JP5250705B2 - Radiation diagnostic equipment - Google Patents

Description

  The present invention relates to a radiation diagnostic apparatus that inspects a subject with a radiation beam.

  In a radiation diagnostic apparatus that performs measurement and imaging by irradiating a subject with radiation such as X-rays, in order to appropriately measure the measurement range of the subject and reduce exposure outside the measurement range, It is necessary to position the subject correctly.

  Therefore, for example, in the conventional X-ray bone mineral content (bone density) measuring apparatus illustrated in FIG. 12, the outer peripheral line 112 and the center line 114 of the measurement range are drawn on the top plate 110 of the main body 100.

  In this apparatus, the main body 100 is inserted under a test bed called a bucky table (see, for example, FIG. 3), and an X-ray generator in the main body unit 100 is applied to a subject sleeping on a bucky table, for example. The X-ray beam in the shape of a rectangular slit extending in the longitudinal direction of the detection unit 120 is irradiated vertically upward, and the transmitted beam is detected by the detection unit 120 positioned above the main body unit 100 (and the subject). . By moving the X-ray generator and the detection unit 120 in a direction perpendicular to the slit surface, it is possible to perform measurement over the entire measurement range. For example, the operator positions the subject with respect to the measurement range while visually recognizing the outer peripheral line 112 and the center line 114 of the measurement range through the transparent top plate of the Bucky table.

  In Patent Document 1, a light emitting member is provided on the upper surface of the X-ray detector so that the operator can find the position of the flat panel X-ray detector under the top board, and a top plate that transmits light is used. A radiation imaging apparatus is disclosed.

  The MRI (magnetic resonance imaging) apparatus disclosed in Patent Document 2 includes an LED that emits a fan-shaped plane light in the lumen of the apparatus, and the MRI of the MRI is formed by the intersection of the LED fan and the patient. Indicates the position of the imaging surface.

  Further, for example, some bone density measuring apparatuses using X-rays transmit X-rays that spread in a fan shape from an X-ray generator to a subject (for example, Patent Document 1).

JP 2005-296449 A JP 2005-517487 A JP 2000-116636 A Japanese Patent No. 3842169

  When a fan-shaped radiation beam is emitted from the radiation generator, the beam width changes according to the distance from the radiation generator, so that it is more difficult to use than a rectangular slit beam that does not change the beam width. It is difficult to correctly position the specimen with respect to the beam irradiation range. For example, the height of the Bucky table varies, and the beam width at the height of the subject lying on the Bucky table varies depending on the height of the Bucky table. For this reason, even if the beam range is indicated on the top plate of the radiation generator, the beam width at the subject's height is not known from the range display, and the subject's measurement is adjusted according to the beam width. It is difficult to position the site.

  An object of the present invention is to facilitate positioning of a bucky table on which a subject is placed in the height direction.

  A radiation diagnostic apparatus according to the present invention includes a radiation generator that irradiates a radiation beam, a radiation detector that is disposed at a distance from the radiation generator and detects the radiation beam, and the radiation generator. A connection member for connecting the radiation generator and the radiation detector on one side of the radiation beam irradiation range, and a subject on the other side of the radiation beam irradiation range of the radiation generator. A radiation diagnostic apparatus in which a space between the radiation generator and the radiation detector is opened so that a bucky table for placing the bucky table is inserted, wherein the connecting member has a height of the bucky table. It is a radiation diagnostic apparatus characterized by having an index indicating a matching standard.

In one aspect, the index represents a reference height of the upper surface of the Bucky table.
In a further aspect, the index represents a horizontal line.

In a further aspect, the shape of the radiation beam when viewed from the one side to the other side is a fan shape. In a further aspect, the indicator is constituted by the light emitting display. It is characterized by being.

In a further aspect, the connecting member has a body thickness index for determining the thickness of the subject placed on the bucky table when the connecting member is viewed from the other side to the one side. It further has these.
In a further aspect, the connecting member further includes a beam shape index indicating a shape of the radiation beam irradiated from the radiation generator when viewed from the other side to the one side. It is characterized by.

  According to the present invention, positioning in the height direction of the bucky table with respect to the radiation diagnostic apparatus is facilitated.

It is a perspective view which shows the state which looked at the X-ray bone mineral content measuring apparatus by which the fan-shaped display line was drawn in the support arm part as an example of the diagonally upper direction. It is a perspective view which shows the state which looked at the X-ray bone mineral content measuring apparatus of FIG. 1 from diagonally downward direction. It is a perspective view which shows the state which looked at the state which inserted the main-body part of the X-ray bone mineral content measuring apparatus of FIG. 1 in the lower part of the Bucky stand from the front side (namely, open end side which inserts a Bucky stand). . It is a figure for demonstrating the positional relationship of a X-ray fan beam and a subject (lumbar vertebra). It is a figure which shows the state which looked at the example of the X-ray bone mineral content measuring apparatus from which the support arm part becomes a fan shape from the front side. It is a figure which shows the state which looked at the example of the X-ray bone mineral content measuring apparatus by which the light emitting element row | line | column which shows a fan shape was arrange | positioned in the support arm part from the front side. It is a figure for demonstrating the flow of the measurement operation | work using the apparatus of FIG. It is a figure which shows an example of the light emission state of the light emitting element row | line | column according to an error kind. It is a figure which shows the example which switches the light emission state of a light emitting element row | line | column according to progress of measurement time. It is a perspective view which shows the example of the X-ray bone mineral content measuring apparatus provided with the light emitting element row | line | column which displays the scanning position of a fine beam. It is a figure which shows the state which looked at the example of the X-ray bone mineral content measuring apparatus provided with the light emitting element row | line | column showing the reference surface of a Bucky table, and the light emitting element row | line | column for determination of a subject thickness from the front side. It is a perspective view of an example of the conventional X-ray bone mineral content measuring apparatus.

  1 to 4 illustrate an X-ray bone mineral content measuring apparatus 10 which is an example of a radiation diagnostic apparatus according to the present invention. Here, an apparatus for measuring the bone mineral content of a human lumbar spine will be described as an example. However, the X-ray bone mineral content measurement apparatus 10 and the radiation diagnostic apparatus according to the present invention are not limited to such an apparatus.

  FIG.1 and FIG.2 is a perspective view which shows the state which looked at the X-ray bone mineral content measuring apparatus 10 from diagonally upward and diagonally downward, respectively. FIG. 3 shows the X-ray bone mineral content measuring apparatus 10 in a state where the main body 12 is inserted into the Bucky table 30 as viewed from the front side (that is, the open end side where the Bucky table is inserted) toward the support arm 16. It is a front view. 4 shows the positional relationship between the position of the lumbar vertebra 42 of the subject 40 and the fan beam emitted from the X-ray generator 20 when the subject (examinee) 40 lies on the Bucky table 30 in the state of FIG. FIG. In the following description, please refer to FIGS.

  As shown in these drawings, the X-ray bone mineral content measuring apparatus 10 is roughly composed of a main body part 12, a detection part 14, and a support arm part 16 that couples them.

  The main body 12 includes an X-ray generator 20. The X-ray generator 20 (see FIG. 4) is disposed under the top plate 13 of the main body 12. A wheel 11 for movement is provided at the lower part of the main body 12, and the operator can push the device 10 to insert the main body 12 under the bucky stand 30 (for example, FIG. 3 and FIG. 4). In this example, the main body 12 is rectangular when viewed from above, and the direction indicated by the arrow A in the drawing parallel to one side of the rectangle is referred to as the “front-rear direction” of the apparatus. This front-rear direction A is perpendicular to the fan surface (fan-shaped plane) of the fan beam 22 (in the figure, the fan-shaped contour is indicated by a broken line) emitted from the X-ray generator 20 toward the detection unit 14. It is also a direction. Further, in the front-rear direction A, the direction toward the support arm portion 16 when viewed from the fan beam 22 is referred to as “rear direction” for convenience and the opposite direction is referred to as “front direction”. Of the rectangular sides of the main body 12 viewed from above, the direction parallel to the side perpendicular to the front-rear direction A is referred to as “left-right direction”, and is represented by an arrow B in the drawing. The left-right direction B is a direction perpendicular to both the front-rear direction A and the vertical direction.

  Although not shown, a height adjustment mechanism is provided in the main body 12, and the overall height of the apparatus 10 can be adjusted by this mechanism. That is, by this mechanism, the main body unit 12 and the detection unit 14 can be moved up and down while maintaining the distance from each other.

  The X-ray generator 20 has a general structure including an X-ray tube and a collimator that defines an irradiation range of X-rays emitted from the X-ray tube. The X-ray generator 20 emits a fan beam 22 that is a thin slit in the front-rear direction A and that spreads in a fan-like shape from the X-ray tube vertically upward in the left-right direction B. In this example, the X-ray generator 20 is positioned in the center of the main body 12 in the left-right direction B, and is movable in the front-rear direction A. That is, in this example, a scanning mechanism that moves the X-ray generator 20 along the front-rear direction A is built in the main body unit 12, and the X-ray generator 20 is moved along the direction A by the scanning mechanism. The fan beam 22 can be scanned along a direction A perpendicular to the fan surface. In FIG. 1, the outline of the range in which the line of intersection between the fan beam 22 and the top surface of the top plate 13 moves by scanning is indicated by a rectangle 19. This rectangle 19 may actually be drawn on the top plate 13. In this case, the operator can position the subject 40 on the Bucky table 30 with respect to the irradiation range of the fan beam 22 by referring to the drawn rectangle 19.

  The support arm portion 16 extends vertically upward from one end portion in the front-rear direction A of the main body portion 12. In this example, the surface 17 on the top plate 13 side of the support arm portion 16 is a surface perpendicular to the front-rear direction A. The support arm unit 16 cantilever-supports the detection unit 14.

  The detection unit 14 is arranged vertically above the main body 12 with a gap from the top plate 13 of the main body 12. The detection unit 14 is cantilevered by the support arm unit 16 and protrudes forward from the upper end of the support arm unit 16 onto the top plate 13 and partially or entirely covers the top of the top plate 13. . The surface of the bottom plate 15 of the detection unit 14 is parallel to the surface of the top plate 13 of the main body 12. The detection unit 14 includes an X-ray detector (not shown). In the case of bone mineral content measurement, the X-ray detector includes a linear array in which a large number of X-ray detection elements are aligned along the left-right direction B. The width of the X-ray detector in the left-right direction B is, for example, not less than the width of the fan beam 22 in the left-right direction B at the height of the X-ray detector. In this example, a scanning mechanism that moves the X-ray detector along the front-rear direction A is built in the detection unit 14. This scanning mechanism detects X-rays in synchronization with the scanning mechanism in the main body 12 so that the X-ray detector is located at a position corresponding to the position in the front-rear direction A of the X-ray generator 20 in the main body 12. Move the vessel. Thereby, the fan beam 22 irradiated from the X-ray generator 20 is detected by the X-ray detector in the detection unit 12 at any scanning position.

  In the apparatus 10 of FIG. 1, the main body portion 12 and the detection portion 14 are arranged vertically in parallel with each other, and both of them are connected by a support arm portion 16 at the end on the rear side in the front-rear direction A. ing. Further, the support arms are not provided at the front end portions of the main body portion 12 and the detection portion 14 and are open ends. The device 10 is inserted into the Bucky table 30 from the open end side.

  As shown in FIG. 3, the X-ray bone mineral content measuring apparatus 10 has a bucky function perpendicular to the longitudinal direction of the bucky table 30 (the direction of the body axis connecting the head and the toes when the subject lies down). It is inserted into the stand 30. In this state, the left-right direction B of the X-ray bone mineral content measuring apparatus 10 is parallel to the longitudinal direction of the bucky table 30. Further, in this state, the top plate of the bucky stand 30 is sandwiched between the main body unit 12 and the detection unit 14. The top plate of the bucky stand 30 may be made of a transparent or translucent material so that a display (rectangular 19 or the like) indicating the scanning range of the fan beam 22 drawn on the top plate 13 of the main body 12 can be seen.

  As shown in FIG. 4, the subject 40 lies on the top plate of the Bucky table 30 along the longitudinal direction of the Bucky table 30, that is, the left-right direction of the apparatus 10. In the example of FIG. 4, the subject 40 lies on his / her back with his head directed to the right in the figure. In this state, it is necessary to adjust the positional relationship between the subject 40 and the apparatus 10 so that the lumbar vertebra 42 of the subject 40 to be measured enters the range of the fan beam 22 without excess or deficiency.

  Therefore, in the X-ray bone mineral content measuring apparatus 10, a pair of guide lines 18 (see FIGS. 1 to 3) is provided on the top plate 13 side of the support arm portion 16, that is, the front surface 17. The pair of guide lines 18 indicate the contour lines on the left and right sides of the fan beam 22 emitted from the X-ray generator 20. That is, when the vertical surface 17 of the support arm portion 16 is viewed from the front (open end) side of the device 10 toward the rear, the fan beam 22 passes between the pair of guide lines 18.

  The guide line 18 may be anything as long as it shows the contour of the fan surface of the fan beam 22. That is, for example, the surface 17 may be drawn with a paint, or may be attached to the surface 17 as a seal.

  For example, the operator inserts the apparatus 10 into the Bucky table 30 as shown in FIG. 4 while the subject 40 is lying on the Bucky table 30. Then, by observing the surface 17 of the support arm portion 16 from the front side of the apparatus 10, it is determined whether or not the portion of the lumbar vertebra 42 of the subject 40 that is the measurement target fits between the pair of guidelines 18 without excess or deficiency. To do. When the portion of the lumbar vertebra 42 is shifted to the left or right in the drawing from the range between the pair of guide lines 18, the operator shifts the device 10 to the left or right or asks the subject 40 to move the device 10 Thus, the position of the lumbar vertebra 42 is made to fit between the pair of guide lines 18. Further, depending on the height of the bucky table 30, the lumbar vertebra 42 of the subject 40 protrudes from the pair of guide lines 18 to both the left and right sides. There is a case. In either case, the amount of bone mineral in the lumbar vertebra 42 cannot be measured correctly, and in the latter case, the exposure of a portion of the subject 40 outside the measurement target is also increased. In such a case, the operator moves the entire apparatus 10 up and down by the height adjustment mechanism of the main body 12 so that the lumbar vertebra 42 fits between the pair of guide lines 18. Note that the height of the bucky stand 30 may be adjusted instead of or in addition to adjusting the height of the apparatus 10.

  As described above, in the example illustrated in FIGS. 1 to 4, a pair of guide lines indicating a contour line when the fan beam 22 is projected rearward along the front-rear direction A on the front surface 17 of the support arm portion 16. 18 was shown. With this guideline 18, the operator can adjust the positional relationship between the subject 40 and the apparatus 10 so that the measurement target portion (lumbar vertebra 42) of the subject 40 fits exactly in the fan beam 22.

  Note that the range of the fan beam 22 is indicated by a pair of guidelines 18 is merely an example. For example, instead of this, the entire range (trapezoid) as well as the outline of the range of the fan beam 22 may be indicated by a different color from the outside of the range.

  Further, as illustrated in FIG. 5, the shape of the support arm portion 16 </ b> A itself may indicate the shape of the fan surface of the fan beam 22 when viewed from the front direction of the device 10.

  Further, as shown in FIG. 6, a guideline indicating the range of the fan beam 22 may be represented by a column 50 of light emitting elements 52 such as LEDs. That is, in the example of FIG. 6, a large number of light emitting elements 52 are arranged on the surface 17 of the support arm portion 16 along the left and right contour lines of the fan surface of the fan beam 22. These light emitting elements 52 emit light upon receiving power supply from a power source in the apparatus 10. Since the surface 17 is a shadow of the inspection unit 14 and is generally dark, it is easy for the operator to view the guideline by displaying the rows 50 of the light emitting elements 52 in this way.

  Further, as the light emitting element 52, a device that can switch the emission color (for example, a device that includes a plurality of LEDs of different colors and selectively emits one or more of the LEDs) is used. May be expressed by the emission color of the column 50. For example, as an example, the measurement preparation state (positioning of the apparatus 10 and the subject 40 is performed in the meantime) and the measurement state (during X-ray irradiation) are expressed by the emission color of the light emitting element 52. In this case, the operation procedure of the apparatus 10 is as shown in FIG. 7, for example.

  That is, in the procedure of FIG. 7, after inserting the apparatus 10 into the Bucky table 30, the operator places the subject 40 on the Bucky table 30 (S10). Next, when the operator presses a measurement preparation switch on an operation panel (not shown) of the apparatus 10, a control device (not shown) in the apparatus 10 sets each light emitting element 52 in the column 50 to the first color. The light is emitted (for example, green) (S12). The operator looks at the first color guideline represented by the light emitting element group 52 from the front side of the apparatus 10 and the measurement site in the body axis direction of the subject 40 (the lumbar vertebra 42 in the example of FIG. 4) is the fan. The relative positional relationship between the subject 40 and the apparatus 10 in the up-down direction and the left-right direction is adjusted so as to fit inside the beam 22 (S14). When the adjustment of the positional relationship is completed, the operator instructs the apparatus 10 to start measurement by turning on a measurement start switch on the operation panel. In response to this instruction, the control device in the apparatus 10 causes the X-ray generator 20 to irradiate the fan beam 22 and causes the X-ray detector in the detection unit 14 to detect the fan beam 22 that has passed through the subject 40 (S16). ). When scanning the fan beam 22 along the front-rear direction A, the control device controls the scanning mechanism in the main body 12 and the inspection unit 14 to synchronize the X-ray generator 20 and the X-ray detector. Is moved along the direction A.

  In the above, the two device states of “preparation for measurement” and “under measurement” are expressed by the light emission state of the color emitted by the light emitting element 52, but another device state is expressed by another light emission state of the light emitting element 52 group. You can also For example, when an error occurs in the apparatus 10 during measurement (during X-ray irradiation), the type of error may be expressed by the light emission state of the light emitting element 52 group. In the example of FIG. 8, the type of error is represented by a temporal blinking pattern of the light emitting element 52. In the example of FIG. 8, for example, when the X-ray tube enters the non-irradiation period, the control device in the device 10 causes the light emitting element 52 to blink in a blinking pattern that turns on and off for 1 second in yellow. When an abnormality occurs in the tube voltage of the X-ray tube, the lamp is blinked in a blinking pattern in which the light is turned on for 1 second and turned off for 2 seconds.

  Although illustration is omitted, more light emission states can be expressed by individually controlling the light emission of the left and right columns 50. For example, three states can be expressed by emitting only the left column 50, emitting only the right column 50, and emitting both columns 50. By combining this with the emission color of each column 50 and the blinking pattern of each column 50, a large number of states can be expressed. With these various light emission states, the operation state (operation mode, etc.) and error state of the apparatus 10 can be expressed.

  Moreover, you may make it display the elapsed time from the measurement start by the position of what is light-emitted among the light emitting element 52 groups. In the example of FIG. 9, before measurement (measurement preparation state), the control device in the apparatus 10 causes all the light emitting elements of the light emitting element array 50 to emit light in green. When measurement (X-ray irradiation) is started, yellow light is emitted sequentially from the lower light emitting element 52 of the row 50 as time elapses. For example, immediately after the start of measurement, only the lowermost light emitting element 52 in the left and right columns 50 is caused to emit yellow light. Thereafter, the control device turns on the light emitting elements 52 sequentially from the bottom as time elapses. For example, the light emitting elements 52 from the lower end to the center of the row 50 are lit in yellow when the measurement period is half, and all the light emitting elements 52 from the lower end to the upper end are lit when the measurement period is almost finished. To do. Such an elapsed time display allows the operator to obtain an indication of how much the measurement period has elapsed.

  In the example of FIG. 6 and the like, the support arm portion 16 is provided with the light emitting element array 50 indicating the left and right contours of the fan beam 22. Instead, the planar light emitting portion indicating the trapezoidal range of the fan beam 22 is supported. You may provide in the arm part 16. FIG.

  In the example of FIG. 10, the light emitting element array 60 is disposed along the front-rear direction A on the side surface of the inspection unit 14, thereby displaying the scanning position of the fan beam 22. That is, in this example, the control device in the apparatus 10 scans by emitting only the light emitting elements corresponding to the position (scanning position) where the fan surface of the fan beam 22 exists among the light emitting elements on the row 60. Display position. From this display, the operator can know the scanning position during measurement.

  In the example of FIG. 11, a light emitting element array 70 in the horizontal direction and a light emitting element array 75 in the vertical direction are provided on the surface 17 of the support arm 16 in addition to the array 50 of the light emitting elements 52 indicating the range of the fan beam 22. This is an example.

  The light emitting element row 70 in the horizontal direction indicates the reference height of the upper surface of the bucky table 30. As for the reference height, when the upper surface of the Bucky table 30 matches this reference height, the width in the left-right direction of the measurement target portion (lumbar vertebra 42) of the subject 40 is almost always a fan when viewed anatomically. It is determined to match the width of the beam 22. The operator looks at the positional relationship between the light emitting element array 70 and the upper surface of the bucky table 30 from the front side of the apparatus 10 to determine whether the height of the upper surface of the bucky table 30 matches the reference height, and whether the bucky table 30 And whether or not the apparatus 10 is relatively inclined (whether the upper surface of the Bucky table 30 is horizontal). When the height does not match or there is an inclination, the operator adjusts the height or the inclination of the device 10 or the bucky stand 30 so that the upper surface of the bucky stand 30 has the light emitting element array 70. To follow.

  The light emitting element array 75 in the vertical direction has a predetermined height range upward from the reference height indicated by the light emitting element array 70 along the center line in the left-right direction B of the surface 17 of the support arm portion 16. It extends over. The light emitting element array 75 is used for determining the body thickness of the subject 40. That is, the amount of X-rays that pass through the subject 40 attenuates as the body thickness of the subject 40 increases, so when measuring the bone mineral content of the subject 40 that is significantly thicker than the standard body thickness, It is necessary to set the measurement mode for thick people such as increasing the line strength. Therefore, in the example of FIG. 11, the light emitting element array 75 represents the body thickness that is a threshold value for determining whether the measurement mode is standard or for a person having a thick body thickness. The operator views the surface 17 from the front side of the apparatus 10 and switches the measurement mode of the apparatus 10 to a person having a thick body thickness if one of the light emitting elements in the light emitting element array 75 is hidden by the subject 40 and cannot be seen. .

  Although several embodiments have been described above, the present invention is not limited to the above-described embodiments, and various modifications and improvements can be made within the scope of the invention described in the claims. Is possible.

  For example, in each example described above, the surface 17 on the front side of the support arm portion 16 is a surface perpendicular to the front-rear direction A, but this is not essential. Even when the surface 17 is not perpendicular to the front-rear direction A, the guide line 18 and the light emitting element array 50 are arranged so that the fan beam 22 is directed from the front side of the apparatus 10 toward the rear side, and the left and right contour lines of the fan beam 22 are A line in which the projection of each contour line crosses the surface 17 when projected in parallel to the line 17 may be the guide line 18 or the light emitting element array 50.

  In the above, the lumbar vertebra is exemplified as the measurement target. However, the methods of the above examples can be applied to the case of measuring other parts such as the femur and the apparatus. Furthermore, in addition to the bone mineral content measuring device, the methods of the above-described examples can be applied to a device that needs to accurately position the fan beam of radiation with respect to the target site of the subject. .

  In the above example, the X-ray generator 20 is on the lower side and the X-ray detector is on the upper side, but the arrangement relationship between them may be reversed. In addition, the above-described example method can also be applied when the arrangement relationship between the two is not left and right but right and left.

  DESCRIPTION OF SYMBOLS 10 X-ray bone salt amount measuring apparatus, 12 main-body part, 13 top plate, 14 detection part, 15 bottom plate, 16 support arm part, 18 guideline, 20 X-ray generator.

Claims (7)

A radiation generator for emitting a radiation beam;
A radiation detector disposed at a distance from the radiation generator for detecting the radiation beam;
A connecting member for connecting the radiation generator and the radiation detector on one side of the radiation beam irradiation range of the radiation generator;
With
On the other side of the irradiation range of the radiation beam of the radiation generator, a space between the radiation generator and the radiation detector is opened in order to insert and arrange a bucky table for placing a subject. A radiodiagnostic device,
The radiation diagnostic apparatus according to claim 1, wherein the connecting member has an index indicating a reference for height adjustment of the bucky table.   The radiological diagnostic apparatus according to claim 1, wherein the index represents a reference height of an upper surface of the Bucky table.   The radiation diagnostic apparatus according to claim 1, wherein the index represents a horizontal line. The index, radiation diagnostic apparatus according to any one of claims 1 to 3, characterized in that it is constituted by a light emission display.   The radiation diagnostic apparatus according to any one of claims 1 to 4, wherein a shape of the radiation beam when viewed from the one side to the other side is a fan shape. The connection member further includes a body thickness index for determining the body thickness of the subject placed on the Bucky table when the connection member is viewed from the other side to the one side. The radiation diagnostic apparatus according to claim 1, wherein: The connecting member according to the of the radiation beam emitted from the radiation generator further comprises beam shape index, a showing the shape when viewed from said other side to said one side, characterized in that Item 7. The radiation diagnostic apparatus according to any one of Items 1 to 6.

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