JP2500895B2 - Mammography system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to an X-ray tube that exposes X-rays, and a film is placed on the imaging table via the breast so as to face the exposure table. The present invention relates to a mammography apparatus that records an X-ray transmission image of a breast on a film at a predetermined density by continuing X-ray exposure until an exposure amount based on an output from a control detector reaches a predetermined level.

[0002]

2. Description of the Related Art Conventionally, this type of mammography apparatus is shown in FIG.
It is configured as shown in FIG.

That is, an X-ray tube 62 having a diaphragm device 61 for limiting the X-ray irradiation field in the X-ray radiation window and an imaging table 64 on which a film holder 63 is mounted are spaced apart from each other by a predetermined distance, and are supported by a support (not shown). Placed opposite each other on the table. This X-ray tube 6
A compression plate 65 for compressing the breast is provided between 2 and the imaging table 64 so as to be movable along a direction of approaching / separating from the imaging table.

Also, an exposure control detector 66 such as a photomultiplier or a silicon semiconductor detector is provided in the photographing table.
However, as shown in FIG. 14, it is movably supported in the direction from the chest wall of the subject to the nipple or the opposite direction along the centerline C of the imaging table, and corresponds to the individual difference in the breast size of the subject. You can do it.

The X-ray tube power supply 67 is a power supply for supplying a tube voltage to the X-ray tube 62 to irradiate X-rays, and is connected to the X-ray tube 62 via a switch 68. The opening and closing of the switch 68 is controlled by an X-ray exposure time control circuit 69. The X-ray exposure time control circuit 69 inputs the output of the detector 66 and the exposure amount given to the film 70 is predetermined. The switch 68 is set to the closed state until the level is reached, and X-ray exposure is continued for a certain period of time.
The technique of photographing while monitoring the control amount (exposure amount) is generally called X-ray automatic exposure control technique.
This is a very useful technique for obtaining an image with optimum density while suppressing the exposure dose.

By the way, the breast is divided into a mammary gland region and a fat region, and the region of interest to be used for diagnosis is the mammary gland region in which breast cancer and the like occur frequently. The milk ray region has a large X-ray absorption coefficient, but the fat region hardly absorbs X-rays.

Therefore, the detector is placed at a position facing the milk line region, avoiding the direct incidence of X-rays, and the exposure time (X-ray exposure time) is determined based on the exposure amount measured at that position. There is a need. FIG. 15 shows A in the fat region of FIG.
It is a figure which shows the time change of the exposure amount regarding the B point in the milky-line area enclosed with a dot and a dotted line. In the automatic X-ray exposure control technique, in order to obtain an appropriate exposure amount according to the internal state of the breast, the detector outputs strong X-rays with respect to the appropriate exposure level L, for example, strong X-rays transmitted through point A in the fat region. Upon reception, the X-ray exposure time control circuit 69 operates with the SA characteristic of (a), and stops the X-ray exposure at time t1 when the appropriate exposure amount (integrated value of the exposure level) shown by the diagonal line is reached. Therefore, the exposure amount at this time is
Suitable for fat areas. On the other hand, since the X-ray transmitted through the milk line region at the point B is weak, the slope of the SB characteristic is smaller than that of the SA characteristic, that is, the exposure amount per unit time is small, and therefore the exposure amount increases. As a result, there arises a problem that the image of the milk line region becomes white.

In the so-called head-to-tail direction imaging technique shown in FIG. 14, the detector can be moved along the center line C of the imaging table to face the milk line area.
For example, the lateral direction photographing technique shown in FIG.
When imaging is performed by a technique in which the mammography region such as the bilateral mammography technique for imprinting both breasts shown in 6 (b) on one film is deviated from the center line C, the detector can be opposed to the mammary region. Therefore, the exposure amount in the milk line area cannot be measured.
Therefore, the X-ray automatic exposure control technique cannot be used for such side-direction imaging and bilateral mammography, and it is necessary to manually operate the blackening degree adjuster.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to address the above-described circumstances, and its purpose is to control exposure to a region of interest at any position on the imaging table. Breast X-ray that can be faced with a detector for X-rays, which always uses X-ray automatic exposure control technology to obtain a high-quality image with optimum density while suppressing the exposure dose.
An object of the present invention is to provide a radiographic apparatus.

[0010]

According to the present invention, a film is made to face an X-ray tube that exposes X-rays through a breast on an imaging table, and the X-ray tube is made to face the inside of the imaging table. Based on the output from the contained detector for exposure control, X-ray exposure is continued until the exposure amount reaches a predetermined level, so that the X-ray transmission image of the region of interest of the breast is printed on the film at a predetermined density. In the mammography apparatus, the imaging table supports the detector movably along a predetermined direction and a direction intersecting the predetermined direction.
It is a radiographic device.

[0011]

According to the present invention, the exposure control detector is moved along a predetermined direction and a direction intersecting with the predetermined direction regardless of the position of the region of interest of the breast on the imaging table. You can face the area of interest.

[0012]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a mammography apparatus according to the first embodiment. As shown in FIG. 1, the C-arm 1 is rotatably supported by a column 2 around a horizontal rotation axis R, and holds an X-ray tube 3 and a film 4 for irradiating X-rays at each end. The film holder 5 that supports the film holder 5 is detachably supported. A compression plate 7 for compressing the breast is supported by an arm 8 so as to be movable in a direction toward / away from the imaging table 6. A diaphragm device 9 for limiting the X-ray irradiation field is fixed to the radiation window of the X-ray tube 3.

An exposure control detector 10 such as a photomultiplier or a silicon semiconductor detector, and a position detector 1 for detecting the position of the detector 10 are provided inside the photographing table 6.
1st class is housed.

FIG. 2 is a block diagram of the X-ray imaging system.
The X-ray tube supply power source 12 is a power source for supplying a tube voltage to the X-ray tube 3 to irradiate X-rays, and is connected to the X-ray tube 3 via a switch 13. The opening and closing of the switch 13 is controlled by an X-ray exposure time control circuit 14, and the X-ray exposure time control circuit 14 inputs the output of the detector 10 and the exposure amount given to the film 4 is predetermined. The switch 13 is set to a closed state until the level is reached, and X-ray irradiation is continued for a certain period of time.

FIG. 3 is a view showing the internal structure of the photographing table 6 with the upper case of the photographing table 6 removed. As shown in FIG. 3, two rods 15 and 16 are arranged orthogonally in the imaging table 6, and one rod 15 is along the chest wall of the subject facing the imaging table 6 to be imaged. The rod 16 is provided so as to be movable in parallel in the direction (X direction), and the other rod 16 is provided so as to be movable in parallel in the direction from the chest wall of the subject to the nipple, that is, in the direction orthogonal to the X direction (Y direction). The rods 15 and 16 are respectively provided with levers 17 and 18 for manual operation so as to project from the photographing table 6. The detector 10 is attached to the intersection of the two rods 15 and 16, and X.
It is moved in the Y direction.

The above-mentioned position detecting device 11 has a plurality of, here six, microswitches 19 to 24, of which three microswitches 19 to 21 are arranged along the X direction and of the rod 15. It is adapted to be selectively turned on according to the position. The other three micro switches 22 to 24 are arranged along the Y direction, and the rod 16
Is selectively turned on according to the position of.

FIG. 4 is a block diagram of the detector position display system. The input end of the display controller 25 is the position detection device 11
Of the micro switches 19 to 21 and the ON signal of any of the micro switches 22 to 24 are input, and the display 26 is displayed in accordance with the combination thereof. Display one of the alternatives. Display segments 27-3
5 are arranged corresponding to each position of the detector 10 shown by the dotted line in FIG. The compression plate 7 described above is a transparent plate, and nine markers 36 to 44 are printed on the surface thereof in correspondence with the respective positions of the detector 10 shown by the dotted lines in FIG. Next, the operation of this embodiment having the above configuration will be described. FIG. 6 is a diagram showing three types of photographing techniques and display states. The diagonal lines indicate the milk line area.

FIG. 6A shows a state in which the breast on the imaging table is viewed from the X-ray tube side through the transparent compression plate in the case of the most frequent head-to-caudal imaging technique. (B) has shown the display segment of the indicator 26 lighted at this time.

As described in the description of the prior art, in order to perform imaging under the X-ray automatic exposure control technique, the detector 10 is placed at a position facing the mammary ray region while avoiding the direct incidence of X-rays. I want to place it.

Therefore, it is desired to arrange the detector 10 at a position facing the milk line region, that is, at a position corresponding to the position of the marker 40 on the compression plate 7. The position of the milk line region can be estimated from the size of the breast of the subject. First,
The lever 17 is operated to move the rod 15 until the micro switch 20 is turned on, and the lever 18 is operated to move the rod 16 until the micro switch 23 is turned on.

At this time, as shown in FIG. 6B, the display segment 31 of the display unit 26 is turned on, indicating that the detector 10 is arranged at a predetermined position, that is, a position corresponding to the marker 40. Be done.

After placing the detector 10 in this position, X
Shooting is performed using the automatic line exposure control technology. That is, in order to start imaging, the switch 13 is set to the closed state, the tube voltage is supplied from the X-ray tube power supply 12 to the X-ray tube 3 to start X-ray bombardment, and the detector 10 causes the milk line. The intensity measurement of the X-ray transmitted through the area is started.

The X-ray exposure time control circuit 14 includes a detector 10
From the X-ray tube supply power source 12 to the X-ray tube 3 when the exposure amount calculated based on this detection signal reaches a predetermined level. Stop the supply of tube voltage. As a result, it is possible to obtain an image having the optimum density in the milk line region.
Next, the case of the lateral direction photographing technique will be described.

FIG. 6C shows X in the case of the lateral direction photographing technique.
FIG. 6D shows a display segment of the indicator 26 that is turned on at this time, showing a state in which the breast on the imaging table is viewed from the side of the wire tube through the transparent compression plate.

It is desired to arrange the detector 10 at a position facing the milk line region, that is, at a position corresponding to the position of the marker 41 of the compression plate 7. Therefore, the lever 17 is operated to move the rod 15 until the micro switch 21 is turned on,
In addition, the lever 18 is operated to move the rod 16 until the micro switch 23 is turned on. Thus, the detector 1
Since 0 is movably supported in the XY directions, even when the milk line area deviates from the center line C, it can be arranged at a position facing the milk line area, whereby X-ray automatic exposure control technology is provided. Can be used. After arranging the detector 10 at this position, photographing is performed using the X-ray automatic exposure control technique as described above. Next, the case of the both mammography technique will be described.

FIG. 6 (e) shows a state in which the breast on the imaging table is viewed from the X-ray tube side through the transparent compression plate in the case of the both mammography technique, and FIG. 6 (f) is lit at this time. Display 2
6 shows 6 display segments.

The detector 10 is desired to be arranged at a position facing the milk line region, that is, at a position corresponding to the position of the marker 39 or 41 of the compression plate 7 (which will be described as the position of the marker 39 here). Therefore, the lever 17 is operated to move the rod 15 until the micro switch 19 is turned on, and the lever 18 is operated to move the rod 16 until the micro switch 23 is turned on. Since the detector 10 is supported so as to be movable in the XY directions in this way, even when the milk line area deviates from the center line C, it can be arranged at a position facing the milk line area, whereby X Automatic line exposure control technology can be used. After arranging the detector 10 at this position, photographing is performed using the X-ray automatic exposure control technique as described above.

As described above, in this embodiment, since the detector for exposure control is provided so as to be movable in the direction along the chest wall of the subject and in the nipple direction from the chest wall of the subject to the nipple, the lateral direction Even if the mammography region is off the center line of the imaging table, such as in the imaging technique or the bi-mammography technique, the detector can be placed in a position facing the mammography region, thereby enabling automatic X-ray exposure control technology. It is possible to obtain a high-quality image with optimum density while controlling the exposure dose. Next, a second embodiment will be described. The overall structure is not different from that of FIG. 1 described in the previous embodiment. FIG. 7 shows the embodiment of FIG.
Are shown in correspondence with. Therefore, the portions corresponding to those in FIG. 1 are designated by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

An angle detector 45 is provided for detecting the tilt angle of the X-ray tube 3 and the imaging stand 6 with respect to the vertical position (hereinafter referred to as "0 ° position") as the C-arm 1 rotates.

The angle detector 45 is composed of, for example, three micro switches 46 to 48 as shown in the section AA of FIG. 7 in FIG. These micro switches 46-
Reference numeral 48 is a protrusion 49 in which a part of the rotation axis of the C arm 1 is protruded.
Are arranged along the circular orbit of (1) and are selectively turned on according to the rotation angle of the C-arm 1.

Returning to FIG. 7, the diaphragm device 50 attached to the radiation window of the X-ray tube 3 is constructed so that its plane is shown in FIG. The shaded area is the X
The opening range which forms a radiation field is shown. This diaphragm device 50
In the mask 51, one of which is cut to approximate a breast curve
Is the direction of the arrow, that is, Y from the chest wall of the subject toward the nipple
It is slidable in any direction and the opening range is variable. The mask 51 is a mask for the cranio-caudal imaging technique. In addition to this, various masks such as a mask for both mammography techniques having different cutting shapes and a mask for the lateral direction imaging technique are prepared. , Can be replaced as appropriate. A mask position detector 52 for detecting the slide position of the mask 51 is attached to the diaphragm device 50 along the slide track of the mask 51.

As in the first embodiment, a detector 10 supported by rods 15 and 16 movably in the X and Y directions and a position for detecting the position of the detector 10 are provided inside the photographing table 6. The detection device 11 and the like are housed.

Returning to FIG. 7, in the present embodiment, the photographing table 6 further includes a motor 55 for moving and driving the rod 15 along the X direction, and a motor 56 for moving and driving the rod 16 along the Y direction. A drive device 53 having a is attached.
FIG. 10 is a block diagram of a drive control system that adjusts the position of the detector.

The motor drive controller 54 includes an angle detector 45.
And the respective detection signals from the mask position detector 52 and the position detection device 11 are input, and the motor (Mx) is correspondingly input.
Driving power is supplied to 55 and the motor (MY) 56, and the detector 10 is set at an optimum position, that is, a position facing the milk line region. Reference numeral 57 is an operation switch for manually operating the position of the detector 10. Next, the operation of this embodiment having the above configuration will be described.

FIG. 11 is a diagram showing the tilted positions of the X-ray tube 3 and the imaging table 6 corresponding to various imaging techniques. FIG. 11A shows the X-direction in the most frequently used head-to-caudal imaging technique. The “0 ° position” of the ray tube 3 and the imaging table 6 is shown, (b) shows the “+ 90 ° position” in the case of the lateral direction imaging technique for imaging the right breast, and (c) is the lateral surface for imaging the left breast. The “-90 ° position” in the case of the direction imaging technique is shown. The dotted line indicates the subject. FIG. 12 is a diagram showing a state in which the breast on the imaging table is viewed from the X-ray tube side through a transparent compression plate. (A) is the case of cranio-caudal imaging technique, (b) is the right breast. It shows a case of a lateral direction photographing technique for photographing. The diagonal lines indicate the milk line area. .

In the case of the head-to-tail direction photographing technique, FIG.
As shown in (a), the C-arm 1 is rotated to move the X-ray tube 3
And the imaging stand 6 is set to the “0 ° position”. The breast is placed on the imaging table 6 via a film, and the milk line area is located on the center line C of the imaging table 6 as shown in FIG.

At this time, the micro switch 47 of the angle detector 45 is turned on by the protrusion 49 of the C-arm 1 rotary shaft, and this ON signal is supplied to the motor drive controller 54. Upon receiving the ON signal, the motor drive control unit 54 supplies drive power to the motor 55 to rotate the motor 55.

When the rod 15 slides along the X direction in accordance with the rotation of the motor 55 and the micro switch 20 of the position detector 11 is turned on, the motor drive control section 54 sends the signal to the motor 55 based on this on signal. To stop the rod 15 along the center line C.

On the other hand, the mask 51 is slid according to the size of the breast of the subject using an irradiation field confirmation device such as a light projector (not shown), and the minimum opening range for irradiating the breast is set. The position of the mask 51 at this time is
The detection signal is detected by the mask position detector 52, and this detection signal is supplied to the motor drive control unit 54.

The motor drive control unit 54 recognizes the position of the milk line region in the Y direction on the basis of this detection signal, because the distance of the milk line region in the breast from the chest wall is almost uniquely determined according to the breast size. Then, according to this position, until the rod 16 turns on any of the microswitches 22 to 24 of the position detector 11, here, the driving power is continuously supplied to the motor 56 until the microswitch 23 turns on. To slide. Therefore, the detector 10 is arranged at a position corresponding to the mark 40 on the compression plate 7, and as a result, can face the mammary line region which is the region of interest.
After arranging the detector 10 at this position, imaging is performed using the X-ray automatic exposure control technique as described in the first embodiment. Next, a case of a lateral direction photographing technique for photographing the right breast will be described.

In the case of the lateral direction radiographing technique for radiographing the right breast, the C-arm 1 is rotated and the X-ray tube 3 and the radiographing table 6 are set to the "+ 90 ° position" as shown in FIG. 11 (b). Is set. Then, as shown in FIG. 12 (b), the breast is sandwiched and fixed by the imaging table 6 and the compression plate 7 via the film.

At this time, the micro switch 48 of the angle detector 45 is turned on by the protrusion 49 of the rotating shaft of the C-arm 1, and this ON signal is supplied to the motor drive controller 54. Upon receiving the ON signal, the motor drive control unit 54 supplies drive power to the motor 55 to rotate the motor 55.

When the rod 15 slides along the X direction in accordance with the rotation of the motor 55 and the micro switch 21 of the position detector 11 is turned on, the motor drive control section 54 sends the motor 55 to the motor 55 based on the on signal. Then, the supply of the driving power of the above is stopped and the rod 15 is stopped.

On the other hand, a mask for lateral direction imaging is slid according to the size of the breast of the subject using an irradiation field confirmation device such as a light projector (not shown), and the minimum opening range for irradiating this breast is obtained. Is set. The mask position at this time is detected by the mask position detector 52, and this detection signal is supplied to the motor drive control unit 54.

The motor drive control unit 54 recognizes the position of the milk line region in the Y direction based on this detection signal, because the distance of the milk line region in the breast from the chest wall is almost uniquely determined according to the breast size. Then, according to this position, until the rod 16 turns on any of the microswitches 22 to 24 of the position detector 11, here, the driving power is continuously supplied to the motor 56 until the microswitch 23 turns on. To slide. Therefore, the detector 10 is shown in FIG.
It is arranged at a position corresponding to the mark 41 of the compression plate 7 shown in FIG. After arranging the detector 10 at this position, imaging is performed using the X-ray automatic exposure control technique as described in the first embodiment. Next, a case of a lateral direction photographing technique for photographing the left breast will be described.

In the case of the lateral direction radiographing technique for radiographing the left breast, the C-arm 1 is rotated, and the X-ray tube 3 and the radiographing table 6 are in the "-90 ° position" as shown in FIG. 11 (c). Is set to.

At this time, the micro switch 46 of the angle detector 45 is turned on by the protrusion 49 of the rotating shaft of the C-arm 1, and this ON signal is supplied to the motor drive controller 54. Upon receiving the ON signal, the motor drive control unit 54 supplies drive power to the motor 55 to rotate the motor 55.

When the rod 15 slides along the X direction in accordance with the rotation of the motor 55 and the micro switch 19 of the position detector 11 is turned on, the motor drive control section 54 sends the signal to the motor 55 based on this on signal. Then, the supply of the driving power of the above is stopped and the rod 15 is stopped.

On the other hand, a mask for photographing the lateral direction is slid according to the size of the breast of the subject by using an irradiation field confirmation device such as a floodlight (not shown), and the minimum opening range for irradiating this breast is set. Is set. The mask position at this time is detected by the mask position detector 52, and this detection signal is supplied to the motor drive control unit 54.

The motor drive control unit 54 recognizes the position of the milk line region in the Y direction based on this detection signal because the distance of the milk line region in the breast from the chest wall is almost uniquely determined according to the breast size. However, according to this position, the rod 16 continues to supply the drive power to the motor 56 until any of the micro switches 22 to 24 of the position detector 11 is turned on, for example, the micro switch 22 is turned on.
Slide 6 Therefore, the detector 10 can face the milk line region, which is the region of interest. Detector 10
After arranging at this position, photographing is performed using the X-ray automatic exposure control technique as described in the first embodiment.

As described above, according to this embodiment as well, the same effects as those of the first embodiment can be obtained, and the unique effects which are not provided in the first embodiment can be obtained. That is,
In the present embodiment, the position of the detector in the X direction (the direction along the chest wall) is recognized based on the rotation angle of the C-arm installed according to the imaging technique used, and is set according to the breast size of the subject. The position of the mask to be detected, that is, the position of the detector in the Y direction (direction from the chest wall to the nipple) is recognized based on the opening size, and the drive device is controlled according to the XY position to face the detector to the milk line region. Since the motor drive controller is provided, it is not necessary to manually move the detector as in the first embodiment. The present invention is not limited to the above-described embodiments, but can be implemented with various modifications.

[0053]

As described above, according to the present invention, the film is made to face the X-ray tube which exposes the X-rays through the breast on the imaging table, and the X-ray tube is opposed to the inside of the imaging table. The X-ray transmission image of the region of interest of the breast is copied onto the film at a predetermined density by continuing X-ray exposure until the exposure amount reaches a predetermined level based on the output from the exposure control detector stored in the film. In the embedded mammography apparatus, the imaging table is a mammography apparatus characterized by movably supporting the detector along a predetermined direction and a direction intersecting the predetermined direction. No matter where the region of interest of the breast is located on the imaging table, the detector for exposure control can be moved along the predetermined direction and the direction intersecting the predetermined direction to face the region of interest. Therefore, what kind of shooting technique Also using an X-ray automatic exposure control techniques when you use, it is possible to obtain a high quality image of the optimum concentration while suppressing the amount of exposure.

[Brief description of drawings]

FIG. 1 is a side view of a mammography apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram of an X-ray imaging system.

FIG. 3 is a plan view showing an internal structure of the photographing table shown in FIG. 1 with an upper case removed.

FIG. 4 is a block diagram of a detector position display system.

FIG. 5 is a plan view of a compression plate.

FIG. 6 is a diagram for explaining the operation of the first embodiment.

FIG. 7 is a side view of the mammography apparatus according to the second embodiment of the present invention.

8 is a cross-sectional view taken along the line AA of FIG.

9 is a plan view showing the structure of the diaphragm device of FIG. 7. FIG.

FIG. 10 is a block diagram of a drive control system that adjusts the position of a detector.

FIG. 11 is a diagram showing an X-ray tube and an inclined position of an imaging table corresponding to various imaging techniques.

FIG. 12 is a view of a breast on an imaging table viewed from the X-ray tube side through a transparent compression plate.

FIG. 13 is a diagram illustrating a conventional mammography apparatus.

FIG. 14 is a view of the breast on the imaging table through the transparent compression plate from the X-ray tube side in the cranio-caudal imaging method using the conventional mammography apparatus.

15 is a diagram showing a temporal change of the exposure amount with respect to point A in the fat area and point B in the milk line area surrounded by a dotted line in FIG. 14;

FIG. 16 is a view of the breast on the imaging table through a transparent compression plate from the X-ray tube side in the case of the lateral direction radiography technique or the bilateral mammography technique by the conventional mammography apparatus.

[Explanation of symbols]

1 ... C arm, 2 ... posts, 3 ... X-ray tube, 4 ... film,
5 ... Film holder, 6 ... Shooting table, 7 ... Compression plate, 8 ...
Compression plate holding arm, 9 ... Throttling device, 10 ... Detector, 11
... Position detector, 12 ... X-ray tube power supply, 13 ... Switch, 14 ... X-ray exposure time control circuit, 15 ... X-direction rod, 16 ... Y-direction rod, 17, 18 ... Lever, 19-
24 ... Micro switch, 25 ... Display controller, 26 ... Indicator, 27-35 ... Display segment, 36-44 ... Compression plate marker.

Claims (3)

(57) [Claims] 1. An imaging table on which a breast is placed, a plurality of markers are discretely marked on a plate surface, a transparent compression plate for pressing the breast on the imaging table, and the breast is irradiated. An X-ray tube for irradiating the X-ray, an imaging means for imaging an X-ray image transmitted through the breast, an X-ray detection means for detecting an X-ray transmitted through a part of the breast, the X-ray An exposure control unit that controls irradiation of X-rays to the breast based on the output of the X-ray detection unit so that an image is captured at a predetermined density by the imaging unit, and a plane parallel to the imaging table. It can move in two dimensions
A support unit that supports the X-ray detection unit, a position detection unit that detects the position of the X-ray detection unit, and a line that connects the X-ray tube and the X-ray detection unit based on the detection result of the position detection unit. And a unit for displaying information for identifying a marker existing in the mammography apparatus. 2. The X-ray detecting means is manually moved.
Further, a lever provided in the X-ray detection means for
The mammography apparatus according to claim 1, further comprising:
Place. 3. A diaphragm for adjusting an X-ray irradiation field to the breast.
And the X-ray detection based on the size of the irradiation field.
Means for moving the means and changing the position of the X-ray detection means,
The breast X according to claim 1, further comprising:
X-ray equipment.