open the palm with his / her own intention, just press the subject's P palm against the scanner. A vein pattern can be acquired easily. On the other hand, if it is a non-contact type, the palm does not touch the scanner 26C, so that the false recognition of the vein pattern due to the dirt of the scanner 26C can be reduced.

  The vein pattern scanner 26C acquires an image of a vein pattern by using a characteristic that only the veins appear black when irradiated with near infrared rays. Further, the determination of the vein pattern by the determination means 27 is performed by separating the vein and the other background from the palm image to extract a clear image of the vein, and using the branch characteristic of the vein based on the image To do. This branching characteristic is obtained by thinning the vein pattern, sequentially tracing from one branching point to the next branching point, and finally the last branching point, and analyzing the coordinates of each branching point, the distance between the branching points, and the like. If the vein pattern data of the imaging subject can be acquired, this data is compared with the master information of the reserved subject acquired in advance by the determination means 27, and whether or not the imaging subject is the same as the reserved subject. Determine. This determination procedure is also the same as that of the first embodiment as shown in FIG.

  As a result of the determination, if it is determined that the imaging subject P is the same as the reserved subject, the X-ray generator 3 is moved to the region of interest of the imaging subject P, and predetermined imaging conditions are set. Set and take a picture. Conversely, if it is determined that the subject P is not the same as the scheduled subject, a warning is displayed on the monitor 28 indicating that the subject has been mistaken, and setting of the imaging conditions, etc. Control to prevent the necessary steps for shooting.

  According to the X-ray apparatus of this example, the identity of the reserved subject and the imaging subject P is determined using the vein pattern of the subject as identification information and using the vein pattern scanner 26C and the determination means 27. For this reason, it is possible to significantly reduce the difference between the subjects.

  In the above embodiment, the vein pattern scanner 26C is connected to the main body 2 with a cord, but instead, the vein pattern scanner 26C may be fixed to the X-ray generation unit 3 (such as the side surface of the X-ray diaphragm 32) ( (See broken line in FIG. 6). According to this configuration, by moving the X-ray generator 3, the vein pattern scanner 26C can be moved within the reach of the subject P, thereby easily providing the vein pattern of the subject P. Can be acquired.

[Embodiment 4: Barcode Reader]
Next, an embodiment of the present invention in which the ID information of a subject is displayed as a non-biometric identification information in a barcode and the information acquisition means is a barcode reader will be described with reference to FIG. Also in the present embodiment, the basic configuration and operation procedure of the X-ray apparatus are the same as those in the first embodiment except that the personal identification information and the acquisition means are different. Hereinafter, differences from the first embodiment will be mainly described.

  In this example, among the patient data acquired from the RIS server, predetermined data such as an ID number is displayed on a card or the like with a barcode, and this card (not shown) is attached to the imaging subject P. For example, a card printed with a barcode is hung with a string or the like on the wrist or ankle of the subject P. On the other hand, a handy type barcode reader 26D connected to the main body 2 by a cord is used as the acquisition means 26. The identity determination between the reserved subject and the photographic subject P is performed by reading the barcode of the card with the barcode reader 26D and comparing the read data with the master information stored in the storage means 29. Do.

  As a result of the determination, if it is determined that the imaging subject P is the same as the reserved subject, the X-ray generator 3 is moved to the region of interest of the imaging subject P, and predetermined imaging conditions are set. Set and take a picture. Conversely, if it is determined that the subject P is not the same as the scheduled subject, a warning is displayed on the monitor 28 indicating that the subject has been mistaken, and setting of the imaging conditions, etc. Control to prevent the necessary steps for shooting.

  According to the X-ray apparatus of this example, the ID information recorded in the barcode is used as the identification information, and the identity of the reserved subject and the imaging subject is determined using the barcode reader 26D and the determination means 27. Therefore, it is possible to significantly reduce the difference between the subjects.

[Embodiment 5: ID card reader]
Next, an embodiment of the present invention in which the ID information of the subject is stored in the ID card as the non-biometric identification information and the information acquisition means is an ID card reader will be described with reference to FIG. Also in the present embodiment, the basic configuration and operation procedure of the X-ray apparatus are the same as those in the first embodiment except that the personal identification information and the acquisition means are different. Hereinafter, differences from the first embodiment will be mainly described.

  In this example, among the patient data acquired from the RIS server, predetermined data such as an ID number is recorded on an ID card (not shown), and this card is attached to the imaging subject P. For example, it is hung on the wrist, ankle, etc. of the subject P with an ID card string or the like. On the other hand, as the acquisition means 26, a handy type ID card reader 26E connected to the main body 2 by a cord is used. The card reader 26E can read the recorded data of the card, for example, by inserting an ID card into the slit. The identity determination between the reserved subject and the photographic subject P is performed by reading the card data with the ID card reader 26E and comparing the read data with the master information stored in the storage means 29. .

  As a result of the determination, if it is determined that the imaging subject P is the same as the reserved subject, the X-ray generator 3 is moved to the region of interest of the imaging subject P, and predetermined imaging conditions are set. Set and take a picture. Conversely, if it is determined that the subject P is not the same as the scheduled subject, a warning is displayed on the monitor 28 indicating that the subject has been mistaken, and setting of the imaging conditions, etc. Control to prevent the necessary steps for shooting.

  According to the X-ray apparatus of this example, ID information recorded on the ID card is used as identification information, and the identity of the reserved subject and the imaging subject is determined using the ID card reader 26E and the determination means 27. Therefore, the difference of the subject P can be reduced significantly.

  In this embodiment, the handy type ID card reader 26E connected to the main body 2 with a cord is used, but instead, the ID card reader 26E may be fixed to the main body or the X-ray generation unit 3. In that case, the ID card attached to the subject is held up to the position of the ID card reader 26E to perform reading.

  The mobile X-ray apparatus of the present invention can be suitably used for taking an X-ray image during a round visit.

It is a schematic block diagram of the mobile X-ray apparatus shown in Embodiment 1 of this invention. It is a functional block diagram of the mobile X-ray apparatus of FIG. It is a schematic block diagram of the X-ray aperture in the mobile X-ray apparatus of FIG. It is a flowchart which shows the operation processing procedure of the mobile X-ray apparatus of FIG. It is a schematic block diagram of the mobile X-ray apparatus shown in Embodiment 2 of this invention. It is a schematic block diagram of the mobile X-ray apparatus shown in Embodiment 3 of this invention. It is a schematic block diagram of the mobile X-ray apparatus shown to Embodiment 4 and 5 of this invention.

Explanation of symbols

1 Moving cart
2 Main unit 20 Operation panel 21 Shooting control means 22 High pressure generator
23 Travel control lever 24 Travel control means 25 Motor 26 Acquisition means
26A TV camera 26B Fingerprint scanner 26C Vein scanner
26D Bar code reader 26E ID card reader 27 Judgment means
28 Monitor 29 Memory means
3 X-ray generator 31 X-ray tube 32 X-ray diaphragm
32A, 32B Conical blades 32C, 32D Upper blade 32E, 32F Out-of-focus X-ray reduction blade
32G 1st mirror 32H 2nd mirror
4 Support mechanism 41 Post 42 Arm
5 X-ray detector
P Subject (photographed subject)

Claims (1)

An X-ray generator that irradiates a subject with X-rays, a main body that supports the X-ray generator via a support mechanism, and a movable carriage that travels the main body, and that passes through the subject. A mobile X-ray apparatus that takes an X-ray image using
Storage means for storing identification information of a reserved subject for which imaging is reserved as master information;
An acquisition means for acquiring identification information of a subject to be actually photographed;
In the mobile X-ray apparatus comprising the determination means for collating the acquired identification information with the master information, determining whether the imaging subject is the same as the reserved subject, and outputting the determination result,
The identification information is non-biometric identification information of the subject,
The non-biometric information in ID information of a subject indicated by the bar code, the bar code is attached to the subject, wherein the acquisition means Ri Oh a bar code reader,
The mobile X-ray apparatus is characterized in that the bar code reader is of a handy type and is connected to the X-ray generator via a cord .

Images