JP2010017457A - Medical diagnostic imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medical diagnostic imaging device which can decrease an examination time and a labor hour of an operator, to relieve physical and mental burden of a subject and additionally to suppress mental burden of a female subject. <P>SOLUTION: The medical diagnostic imaging device includes: a bed 2A which has a top board 2a on which the subject M is placed, a support frame 23 which is movably arranged in a housing frame 21 and supports the top board 2a, a support roller 24 which is arranged in the housing frame 21 and supports the top board 2a, a first load detector 25 which is arranged between the top board 2a and the support frame 23 and a second load detector 26 which is arranged between the support roller 24, and the housing frame 21; and a means for finding the weight of the subject M by calculating the difference in load by presence and absence of the subject M by using a first load and a second load which are detected with the subject M not being placed on the top board 2a and a first load and a second load which are detected with the subject M being placed on the top board 2a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a medical image diagnostic apparatus, and more particularly to a medical image diagnostic apparatus that captures a medical image.

  The medical image diagnostic apparatus is an apparatus for taking a medical image and using it for diagnosis. As this medical image diagnostic apparatus, an X-ray CT apparatus (X-ray tomography) that acquires and reconstructs projection data obtained as a result of irradiating a subject with X-rays from multiple directions and acquires a tomographic image of the subject. Apparatus), a fluoroscopic imaging apparatus, and the like (for example, see Patent Document 1).

In such a medical image diagnostic apparatus, a contrast agent is applied to a subject (for example, a patient, a subject, etc.) in order to take an image by contrasting an image or enhancing a specific tissue during image diagnosis. It has been administered. The amount of contrast medium administered to the subject can be calculated from the body weight of the subject, and the weight measurement of the subject is often performed in advance of imaging using a scale.
JP-A-9-56711

However, measuring the body weight using a weight scale before photographing has the following three problems.
1. The inspection time is long and the labor of the technician is great.
2. The physical and mental burden on the subject is large.
3. Mental burden is placed on female subjects who tend to care about weight.

  The shorter the throughput from the time when the subject enters the laboratory to the time when the patient takes a picture and leaves the laboratory, the best in terms of time efficiency. In the flow, the body weight is measured by a scale before photographing. The engineer needs to guide the subject to the weight scale and then place the subject on the weight scale, and then guide the subject to the medical diagnostic imaging apparatus and place it on the bed. For this reason, the inspection time per person becomes longer, and further, the labor of the engineer increases.

  Moreover, weight measurement with a weight scale is a physical burden for a subject who is injured or who is physically disabled or weak in physical strength due to age. In particular, weight measurement that is unreasonable for a bedridden subject who cannot stand on a weight scale and a subject who is seriously ill increases the physical burden.

  Here, if the subject is a hospitalized patient or a hospitalized patient, the weight of the subject is regularly measured and stored in the database, but the weight depends on the daily physical condition. It will change. Therefore, it is desirable to calculate the optimum amount of contrast medium used (contrast medium volume) from the exact body weight measured on the day of the examination, particularly immediately before the examination.

  For example, since the amount of contrast medium used is small, performing a reexamination without obtaining a desired image has a risk of excessive exposure for the subject. On the contrary, since the amount of contrast medium used is excessive, side effects (nausea, itching, urticaria, etc.) may occur due to the contrast medium. In any case, if the optimal amount of contrast medium used is not administered to the subject, the physical burden on the subject will increase.

  In addition, the subject basically has a desire to complete the imaging examination in a short time and does not want to stay in the examination room. Although there are individual differences, the subject feels mental stress, and thus receives a mental burden.

  Also, many female subjects are unwilling to know their weight by others, even if they are engineers. Therefore, even when a direct physical burden is small, at least a mental stress is felt, so that a mental load is applied.

  The present invention has been made in view of the above, and the purpose thereof is to reduce the examination time and the labor of the technician, and further reduce the physical and mental burden on the subject. In addition, it is an object of the present invention to provide a medical diagnostic imaging apparatus that can suppress the mental burden of a female subject.

  The medical image diagnostic apparatus according to claim 1 is characterized in that, in the medical diagnostic imaging apparatus, the storage frame, a support frame that is positioned at one of both ends of the storage frame and is movable in the storage frame along the storage frame, A support roller positioned on the other end of the frame and rotatably provided in the moving direction of the support frame in the housing frame, and fixed to the support frame on the support frame and the support roller. Provided between the top plate and the top plate and the support frame, and provided between the first load detector for detecting the first load, the support roller and the housing frame, and receiving the second load. A bed having a second load detector for detection; a first load and a second load detected in a state where the subject is not placed on the top plate; and the subject placed on the top plate State By using the first load and the second load detected, and calculates the load difference by presence or absence of the object relative to the top plate is to and means for determining the weight of the subject.

  According to a second aspect of the present invention, in the medical image diagnostic apparatus, a bed having a movable top plate on which a subject is placed, and a floor on which the bed is installed are positioned at one of both ends of the bed. A third load detector for detecting a third load by placing the bed, and a floor surface on which the bed is installed, positioned at the other end of the bed, and the bed is placed A fourth load detector for detecting a fourth load; a third load and a fourth load detected when the subject is not placed on the top; and the subject placed on the top Means for calculating a load difference depending on the presence / absence of the subject with respect to the top board using the third load and the fourth load detected in a state in which the subject is in a state of obtaining the weight of the subject. .

  According to a third aspect of the present invention, in the medical diagnostic imaging apparatus, a bed having a movable top plate on which the subject is placed and a floor on which the bed is installed are provided, and the bed is placed. A fifth load detector that is placed and detects a fifth load; a fifth load that is detected when the subject is not placed on the top plate; and a subject that is placed on the top plate And a means for calculating a load difference depending on the presence or absence of the subject with respect to the top board using the fifth load detected in a state where the weight of the subject is obtained.

  According to the present invention, the examination time can be shortened and the labor of the engineer can be reduced, and the physical and mental burden of the subject can be reduced. In addition, the female subject Therefore, it is possible to provide a medical image diagnostic apparatus that can suppress the mental burden of the above.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the medical image diagnostic apparatus 1 according to the first embodiment of the present invention includes a bed 2A on which a subject M such as a patient or a subject is placed, and a subject M on the bed 2A. On the other hand, an imaging unit 3 that performs an imaging operation for imaging a medical image and a control device 4 that controls each unit such as the bed 2A and the imaging unit 3 are provided. Examples of the medical image diagnostic apparatus 1 include an X-ray CT apparatus (X-ray tomography apparatus) that performs tomography of a medical image of a subject M.

  The bed 2A includes a top plate 2a on which the subject M is placed, a horizontal movement mechanism 2b that supports the top plate 2a and moves it horizontally, and a vertical movement of the top plate 2a via the horizontal movement mechanism 2b. And a vertical movement mechanism 2c to be moved. The couch 2A moves the top 2a by the horizontal movement mechanism 2b and the vertical movement mechanism 2c, and positions the subject M on the top 2a at a predetermined position.

  The top plate 2a is formed, for example, in a rectangular shape so that the subject M can be placed on its side, and is provided on the horizontal movement mechanism 2b so as to be movable in the horizontal direction. The horizontal movement direction of the top 2a is a protruding direction (left direction in FIG. 1) protruding toward the photographing unit 3 and a return direction (right direction in FIG. 1) returning from the photographing unit 3 to the original position. There are two directions. Note that the protruding direction is a proximity direction in which the top plate 2 a approaches the imaging unit 3, and the return direction is a separation direction in which the top plate 2 a is separated from the imaging unit 3.

  The horizontal movement mechanism 2b is a mechanism that supports the top plate 2a so as to be movable in the horizontal direction, that is, the protruding direction and the return direction, and moves the top plate 2a in the protruding direction and the return direction. The horizontal movement mechanism 2b is formed in a structure capable of cantilevering the top plate 2a moving in the horizontal direction. The vertical movement mechanism 2c is a mechanism that supports the horizontal movement mechanism 2b and moves it in the vertical direction.

  As shown in FIG. 2, the horizontal movement mechanism 2 b is movable in the housing frame 21, a housing frame 21 as a housing structure serving as a housing, a pair of rails 22 provided in the housing frame 21, and the housing frame 21. A support frame 23 that is provided as a support structure that supports the top plate 2a, and a support roller 24 that is provided in the housing frame 21 and supports the top plate 2a so that the top plate 2a can be moved according to the movement of the support frame 23. And a first load detector 25 provided between the top plate 2a and the support frame 23 for detecting a first load, and provided between the support roller 24 and the housing frame 21 to detect a second load. And a second load detector 26.

  The housing frame 21 is formed in a rectangular parallelepiped box shape, for example. The pair of rails 22 are provided on the bottom surface of the housing frame 21 in parallel along the longitudinal direction, that is, the protruding direction and the return direction. These rails 22 guide the support frame 23 in the protruding direction and the returning direction.

  The support frame 23 is positioned and provided at one of the both ends of the accommodation frame 21 (the right end in FIG. 2). The support frame 23 is a travel frame that moves horizontally along the housing frame 21, that is, the pair of rails 22, by a moving mechanism (not shown) having a drive motor, a belt, and the like. A top plate 2 a is fixed to the support frame 23, and the top plate 2 a moves as the support frame 23 moves.

  Here, an encoder as a position detector is provided in the drive motor for moving the support frame 23, and the encoder is used for feedback control. The control device 4 can grasp the position of the support frame 23, that is, the top plate 2a from the value of the encoder.

  The support roller 24 is positioned at the other end (the left end in FIG. 2) of both ends of the storage frame 21, and a plurality of support rollers 24 are provided to be rotatable in the moving direction of the support frame 23. These support rollers 24 are located at the end of the housing frame 21 and support the tip of the top plate 2a. The plurality of support rollers 24 are provided in an arrangement capable of maintaining a horizontal balance such as three-point support.

  The first load detector 25 is a load converter called a load cell that converts a load into an electrical signal. The first load detector 25 is placed on the support frame 23 to support the top plate 2 a and is electrically connected to the control device 4.

  The second load detector 26 is also a load converter called a load cell that converts a load into an electric signal. The same number of second load detectors 26 as the number of support rollers 24 are fixed to the bottom surface of the housing frame 21 and are electrically connected to the control device 4. Support rollers 24 are rotatably mounted on these second load detectors 26, respectively.

  Here, the load converter is a device that amplifies an electric signal from a sensor (load cell) whose resistance value changes due to a slight distortion of the metal due to force or weight, and converts the load into an electric signal. As the load transducer, for example, a strain gauge type load transducer, a compression type (button or diaphragm) load cell, a tension / compression type (bilateral type) load cell, a beam type load cell, a cantilever beam type load cell, or the like is used.

  Returning to FIG. 1, the imaging unit 3 is irradiated with an X-ray irradiation unit 3a that irradiates X-rays, a high voltage generation unit 3b that generates a high voltage to be supplied to the X-ray irradiation unit 3a, and an X-ray irradiation unit 3a. X-ray detector 3c for detecting the emitted X-ray, data collection unit 3d for collecting projection data detected by X-ray detector 3c, X-ray irradiator 3a and X-ray detector 3c are opposed to each other. And a frame 3e that is rotatably supported.

  The X-ray irradiation unit 3 a includes an X-ray tube 11 that emits X-rays and a diaphragm unit 12 such as a collimator that narrows the X-rays emitted from the X-ray tube 11. The X-ray irradiation unit 3a is provided inside the gantry 3e. Such an X-ray irradiation unit 3a emits X-rays by the X-ray tube 11, squeezes the X-rays by the throttle unit 12, and irradiates the subject M on the top plate 2a of the bed 2A.

  The high voltage generator 3b is positioned in the vicinity of the X-ray irradiator 3a and is provided inside the gantry 3e. The high voltage generation unit 3b is a device that generates a high voltage to be supplied to the X-ray irradiation unit 3a. The high voltage generation unit 3b boosts and rectifies the voltage supplied from the control device 4, and supplies the voltage to the X-ray irradiation unit 3a. . Note that the control device 4 controls various conditions such as the waveform of the voltage applied to the high voltage generator 3b, that is, the amplitude and the pulse width, in order to cause the X-ray irradiation unit 3a to generate desired X-rays.

  The X-ray detection unit 3c is provided inside the gantry 3e so as to face the X-ray irradiation unit 3a. The X-ray detection unit 3c converts X-ray projection information obtained from X-rays transmitted through the subject M on the top 2a of the bed 2A into optical information, and converts the optical information into electrical signals to collect data. Transmit to unit 3d.

  The data collection unit 3d is positioned in the vicinity of the X-ray detection unit 3c and is provided inside the gantry 3e. The data collection unit 3d collects the electrical signals transmitted from the X-ray detection unit 3c as projection data and transmits the projection data to the control device 4.

  The gantry 3e is formed in a cylindrical shape and has a through hole H into which the top plate 2a of the bed 2A is inserted for the examination of the subject M. The gantry 3 e faces the X-ray irradiation unit 3 a and the X-ray detection unit 3 c so as to sandwich the through-hole H, and further supports the periphery of the through-hole H to be rotatable.

  The control device 4 includes a control unit 4a that controls each unit, an image processing unit 4b that performs image processing including image reconstruction based on projection data, a storage unit 4c that stores various data and various programs, and an input operation performed by an operator. An operation unit 4d for receiving the image, a display unit 4e for displaying an image, and the like. These parts 4a to 4e are electrically connected by a bus line 4f.

  The control unit 4a controls each unit such as the horizontal movement mechanism 2b, the vertical movement mechanism 2c, and the high voltage generation unit 3b. In addition, the control unit 4a collects the first load detected by the first load detector 25, the second load detected by the second load detector 26, etc., or the ceiling detected by the encoder. The movement amount (horizontal movement amount and vertical movement amount) of the plate 2a is collected, or the weight of the subject M and a medical image are displayed on the display unit 4e.

  Here, when the weight of the subject as the subject M is measured, the control unit 4a includes the first load and the second load detected in a state where the subject is not lying on the top 2a, Using the first load and the second load detected while the subject is sleeping on the top plate 2a, a load difference depending on the presence or absence of the subject with respect to the top plate 2a is calculated, and the subject's Find your weight. That is, the control unit 4a obtains the weight of the top plate 2a by adding the first load and the second load detected when the subject is not lying on the top plate 2a, and the weight of the top plate 2a. Is previously stored in the storage unit 4c. Thereafter, when the subject lies on the top plate 2a, the first load and the second load detected in a state where the subject lies on the top plate 2a are added, and from the values, the above-described values are added. The weight of the subject 2 is obtained by subtracting the weight of the top 2a.

  The image processing unit 4b performs image processing including image reconstruction on the projection data transmitted from the data collecting unit 3d, and then stores the medical image via the storage unit 4c or another storage device connected via the network. Save to. For example, an array processor or the like is used as the image processing unit 4b.

  The storage unit 4c is a storage device that stores various programs, various data, and the like. In particular, information used for measuring the weight of the subject M as various data (for example, weight information regarding the weight of the top 2a described above). And a medical device that stores medical images taken. For example, ROM, RAM, flash memory, and hard disk are used as the storage unit 4c.

  The operation unit 4d is an input unit that is input by an operator. For example, a keyboard or a mouse is used as the operation unit 4d. The operator performs an input operation on the operation unit 4d and performs imaging by the imaging unit 3, or selects and displays a desired medical image from a plurality of reconstructed medical images.

  The display unit 4e is a display device that displays various images such as a medical image of the subject M and an operation screen. As the display unit 4e, for example, a liquid crystal display, a CRT (CRT) display, or the like is used. The display unit 4e is provided in the operator room adjacent to the examination room (imaging room) where the bed 2A and the imaging unit 3 are located together with the operation unit 4d and the like. The weight of the subject is displayed on the display unit 4e in the examination room, but is not limited to this. For example, the subject is positioned outside the visual field range of the subject while sleeping on the bed 2A. You may make it display on the display part (For example, the display part which displays the image for user navigation etc.) provided in the examination room.

  Next, the weight measurement operation performed by the medical image diagnostic apparatus 1 will be described. In addition, the control part 4a of the medical image diagnostic apparatus 1 performs a weight measurement process based on various programs and various information.

  As shown in FIG. 3, the control unit 4a determines whether or not the top plate 2a is in the movement initial position (step S1), and determines that the top plate 2a is not in the movement initial position (step S1). NO), the process returns to step S1. On the other hand, if it is determined that the top plate 2a is in the initial position of movement (YES in step S1), it is determined whether the load has increased and is stable (step S2), and the load has increased and is stable. If it is determined that there is not (NO in step S2), the process returns to step S1. On the other hand, when it is determined that the load has increased and stabilized (YES in step S2), the weight of the subject M is obtained using the detected load (step S3), and the obtained weight of the subject M is displayed. (Step S4).

  First, the engineer guides the subject who is the subject M to the bed 2A and lays it on the top plate 2a of the bed 2A. At this time, the top plate 2a is at an initial movement position (position in FIG. 2) as a standby position. Further, the top plate 2a is moved in the vertical direction by the vertical movement mechanism 2c, and is positioned at a height at which the subject can easily get on and off the floor.

  The subject lies on the top 2a. At this time, the detected load increases, and the detected load is stabilized when the subject is completely asleep and no vibration occurs. When the detected load is stabilized, the first load and the second load detected while the subject is lying on the top plate 2a are added, and the weight of the top plate 2a is read from the storage unit 4c. The weight of the top 2a is subtracted from the added value, and the weight of the subject is obtained. Thereafter, the weight of the subject M is displayed on the display unit 4e.

  The engineer visually recognizes the body weight displayed on the display unit 4e, and obtains the optimum amount of contrast medium used (contrast medium amount) from the body weight. Here, the weight of the subject is displayed on the display unit 4e. However, the present invention is not limited to this. For example, the control unit 4a determines the optimal contrast agent usage amount from the subject's weight using a predetermined calculation formula ( For example, it may be calculated by a calculation formula that determines the optimum contrast usage amount for each predetermined body weight range, and the calculated optimal contrast agent usage amount may be displayed on the display unit 4e.

  Thereafter, an optimal amount of contrast agent is administered to the subject lying on the top 2a, and an imaging operation is performed. The operation unit 4d is input by the engineer, and an instruction to start the imaging operation is given. In response to this, the medical image diagnostic apparatus 1 moves the top plate 2a on which the subject is placed in the protruding direction by the horizontal movement mechanism 2b and inserts the top plate 2a into the through hole H of the gantry 3e. The subject is moved in the body axis direction. The top plate 2a is moved in the vertical direction by the vertical movement mechanism 2c and is positioned at a height at which it can be inserted into the through hole H from the floor surface.

  Along with the movement of the top plate 2a, the medical image diagnostic apparatus 1 rotates the X-ray irradiation unit 3a and the X-ray detection unit 3c of the imaging unit 3 around the subject on the top plate 2a while rotating the X-ray irradiation unit 3a. The X-ray beam is irradiated to the subject on the top 2a by the X-ray irradiation unit 3a, and the X-ray beam transmitted through the subject is detected by the X-ray detection unit 3c. At this time, the medical image diagnostic apparatus 1 collects electrical signals from the X-ray detection unit 3c as projection data by the data collection unit 3d, processes the projection data by the image processing unit 4b, and displays the processed medical image. The information is displayed on the unit 4e and further stored in the storage unit 4c.

  Immediately before performing the imaging operation in this way, a weight measurement operation is performed, and when the subject is laid on the top 2a, the weight of the subject has already been measured. This eliminates the action of placing on a scale to measure the weight, so that the amount of contrast medium can be calculated quickly, and the examination time can be shortened. In addition, the technician does not need to guide the subject to the weight scale and place it on the weight scale, and further to guide the subject onto the top plate 2a of the bed 2 to lie down, so that the labor of the engineer can be reduced.

  Further, since the body weight is measured while the subject is sleeping on the top board 2a, it is possible to proceed to imaging as it is, so that the throughput is improved and the examination time can be shortened. Furthermore, at the same time that the subject sleeps on the top board 2a, the engineer determines the amount of contrast medium used from the obtained body weight of the subject and starts preparation of the contrast medium to be administered to the subject. Therefore, the inspection time can be shortened more reliably.

  In addition, since the body weight measurement is performed without using a scale, it is possible to reduce the physical burden on a subject who is injured or who is physically disabled or who is weak due to aging. In particular, the physical burden on a bedridden subject who cannot stand on a weight scale and a subject in a serious state can be reduced.

  Furthermore, without using a scale, it is possible to calculate the optimal contrast medium usage from the exact body weight immediately before the examination, and the contrast medium with the optimal contrast medium usage is administered to the subject. Reduce physical burden on subjects caused by inappropriate doses of contrast media such as exposure due to re-examination caused by low usage of contrast media and side effects caused by high usage of contrast media be able to.

  In addition, shortening the examination time can minimize the stress of the subject who does not want to stay in the examination room although there are individual differences, and can reduce the mental burden on the subject. Furthermore, since the female subject is not aware that the weight measurement is performed and is not subjected to excessive stress, the mental burden on the female subject can be suppressed.

  As described above, according to the first embodiment of the present invention, the first load detector 25 provided between the top plate 2a and the support frame 23, the support roller 24, the storage frame 21, and the like. A second load detector 26 provided between the first load and the second load detected in a state where the subject M is not placed on the top plate 2a, and the subject M is the top plate. Using the first load and the second load detected in the state of being placed on 2a, the load difference due to the presence or absence of the subject M with respect to the top 2a is calculated, and the weight of the subject M is obtained. Thus, when the subject as the subject M is laid on the top 2a, the weight of the subject has already been measured.

  As a result, the act of placing on a weight scale in order to measure the body weight is omitted, so that the inspection time can be shortened and the labor of the engineer can be reduced. Moreover, since the weight measurement is performed without using the scale, it is possible to reduce the physical burden on the subject in various states. In addition, it is possible to measure the correct body weight immediately before the examination without using a scale, and to calculate the optimal amount of contrast medium used. Can reduce the physical burden.

  In addition, since the examination time is shortened, the mental stress of the subject who does not want to stay in the laboratory although there are individual differences can be minimized and the mental burden of the subject can be reduced. . Furthermore, since the female subject is not aware that the weight measurement is performed and is not subjected to excessive stress, the mental burden on the female subject can be suppressed.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIG.

  The second embodiment of the present invention is basically the same as the first embodiment. Therefore, in the second embodiment, only parts different from the first embodiment will be described. In the second embodiment, description of the same parts as those described in the first embodiment is omitted.

  As shown in FIG. 4, in the bed 2B according to the second embodiment of the present invention, instead of the first load detector 25 and the second load detector 26 according to the first embodiment, A third load detector 27 for detecting the third load and a fourth load detector 28 for detecting the fourth load are provided.

  Similar to the first load detector 25 and the second load detector 26 according to the first embodiment, the third load detector 27 and the fourth load detector 28 convert the load into an electrical signal. It is a load transducer called a load cell. The third load detector 27 and the fourth load detector 28 are provided on the floor surface on which the bed 2B is installed, and are electrically connected to the control unit 4a. The third load detector 27 is positioned at one end (the left end portion in FIG. 4) of the bed 2B in the moving direction of the top plate 2a, and the fourth load detector 28 is the other end ( It is positioned at the right end in FIG. The bed 2B is placed on the third load detector 27 and the fourth load detector 28.

  When the weight of the subject as the subject M is measured, the control unit 4a detects the third load and the fourth load detected when the subject is not lying on the top 2a, and the subject. Using the third load and the fourth load detected in the state of sleeping on the top plate 2a, a load difference according to the presence or absence of the subject with respect to the top plate 2a is calculated, and the weight of the subject is obtained. . That is, the control unit 4a obtains the weight of the bed 2B by adding the third load and the fourth load detected when the subject M is not lying on the top 2a, and determines the weight of the bed 2B in advance. Stored in the storage unit 4c. When the subject lies on the top plate 2a, the third load and the fourth load detected in a state where the subject lies on the top plate 2a are added, and the above-described bed 2B is calculated from the value. The weight of the subject is subtracted to obtain the weight of the subject.

  As described above, according to the second embodiment of the present invention, the same effect as in the first embodiment can be obtained. In particular, even when the weight measurement function is retrofitted, it is necessary to perform an act of disassembling the horizontal movement mechanism 2b in order to provide the first load detector 25 and the second load detector 26 according to the first embodiment. The third load detector 27 and the fourth load detector 28 can be easily provided.

(Third embodiment)
A third embodiment of the present invention will be described with reference to FIG.

  The third embodiment of the present invention is basically the same as the first embodiment. Therefore, in the third embodiment, parts different from the first embodiment will be described. In the third embodiment, description of the same parts as those described in the first embodiment is omitted.

  As shown in FIG. 5, in the bed 2C according to the third embodiment of the present invention, instead of the first load detector 25 and the second load detector 26 according to the first embodiment, A fifth load detector 29 for detecting the five loads is provided.

  Similar to the first load detector 25 and the second load detector 26 according to the first embodiment, the fifth load detector 29 is a load converter called a load cell that converts a load into an electrical signal. . The fifth load detector 29 is embedded in the floor on which the bed 2C is installed and is electrically connected to the control unit 4a. The bed 2 </ b> C is placed on the fifth load detector 29. The fifth load detector 29 is formed so that the exposed area from the floor is larger than the placement surface on which the vertical movement mechanism 2c of the bed 2C is placed.

  When the weight of the subject as the subject M is measured, the control unit 4a detects the fifth load detected when the subject is not lying on the top 2a, and the subject is placed on the top 2a. Using the fifth load detected in the sleeping state, a load difference due to the presence or absence of the subject with respect to the top 2a is calculated, and the weight of the subject is obtained. That is, the control unit 4a obtains the fifth load detected when the subject M is not lying on the top 2a as the weight of the bed 2C, and stores the weight of the bed 2C in the storage unit 4c in advance. . When the subject lies on the top plate 2a, the fifth load detected while the subject lies on the top plate 2a is obtained, and the weight of the bed 2C is subtracted from that value. Determine the weight of the subject.

  As described above, according to the third embodiment of the present invention, the same effect as in the first embodiment can be obtained. In particular, even when the weight measurement function is retrofitted, it is necessary to perform an act of disassembling the horizontal movement mechanism 2b in order to provide the first load detector 25 and the second load detector 26 according to the first embodiment. The fifth load detector 29 can be easily provided. Here, the fifth load detector 29 is buried in the floor surface and exposed. However, the present invention is not limited to this. For example, the fifth load detector 29 may be provided on the floor surface without being buried in the floor surface.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, some components may be deleted from all the components shown in the above-described embodiment. Furthermore, you may combine the component covering different embodiment suitably.

1 is a schematic diagram showing a schematic configuration of a medical image diagnostic apparatus according to a first embodiment of the present invention. It is sectional drawing which shows schematic structure of the bed with which the medical image diagnostic apparatus shown in FIG. 1 is provided. It is a flowchart which shows the flow of the weight measurement operation | movement which the medical image diagnostic apparatus shown in FIG. 1 performs. It is sectional drawing which shows schematic structure of the bed with which the medical image diagnostic apparatus which concerns on the 2nd Embodiment of this invention is provided. It is sectional drawing which shows schematic structure of the bed with which the medical image diagnostic apparatus which concerns on the 2nd Embodiment of this invention is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Medical diagnostic imaging apparatus 2A Sleeper 2B Sleeper 2C Sleeper 2a Top plate 3 Imaging | photography part 4e Display part 21 Accommodating frame 23 Support frame 24 Support roller 25 1st load detector 26 2nd load detector 27 3rd load detector 28 Fourth load detector 29 Fifth load detector M Subject

Claims (5)

A containment frame;
A support frame that is positioned at one of both ends of the housing frame and is provided in the housing frame so as to be movable along the housing frame;
A support roller positioned on the other end of the storage frame and provided rotatably in the storage frame in the moving direction of the support frame;
A top plate provided on the support frame and the support roller and fixed to the support frame, on which the subject is placed,
A first load detector provided between the top plate and the support frame for detecting a first load;
A second load detector provided between the support roller and the housing frame for detecting a second load;
A bed having
The first load and the second load detected in a state where the subject is not placed on the top plate, and the state detected in a state where the subject is placed on the top plate Means for calculating a load difference due to the presence or absence of the subject with respect to the top board using the first load and the second load, and obtaining a weight of the subject;
A medical image diagnostic apparatus comprising: A bed having a movable top plate on which the subject is placed;
A third load detector, which is provided on one of both ends of the bed on the floor on which the bed is installed, and detects the third load by placing the bed;
A fourth load detector which is provided on the floor on which the bed is placed and is positioned on the other end of the bed, and on which the bed is placed to detect a fourth load;
The third load and the fourth load detected in a state where the subject is not placed on the top plate, and the state detected in a state where the subject is placed on the top plate Means for calculating a load difference due to the presence or absence of the subject with respect to the top board using a third load and the fourth load, and obtaining a weight of the subject;
A medical image diagnostic apparatus comprising: A bed having a movable top plate on which the subject is placed;
A fifth load detector that is embedded in the floor on which the bed is installed and that detects the fifth load by placing the bed;
The fifth load detected in a state where the subject is not placed on the top plate and the fifth load detected in a state where the subject is placed on the top plate A means for calculating a load difference due to the presence or absence of the subject with respect to the top board, and obtaining a weight of the subject;
A medical image diagnostic apparatus comprising:   The determining means determines whether or not the top plate is at an initial movement position on the bed, and determines the weight of the subject when it is determined that the top plate is at the initial movement position on the bed. The medical image diagnostic apparatus according to claim 1, wherein the medical image diagnostic apparatus is a medical image diagnostic apparatus.   The medical image diagnostic apparatus according to claim 1, further comprising a display unit configured to display the weight of the subject obtained by the obtaining unit.

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