JP7123582B2 - X-ray diagnostic equipment - Google Patents

Description

An embodiment of the invention relates to an X-ray diagnostic apparatus.

Conventionally, in an examination using an X-ray diagnostic apparatus, a narrow region of interest may be observed with high resolution. For this reason, the first detector with a large field of view adopting a TFT (Thin Film Transistor) array and the first detector using CMOS (Complementary Metal Oxide Semiconductor) have a smaller field of view and a pixel pitch An X-ray diagnostic apparatus is known that has a detector that also has a fine second detector.

In such an X-ray diagnostic apparatus, the first detector and the second detector are switched according to the application, and the first image generated from the X-ray signal output by the first detector is obtained. and a second image generated from the X-ray signal output by the second detector.

U.S. Patent Application Publication No. 2015/0003584

A problem to be solved by the present invention is to provide an X-ray diagnostic apparatus capable of supplementing a partial area of an image to be displayed.

An X-ray diagnostic apparatus according to an embodiment includes an X-ray detector and a controller. The X-ray detector has a first detection section and a second detection section capable of simultaneously detecting X-rays emitted from the X-ray tube. When displaying on the display unit one of a first image based on the output of the first detection unit and a second image based on the output of the second detection unit, the control unit controls whether the one image is displayed on the display unit. display the other image corresponding to a partial area of the image of

FIG. 1 is a block diagram showing a configuration example of an X-ray diagnostic apparatus according to the first embodiment. FIG. 2 is a block diagram showing a configuration example of the X-ray detector according to the first embodiment. FIG. 3 is a diagram for explaining the first embodiment. FIG. 4 is a block diagram showing a configuration example of the X-ray image acquisition device according to the first embodiment. FIG. 5A is a diagram for explaining the first embodiment. FIG. 5B is a diagram for explaining the first embodiment. FIG. 6 is a flow chart showing a processing procedure by the X-ray image acquisition device according to the first embodiment. FIG. 7 is a diagram for explaining the second embodiment. FIG. 8 is a block diagram showing a configuration example of an X-ray image acquisition apparatus according to the second embodiment. FIG. 9A is a diagram for explaining the second embodiment. FIG. 9B is a diagram for explaining the second embodiment. FIG. 10 is a flow chart showing a processing procedure by the X-ray image acquisition device according to the second embodiment. FIG. 11A is a diagram for explaining a modification of the second embodiment; FIG. 11B is a diagram for explaining a modification of the second embodiment; FIG. 12 is a flow chart showing a processing procedure by the X-ray image acquisition device according to the modification of the second embodiment.

An X-ray diagnostic apparatus according to an embodiment will be described below with reference to the drawings. In addition, embodiment is not restricted to the following embodiments. In addition, the contents described in one embodiment are in principle similarly applied to other embodiments.

(First embodiment)
FIG. 1 is a block diagram showing a configuration example of an X-ray diagnostic apparatus 100 according to the first embodiment. As shown in FIG. 1, an X-ray diagnostic apparatus 100 according to the first embodiment includes a catheter bed 101, a holding device 102, an X-ray high voltage generator 107, a holding device control device 108, and a monitor 109. , an X-ray image acquisition device 110 , an X-ray detector (Flat Panel Detector) controller 120 and an input interface 130 .

The catheter bed 101 is vertically and horizontally movable, and a subject P is placed thereon. The holding device 102 is rotatable about the Z axis in the direction of arrow R, and holds the X-ray source 103 and the X-ray detector 106 facing each other.

The X-ray source 103 includes an X-ray tube 103a that emits X-rays, an aperture (also referred to as a collimator) and a radiation quality adjustment filter 103b that are used for the purpose of reducing the exposure dose to the subject P and improving the image quality of image data. have

An X-ray detector (FPD: also called Flat Panel Detector) 106 detects X-rays emitted from the X-ray source 103 and transmitted through the subject P. FIG. The X-ray detector 106 has a first detection section and a second detection section capable of simultaneously detecting X-rays emitted from the X-ray source 103 . The X-ray detector 106 according to the first embodiment will be described below with reference to FIG. FIG. 2 is a block diagram showing a configuration example of the X-ray detector 106 according to the first embodiment.

For example, the X-ray detector 106 has a first photodetector 106a, a second photodetector 106b, and a scintillator 106c, as shown in FIG. The first photodetector 106a and the scintillator 106c constitute the first detector 106d (also referred to as the first FPD), and the second photodetector 106b and the scintillator 106c constitute the second detector 106e (the first FPD). 2 FPD) is configured. Note that the first FPD is an example of the first detection unit. Also, the second FPD is an example of a second detection unit. Also, in FIG. 2, the scintillator 106c is arranged so as to be sandwiched between the first photodetector 106a and the second photodetector 106b.

The scintillator 106c converts X-rays emitted from the X-ray source 103 into light. The first photodetector 106a includes, for example, a two-dimensional image sensor employing a TFT (Thin Film Transistor) array made of amorphous silicon, detects light converted by the scintillator 106c, and outputs an electrical signal. do. The second photodetector 106b includes, for example, a two-dimensional image sensor employing a CMOS (Complementary Metal Oxide Semiconductor) transistor, detects light converted by the scintillator 106c, and outputs an electrical signal. The electrical signals output by the first photodetector 106a and the second photodetector 106b are also called X-ray signals.

Thus, the scintillator 106c is shared by the first photodetector 106a and the second photodetector 106b. In other words, the X-ray detector 106 shares the scintillator 106c with the scintillator 106c that converts X-rays emitted from the X-ray source 103 into light, detects the light converted by the scintillator 106c, and outputs an electrical signal. and a first photodetector 106a and a second photodetector 106b. Then, the first photodetector 106a and the second photodetector 106b output electric signals simultaneously detecting the light converted by the scintillator 106c.

In addition, as shown in FIG. 2, the first photodetector 106a and the second photodetector 106b each have a plurality of element units that constitute pixels. Each of these element units converts a fluorescent image obtained by incident X-rays into an electrical signal and stores the electrical signal in a photodiode (PD). The example of FIG. 2 illustrates the case where the first photodetector 106a has eight element portions and the second photodetector 106b has eight element portions.

Here, the pixel pitch of each element portion of the second photodetector 106b is finer than the pixel pitch of each element portion of the first photodetector 106a. In the example shown in FIG. 2, the pixel pitch of each element portion of the first photodetector 106a corresponds to the pixel pitch of two element portions of the second photodetector 106b. That is, the second photodetector 106b has a higher resolution than the first photodetector 106a. Also, as shown in FIG. 2, the first photodetector 106a has a wider field of view than the second photodetector 106b.

Furthermore, the second photodetector 106b employing CMOS tends to have a smaller maximum incident X-ray dose than the first photodetector 106a employing amorphous silicon. Therefore, in the second photodetector 106b, when a high dose of X-rays is irradiated to collect X-ray image data with a high S/N (Signal to Noise) ratio, Acquiring X-ray image data may not be possible.

Also, the second photodetector 106b has less residual component of the electrical signal than the first photodetector 106a. In the photodiode of the first photodetector 106a, generated charges are trapped in an internal trap level. On the other hand, the second photodetector 106b traps less charge generated in the photodiode due to the CMOS characteristics.

Return to FIG. The X-ray detector control device 120 controls the readout timing of the electric signal by the X-ray detector 106 . The X-ray detector control device 120 also collects electrical signals from the X-ray detector 106 , generates image data from the collected electrical signals, and outputs the image data to the X-ray image acquisition device 110 . Here, the X-ray detector control device 120 collects electrical signals output by the first FPD, and generates first image data (also referred to as a first FPD image or a first image) from the collected electrical signals. is generated and output to the X-ray image acquisition device 110 . In addition, the X-ray detector control device 120 collects electrical signals output by the second FPD, and generates second image data (also referred to as a second FPD image or a second image) from the collected electrical signals. It is generated and output to the X-ray image acquisition device 110 .

The X-ray image acquisition device 110 controls the holding device control device 108 and the X-ray high voltage generator 107, collects the image data output by the X-ray detector control device 120, and performs image processing. Here, the X-ray image acquisition device 110 acquires image data from the first FPD and the second FPD at approximately the same timing. Details of the X-ray image acquisition device 110 will be described later.

The X-ray high voltage generator 107 supplies a high voltage to the X-ray tube 103a. The holding device controller 108 controls the rotation of the holding device 102 under the control of the X-ray image acquisition device 110 . A monitor 109 displays an X-ray image and the like generated by the X-ray image acquisition device 110 . The monitor 109 may be composed of a plurality of sub-monitors, or may be a large-screen monitor whose display area can be arbitrarily divided according to the operator's instruction. Moreover, when the monitor 109 has a plurality of sub-monitors, the display area of each sub-monitor may be arbitrarily divided according to the operator's instruction. The input interface 130 is a keyboard, a control panel, a footswitch, etc., and receives input of various operations to the X-ray diagnostic apparatus 100 from the operator.

The overall configuration of the X-ray diagnostic apparatus 100 according to the first embodiment has been described above. With such a configuration, the X-ray diagnostic apparatus 100 according to the first embodiment collects X-ray signals output by the X-ray detector 106 . Then, the X-ray diagnostic apparatus 100 causes the monitor 109 to display an image generated from the collected X-ray signals. For example, the X-ray diagnostic apparatus 100 causes the monitor 109 to display an image set by the operator according to the clinical site. For example, the X-ray diagnostic apparatus 100 causes the monitor 109 to switch between the first image and the second image in accordance with an operator's instruction.

With such an X-ray diagnostic apparatus, in actual clinical procedures, it may be necessary to observe the target region for another purpose after confirming the X-ray image acquired for the original purpose. In such a case, the first image or the second image would normally be acquired under the desired conditions again for this other purpose. However, from the viewpoint of reducing the exposure dose of X-rays to the subject, it is desirable to avoid acquiring images again for other purposes. Further, when acquiring the first image, the electrical signal is also acquired from the second FPD, and when acquiring the second image, the electrical signal is also acquired from the first FPD. there is For this reason, in the following embodiments, the first image generated from the electrical signal output by the first photodetector 106a and the image generated from the electrical signal output by the second photodetector 106b When one of the second images is displayed on the monitor 109, the other image corresponding to a partial area of the one image is displayed. That is, when the X-ray diagnostic apparatus 100 displays one of the first image and the second image on the monitor 109, it displays the other image that compensates for a partial area of the one image. . Note that in the X-ray diagnostic apparatus 100 according to the first embodiment, for example, when displaying the first image generated from the electrical signal output by the first photodetector 106a on the monitor 109, the first A case of displaying a second image that compensates for a partial area of the image of . FIG. 3 is a diagram for explaining the first embodiment.

State 1 in FIG. 3 shows an example of the first image acquired upon receipt of display of the first image. For example, the operator observes the first image shown in state 1 of FIG. 3 after acquiring the images. Here, when observing the first image, the operator may wish to observe a new site of interest as shown in state 2 in FIG. 3, for example. A region 3a surrounded by a dashed line in State 2 of FIG. 3 indicates a region of interest set by the operator. Note that setting the region of interest is an example of a predetermined trigger. A region 3b enclosed by a dashed line in State 3 of FIG. 3 indicates the visual field region of the second FPD when the first image was acquired. State 4 in FIG. 3 shows an example of the second image generated from the electrical signals collected by the second FPD when the display of the first image is accepted. When the region of interest is set in the first image in state 2 or state 3, the second image shown in state 4 of FIG. 3 is further displayed. This second image is a high-resolution image that includes the region of interest set in the first image. That is, the second image is an image that complements the first image. Therefore, the operator can observe the region of interest in the first image in more detail without photographing the subject again. In addition, by making it possible to omit re-imaging in this way, it is possible to reduce exposure to the subject. Complementary processing for displaying the other image that compensates for a partial area of such an image is performed by the X-ray image acquisition device 110 . Details of the complementing process by the X-ray image acquisition device 110 will be described below with reference to FIG. 4 . Note that the X-ray image acquisition device 110 is an example of a control unit.

FIG. 4 is a block diagram showing a configuration example of the X-ray image acquisition device 110 according to the first embodiment. Note that FIG. 4 also shows the X-ray source 103, the X-ray detector 106, the X-ray detector control device 120, the monitor 109, and the input interface 130 for convenience of explanation. In the example shown in FIG. 2, the X-ray detector 106 has a first photodetector 106a, a second photodetector 106b, and a scintillator 106c. , it has a video signal amplifier circuit and an A/D (Analog to Digital) conversion circuit. In addition, in the second photodetector 106b, an electric signal with reduced noise can be output by arranging a first-stage amplifier circuit in each element portion and outputting an amplified signal. An A/D conversion circuit may also be configured, and in such a case, the second photodetector 106b converts the accumulated electrical signal into a digital signal and outputs the digital signal. In this case, further noise reduction is possible. As shown in FIG. 4, in the X-ray detector 106, the first FPD is provided closer to the X-ray source 103 than the second FPD.

The X-ray detector 106 also has a drive control circuit 106f and a video signal processing circuit 106g. The drive control circuit 106f controls drive timings of the first photodetector 106a and the second photodetector 106b under the control of the X-ray detector control device 120. FIG. The video signal processing circuit 106g collects electrical signals output from the first photodetector 106a, outputs them to the X-ray detector control device 120, and outputs electrical signals output from the second photodetector 106b. Collect and output to the X-ray detector controller 120 .

Further, in the example shown in FIG. 4, the transmission of images from the X-ray detector control device 120 to the X-ray image acquisition device 110 is performed by providing data lines for the first image and the second image, respectively. Although described as being parallel, embodiments are not limited to this. For example, transmission of images from the X-ray detector controller 120 to the X-ray image acquisition device 110 may be serial, with data lines shared between the first image and the second image.

The X-ray image acquisition apparatus 110 according to the first embodiment, as shown in FIG. 206.

The FPD control circuit 201 controls the readout timing of electric signals by the X-ray detector 106 via the X-ray detector control device 120 . The image processing circuit 202 performs image processing on the image data output from the X-ray detector control device 120 . Disk 203 stores the X-ray images. For example, the disk 203 is an HDD (Hard Disk Drive) and stores the second image. Disk 204 stores the X-ray images. For example, disk 204 is an HDD and stores the first image.

For example, the image processing circuit 202 causes the disk 203 and the disk 204 to store the image data output by the X-ray detector control device 120 . At this time, the image processing circuit 202 associates the first image based on the output of the first detector with the second image based on the output of the second detector, and stores them in the discs 203 and 204. You can do it. As an example, the image processing circuit 202 first obtains from the X-ray detector control device 120 a combination of a first image and a second image based on simultaneously detected X-rays. Next, the image processing circuit 202 appends information for referring to the first image to the second image and stores the second image in the disk 203 . In addition, the image processing circuit 202 stores the first image in the disc 204 with information for referring to the second image attached to the first image.

In the example shown in FIG. 4, the case where the X-ray image acquisition apparatus 110 includes the second image disk 203 and the first image disk 204 will be described. and the second image may share one disk. Note that the disk 203 and the disk 204 are examples of a storage unit. The combining circuit 206 generates a combined image by superimposing one of the first image and the second image on the other image.

The input interface 130 receives instructions from the operator and transfers the received instructions to the UI control circuit 205 . The UI control circuit 205 causes the image processing circuit 202 to display an image for which an instruction is received from the operator via the input interface 130 . For example, when receiving the display of the first image, the UI control circuit 205 turns the switch A to the a side. Accordingly, the image processing circuit 202 causes the monitor 109 to display the first image. Further, for example, when the UI control circuit 205 accepts display of the second image, the UI control circuit 205 turns the switch A to the b side. Accordingly, the image processing circuit 202 causes the monitor 109 to display the second image.

Also, the UI control circuit 205 receives an instruction to execute the complementing process from the operator via the input interface 130 and causes the image processing circuit 202 to execute the complementing process. For example, the UI control circuit 205 causes the image processing circuit 202 to perform the complementing process when receiving the setting of the region of interest from the operator via the input interface 130 while the first image is being displayed.

When the image processing circuit 202 receives an instruction to execute the complementary processing, when displaying the first image generated from the electrical signal output by the first photodetector 106a on the monitor 109, the image processing circuit 202 Display a second image that compensates for the partial area. More specifically, when the image processing circuit 202 displays the first image on the monitor 109, if the region of interest set in the first image exists within the field of view of the second detector 106e, A second image containing the region of interest is also displayed. That is, when the operator reviews the previously acquired first image, the image processing circuit 202 determines if the region of interest set in the first image exists within the field of view of the second detector 106e. , recalls a second image containing the region of interest acquired at the same time as the previously acquired first image, and causes the monitor 109 to display the first image and the called second image.

Here, when executing the complementing process, the image processing circuit 202 may independently display the first image and the second image including the region of interest, or display the region of interest on the first image. A second image containing the image may be superimposed and displayed. 5A and 5B are diagrams for explaining the first embodiment.

FIG. 5A shows a case where the first image and the second image including the region of interest are displayed independently. In the example shown in FIG. 5A, the monitor 109 has multiple sub-monitors 109a and 109b. As shown in FIG. 5A, the sub-monitor 109a displays the first image collected upon receiving the display of the first image. In such a case, the UI control circuit 205 turns the switch A shown in FIG. 4 to the a side. Then, when the region of interest 5a is set in the first image (read out from the disk 204), the image processing circuit 202 determines whether the region of interest is included in the second image. Then, when the image processing circuit 202 determines that the region of interest is included in the second image, the UI control circuit 205 flips switch A shown in FIG. It reads from the disk 203 and outputs it to the monitor 109 . Thereby, as shown in FIG. 5A, a second image including the region of interest 5a is displayed on the sub-monitor 109b.

FIG. 5B shows a case where a second image including a region of interest is superimposed on the first image. Similar to the example shown in FIG. 5A, also in the example shown in FIG. 5B, the monitor 109 has multiple sub-monitors 109a and 109b. As shown in FIG. 5B, the sub-monitor 109a displays the first image collected by receiving the display of the first image. In such a case, the UI control circuit 205 turns the switch A shown in FIG. 4 to the a side. Here, when the region of interest 5a is set in the first image (read out from the disk 204), the UI control circuit 205 determines whether the region of interest is included in the second image. determine whether or not When the image processing circuit 202 determines that the region of interest is included in the second image, the switch A shown in FIG. 4 is turned to the c side. The image processing circuit 202 outputs the first image read from the disk 204 to the synthesizing circuit 206 , reads the second image including the region of interest from the disk 203 , and outputs the second image to the synthesizing circuit 206 . As a result, as shown in FIG. 5B, a composite image in which the second image 5b including the region of interest 5a is superimposed on the first image is displayed on the sub-monitor 109a. In this case, no image is displayed on the sub-monitor 109b. The position of superimposition of the second image 5b can be set as any position where the display of the area of the region of interest 5a is not obstructed on the monitor 109a.

FIG. 6 is a flow chart showing a processing procedure by the X-ray image acquisition device 110 according to the first embodiment. FIG. 6 shows a flowchart for explaining the operation of the entire X-ray image acquisition apparatus 110, and explains which step in the flowchart each component corresponds to. Note that the processing shown in FIG. 6 will be described as being executed after receiving the display of the first image and acquiring the first image.

Step S<b>101 is a step implemented by the image processing circuit 202 . In step S101, the image processing circuit 202 displays the first image. Step S<b>102 is a step implemented by the UI control circuit 205 . In step S102, the UI control circuit 205 receives setting of a region of interest in the first image. As a result, the UI control circuit 205 causes the image processing circuit 202 to execute the complementing process.

Step S<b>103 is a step implemented by the image processing circuit 202 . In step S103, the image processing circuit 202 determines whether the region of interest is included in the second image. Here, if the image processing circuit 202 does not determine that the region of interest is included in the second image (step S103, No), the process ends.

On the other hand, when the image processing circuit 202 determines that the region of interest is included in the second image (step S103, Yes), the process proceeds to step S104. Step S<b>104 is a step implemented by the image processing circuit 202 . In step S104, the image processing circuit 202 displays a second image that complements the first image.

As mentioned above, in the first embodiment, the second photodetector 106b has a higher resolution than the first photodetector 106a. In the first embodiment, when displaying the first image on the monitor 109, the X-ray image acquisition apparatus 110 detects that the region of interest set in the first image is within the field of view of the second detector 106e. , a second image containing the region of interest is also displayed. As a result, according to the first embodiment, for example, when the operator wants to observe the region of interest in more detail after confirming the first image, the operator can obtain a high-resolution image without reacquiring the image. It becomes possible to observe the image of the region of interest. Further, according to the first embodiment, the operator does not need to acquire images again, so the operator can improve the efficiency of the examination. Furthermore, according to the first embodiment, since it is not necessary to re-acquire images, it is possible to reduce the X-ray exposure of the subject and reduce the burden of examination on the subject. becomes possible.

Although the X-ray image acquisition device 110 has the synthesizing circuit 206 in the above embodiment, the embodiment is not limited to this. For example, the X-ray image acquisition device 110 may be configured without the combining circuit 206 .

Also, the X-ray image acquisition apparatus 110 may display the entire second image, or may display a portion of the second image. For example, the X-ray image acquisition device 110 first determines whether the region of interest set in the first image exists within the field of view of the second detector 106e. Now, if the region of interest is within the field of view of the second detector 106e, the X-ray image acquisition device 110 recalls the second image stored in association with the first image. X-ray image acquisition device 110 then compares the resolution of the second image with the resolution of monitor 109 . Here, if the resolution of the monitor 109 is higher than the resolution of the second image, the X-ray image acquisition device 110 causes the monitor 109 to display the entire second image.

On the other hand, if the resolution of the monitor 109 is lower than the resolution of the second image, the X-ray image acquisition device 110 causes the monitor 109 to display a portion of the second image. For example, the X-ray image acquisition apparatus 110 accepts an operation of selecting a region including the region of interest in the second image, and causes the monitor 109 to display the selected region. For example, the X-ray image acquisition apparatus 110 first receives from the operator a specification of a crop area including an area centered on the region of interest in the second image. Next, the X-ray image acquisition device 110 adjusts the number of pixels in the cropping area with an enlargement ratio according to the ratio between the number of pixels (matrix size) of the monitor 109 and the number of pixels in the cropping area. That is, the X-ray image acquisition device 110 resizes the crop area according to the resolution of the monitor 109. FIG. Then, the X-ray image acquisition apparatus 110 causes the monitor 109 to display the cropped area after adjustment.

Thereby, the X-ray image acquisition device 110 can present the second image to the operator at the original resolution of the second image. Specifically, when the resolution of the monitor 109 is lower than the resolution of the second image and the entire second image is displayed on the monitor 109, the second image is lowered according to the resolution of the monitor 109. displayed at a higher resolution. On the other hand, when a part of the second image is displayed according to the relationship between the resolution of the second image and the resolution of the monitor 109, the second image is displayed while maintaining the resolution.

Further, in the above-described embodiment, a case has been described in which a second image corresponding to a partial region of the first image is displayed by setting the region of interest while the first image is being displayed. However, embodiments are not so limited.

For example, while displaying the first image, the X-ray image acquisition device 110 displays a second image corresponding to a partial region of the first image by a predetermined trigger other than the setting of the region of interest. It may be displayed. Here, an example of a predetermined trigger other than the setting of the region of interest is, for example, a designation operation of designating a position on the first image. For example, the operator operates a mouse included in the input interface 130 and clicks a position of interest on the first image to perform the specifying operation. Further, for example, when the input interface 130 and the monitor 109 are integrated by a touch panel, the operator performs a designation operation by tapping a position of interest on the first image displayed on the touch panel.

Note that the predetermined trigger is set and stored in the storage circuit, for example, before the first image is displayed. For example, the X-ray image acquisition apparatus 110 starts displaying the first image, reads the setting information of a predetermined trigger from the storage circuit, and compares the operation received from the operator with the setting information to obtain a predetermined trigger. Determine whether or not the trigger has been received.

If a predetermined trigger is received while displaying the first image, the X-ray image acquisition device 110 displays a second image corresponding to a partial area of the first image. For example, the X-ray image acquisition device 110 recalls a second image stored in association with the first image if the location specified in the first image is within the field of view of the second detector 106e. to display the second image.

Further, in the above-described embodiment, when the first image is displayed on the monitor 109, according to the positional relationship between the region of interest set in the first image and the field of view of the second photodetector 106e , the second image including the region of interest is further displayed. However, embodiments are not so limited.

For example, the X-ray image acquisition device 110 may retrieve the second image stored in association with the first image if the region of interest established in the first image is within the field of view of the second detector 106e. A second image may be displayed instead of the first image. That is, while displaying the first image on the monitor 109, the X-ray image acquisition apparatus 110 adjusts the positional relationship between the region of interest set in the first image and the field of view of the second photodetector 106e. Accordingly, the second image may be displayed instead of the first image.

Further, in the above-described embodiment, a case has been described in which the purpose is to display a past image, but the embodiment is not limited to this. For example, the above-described embodiments are also applicable when the purpose is to display an image being acquired in real time. In such a case, if it is desired to display the first image and the second image at the same time, both images may be output to the respective monitors 109 at the same time. When displaying the first and second images simultaneously in this way, the first detector and the second detector are switched very quickly.

(Second embodiment)
In the first embodiment, when the first image generated from the electrical signal output by the first photodetector 106a is displayed on the monitor 109, the second photodetector supplements a partial region of the first image. The case of displaying the image of . In the second embodiment, when the second image generated from the electrical signal output by the second photodetector 106b is displayed on the monitor 109, the first photodetector compensates for a partial region of the second image. will be described. FIG. 7 is a diagram for explaining the second embodiment.

FIG. 7 shows a case where the operator designates display of the second image via the input interface 130 . State 1 in FIG. 7 shows an example of the second image designated by the operator. Here, for example, in the X-ray diagnostic apparatus 100, the second FPD has a narrower X-ray dynamic range than the first FPD when using a CMOS sensor to obtain high resolution, and is easily saturated. have characteristics. For example, as shown in state 1 of FIG. 7, the second image may include an image saturated region 7a. Here, it is assumed that the operator desires to confirm the information of this image saturation area 7a.

State 2 in FIG. 7 shows an example of the second image when an instruction is received from the operator via the input interface 130 to the effect that the information on the image saturation region 7a is desired to be confirmed. In such a case, when displaying the second image on the monitor 109, the X-ray diagnostic apparatus 100 displays the first image to compensate for the saturated region of the second image if the second image is saturated. Execute completion processing to display . For example, the X-ray diagnostic apparatus 100 sets the image saturation region 7a of the second image to the image saturation region 7a of the second image in the first image without saturation, as shown in state 2 in FIG. is replaced with the region 7b corresponding to . The complementing process according to the second embodiment will be described continuously with reference to FIG. 7 .

State 3 of FIG. 7 shows an example of the first image acquired by the first FPD while acquiring the second image. As shown in state 3 of FIG. 7, a region 7b corresponding to the image saturation region 7a of the second image is identified in the first image, and it is confirmed that this region 7b is not saturated.

State 4 in FIG. 7 shows pre-processing that is performed before complement processing. In the pre-processing, the area 7b used for the complementing process is set, and the resizing process and the process of multiplying the gain coefficient are performed. Then, the predetermined area 7b of the preprocessed first image is replaced with the corresponding position in the second image, as shown in state 2 of FIG. 7, for example. Complementary processing for displaying the other image that compensates for a partial area of such an image is performed by the X-ray image acquisition device 110a. Details of the complementary processing by the X-ray image acquisition device 110a will be described below with reference to FIG. Note that the X-ray image acquisition device 110a is an example of a control unit.

Note that the overall configuration of the X-ray diagnostic apparatus 100 according to the second embodiment is shown in FIG. 1, the description is omitted here. FIG. 8 is a block diagram showing a configuration example of an X-ray image acquisition device 110a according to the second embodiment. Note that FIG. 8 also shows the X-ray source 103, the X-ray detector 106, the X-ray detector control device 120, the monitor 109, and the input interface 130 for convenience of explanation. As shown in FIG. 8, in the X-ray detector 106, the first FPD is provided closer to the X-ray source 103 than the second FPD.

In the example shown in FIG. 8, transmission of images from the X-ray detector control device 120 to the X-ray image acquisition device 110a uses a common data line for the first image and the second image. However, the embodiment is not limited to this. For example, the transmission of images from the X-ray detector controller 120 to the X-ray image acquisition device 110a may be parallel, using dedicated data lines for the first and second images.

The X-ray image acquisition apparatus 110a according to the second embodiment includes, as shown in FIG. and circuit 210 .

The FPD control circuit 201 controls the readout timing of electric signals by the X-ray detector 106 via the X-ray detector control device 120 . The image processing circuit 202 a acquires image data output from the X-ray detector control device 120 via the image synthesizing circuit 210 . The image processing circuit 202a performs image processing on the acquired image data. Disk 203 stores the X-ray images. For example, disk 203 is an HDD and stores the second image. Disk 204 stores the X-ray images. For example, disk 204 is an HDD and stores the first image. In the example shown in FIG. 8, the case where the X-ray image acquisition device 110a includes the second image disk 203 and the first image disk 204 will be described. and the second image may share one disk.

The input interface 130 receives instructions from the operator and transfers the received instructions to the UI control circuit 205 . The UI control circuit 205 causes the image processing circuit 202a to display an image for which an instruction is received from the operator via the input interface 130 . For example, when receiving the display of the first image, the UI control circuit 205 turns the switch B to the b side. Accordingly, the image processing circuit 202a causes the monitor 109 to display the first image. Further, for example, when the UI control circuit 205 accepts display of the second image, the UI control circuit 205 turns the switch B to the a side. Accordingly, the image processing circuit 202a causes the monitor 109 to display the second image.

Also, the UI control circuit 205 receives an instruction to execute the complementing process from the operator via the input interface 130, and causes the image processing circuit 202a to execute the complementing process. For example, the UI control circuit 205 causes the image processing circuit 202a to execute the complementing process when receiving the setting of the complementing process from the operator via the input interface 130 while the second image is being displayed. When the image processing circuit 202a receives an instruction to perform the complementing process, the image processing circuit 202a may independently display the second image and the first image that compensates for the saturated region of the second image, for example. Then, a synthesized image in which the saturated region of the second image is replaced with the first image may be displayed. Here, this synthesized image is generated by the image synthesizing circuit 210 . Therefore, before describing the details of the complementing process by the image processing circuit 202a, the synthetic image generation process by the image synthesizing circuit 210 will be described.

When the image synthesizing circuit 210 receives an instruction to execute the complementing process, the second image generated from the electrical signal output from the second photodetector 106b is displayed on the monitor 109. is replaced with the first image to generate a synthesized image. More specifically, when displaying the second image on the monitor 109, if the second image is saturated, the image synthesizing circuit 210 replaces the saturated region of the second image with the first image. Generate a composite image that replaces the image.

The image composition circuit 210 has a saturation detection circuit 211 , a saturation detection circuit 212 , a resizing circuit 213 and a composition circuit 214 . The saturation detection circuit 212 transfers the second image data output by the X-ray detector control device 120 to the image processing circuit 202a. The saturation detection circuit 212 also receives the second image output by the X-ray detector control device 120 and determines whether the received second image is saturated. Here, when the saturation detection circuit 212 determines that the second image is saturated, the switch A2 is turned to the a side. In such a case, compositing circuit 214 will generate a composite image if the first image is not saturated. If the saturation detection circuit 212 does not determine that the second image is saturated, it switches the switch A2 to the b side. In such cases, the compositing circuit 214 does not generate a composite image.

The saturation detection circuit 211 transfers the first image data output by the X-ray detector control device 120 to the image processing circuit 202a. The saturation detection circuit 211 also receives the first image output by the X-ray detector control device 120 and determines whether the received first image is saturated. Here, when the saturation detection circuit 211 does not determine that the first image is saturated, the switch A1 is turned to the b side. In such a case, the compositing circuit 214 will generate a composite image when the second image is saturated. When the saturation detection circuit 211 determines that the first image is saturated, it switches the switch A1 to the a side. In such cases, the compositing circuit 214 does not generate a composite image even if the second image is saturated.

The resizing circuit 213 cuts out a specific portion of the first image and corrects the pixel pitch of the first image when the switch A1 is tilted to the b side and the switch A2 is tilted to the a side. For example, the pixel pitch of the first FPD and the pixel pitch of the second FPD are different. More specifically, the second photodetector 106b has a higher resolution than the first photodetector 106a. Therefore, the resizing circuit 213 corrects the first image so that the pixel pitch of the first image matches the pixel pits of the second image.

The synthesizing circuit 214 replaces the second image with the first image at a predetermined position of the second image to generate a synthesized image. For example, the compositing circuit 214 corrects the pixel pitch of the first image to replace saturated regions of the second image. Also, although the first image originally has a low resolution, it has more valuable information than the second image, which is saturated and has no information. Treatment has an effect. Here, the synthesizing circuit 214 replaces the first image by multiplying it by a coefficient corresponding to the sensitivity difference between the first photodetector 106a and the second photodetector 106b. That is, the synthesizing circuit 214 may generate a synthesized image after multiplying the gain coefficients so as to achieve a more natural synthesis during the synthesizing process. The combining circuit 214 passes the generated combined image to the image processing circuit 202a.

As described above, when the image processing circuit 202a receives an instruction to perform the complementing process, for example, the second image and the first image that compensates for the saturated region of the second image are independently processed. Alternatively, a synthesized image obtained by replacing the saturated region of the second image with the first image may be displayed. 9A and 9B are diagrams for explaining the second embodiment.

FIG. 9A shows a case where the second image and the first image that supplements the saturated region of the second image are displayed independently. In the example shown in FIG. 9A, monitor 109 has multiple sub-monitors 109a and 109b. As shown in FIG. 9A, the sub-monitor 109a displays the second image collected upon receiving the display of the second image. In such a case, the UI control circuit 205 turns the switch B shown in FIG. 8 to the a side. Then, when the second image is saturated, the UI control circuit 205 turns the switch B shown in FIG. 8 to the b side. In such a case, the image processing circuit 202a outputs to the monitor 109 the first image that compensates for the saturated area of the second image. As a result, the first image is displayed on the sub-monitor 109b as shown in FIG. 9A.

FIG. 9B shows a case of displaying a composite image in which the saturated region of the second image is replaced with the first image. Similar to the example shown in FIG. 9A, also in the example shown in FIG. 9B, the monitor 109 has multiple sub-monitors 109a and 109b. As shown in FIG. 9B, the sub-monitor 109a displays the second image collected by accepting the display of the second image. In such a case, the UI control circuit 205 turns the switch B shown in FIG. 8 to the a side. Here, when the second image is saturated, the UI control circuit 205 turns switch B shown in FIG. 8 to the c side. In such a case, as shown in FIG. 9B, the image processing circuit 202a displays a synthesized image obtained by replacing the saturated area of the second image with the first image on the sub-monitor 109a. In this case, no image is displayed on the sub-monitor 109b. Further, as shown in FIG. 9B, for example, the image processing circuit 202a may further display information indicating the replaced area. The example of FIG. 9B shows a case where information 9a indicating the composite area is overlaid.

FIG. 10 is a flow chart showing a processing procedure by the X-ray image acquisition device 110a according to the second embodiment. FIG. 10 shows a flowchart for explaining the operation of the entire X-ray image acquisition apparatus 110a, and explains which step in the flowchart each component corresponds to. It should be noted that the processing shown in FIG. 10 will be described as being executed in real time when an instruction for complementing processing is received while the second image is being collected. Note that FIG. 10 shows a case of displaying a synthesized image in which the saturated region of the second image is replaced with the first image.

Steps S201 and S202 are steps implemented by the saturation detection circuit 212 . In step S201, the saturation detection circuit 212 determines whether saturation of the second image has been detected. Here, if the saturation detection circuit 212 does not determine that the saturation of the second image has been detected (step S201, No), the process ends. On the other hand, when the saturation detection circuit 212 determines that saturation of the second image has been detected (step S201, Yes), it identifies saturated pixels (step S202).

Steps S203 and S204 are steps implemented by the saturation detection circuit 211 . In step S203, the saturation detection circuit 211 determines whether saturation of the first image has been detected. If the saturation detection circuit 211 determines that saturation of the first image has been detected (step S203, Yes), the process ends. On the other hand, if the saturation detection circuit 211 does not determine that saturation of the first image has been detected (step S203, No), it identifies pixels in the first image corresponding to pixels identified in the second image. (Step S204).

Step S<b>205 is a step implemented by the resizing circuit 213 . In step S205, the resizing circuit 213 resizes the first image. Step S<b>206 is a step implemented by combining circuit 214 . In step S206, the composition circuit 214 generates a composite image. Step S207 is a step implemented by the image processing circuit 202a. In step S207, the image processing circuit 202a displays the synthesized image.

As described above, in the second embodiment, the first photodetector 106a has a wider dynamic range and is less saturated than the second photodetector 106b. Thus, the first image may not be saturated even when the second image is saturated. Therefore, in the second embodiment, when the second image is displayed on the monitor 109, the X-ray image acquisition device 110a displays the saturated second image. A first image that fills the region is displayed. Thus, according to the second embodiment, for example, even when the second image is saturated when observing the second image, the operator compensates for the saturated region with the first image. This makes it possible to observe information in saturated regions in the second image. Further, according to the second embodiment, it is not necessary to reacquire images (by changing the X-ray irradiation conditions, etc.), so the operator can improve the efficiency of the examination. Furthermore, according to the second embodiment, since it is not necessary to re-acquire images, it is possible to reduce the X-ray exposure of the subject and reduce the burden of examination on the subject. becomes possible.

In the second embodiment described above, the display form shown in FIG. 9A and the display form shown in FIG. 9B have been described, but the embodiment is not limited to this. For example, the image processing circuit 202a may switch between the display form shown in FIG. 9A and the display form shown in FIG. 9B as appropriate according to the operator's instruction.

(Modification of Second Embodiment)
In the second embodiment described above, when the second image is saturated when the second image is displayed on the monitor 109, the first image that compensates for the saturated region of the second image is displayed. The case of executing complementary processing to display has been described. Here, in the above-described second embodiment, the second image is used to determine whether or not the second image is saturated.

By the way, the first FPD has a wider dynamic range than the second FPD. Thus, even when the second image is saturated, the first image may not be saturated. Therefore, the X-ray diagnostic apparatus 100 can use the first image to determine whether the second image is saturated. For example, the X-ray diagnostic apparatus 100 determines that the second image is saturated when the pixel value of the first image is equal to or greater than a predetermined value although the first image is not saturated. Therefore, in a modified example of the second embodiment, a case will be described in which it is determined whether or not the second image is saturated using the first image. Then, in the modified example of the second embodiment, when it is determined that the second image is saturated, by changing the drive rate of the second photodetector 106b, saturation of the second image is detected. to eliminate

Note that the modified example of the second embodiment is the same as the X-ray image acquisition device 110a according to the second embodiment, except that some components of the X-ray image acquisition device 110a have additional functions. is. Therefore, in the modified example of the second embodiment, only points different from the second embodiment will be described.

The saturation detection circuit 211 receives the first image output by the X-ray detector control device 120 and uses the received first image to determine whether the second image is saturated. Here, when the saturation detection circuit 211 determines that the second image is saturated, it instructs the FPD control circuit 201 via the UI control circuit 205 to change the driving rate of the second photodetector 106b. to output

When the FPD control circuit 201 receives an instruction to change the drive rate of the second photodetector 106b from the saturation detection circuit 211 via the UI control circuit 205, the FPD control circuit 201 controls the X-ray detector control device 120 to change the driving rate of the second photodetector 106b. 2, the driving rate of the photodetector 106b is changed. In other words, the X-ray detector control device 120 changes the readout timing of the electrical signal by the second photodetector 106b when it is determined that the second image is saturated. 11A and 11B are diagrams for explaining a modification of the second embodiment.

FIG. 11A illustrates the electrical signal output processing by the second photodetector 106b before changing the timing. In other words, it shows the timing of the electrical signal readout by the second photodetector 106b when the second image is not saturated.

When an X-ray image is acquired by irradiating pulsed X-rays, the second photodetector 106b has a storage period for accumulating charges generated during X-ray pulse irradiation and a storage period during non-irradiation of X-ray pulses. A readout period for reading out the charge signal is set. For example, the second photodetector 106b outputs the X-ray signal by reading out the charge signal in the readout period after the storage period. The X-ray detector control device 120 then uses the collected X-ray signals to generate an X-ray image.

Here, when it is determined that the second image is saturated, the X-ray detector control device 120 changes the readout timing of the electrical signal by the second photodetector 106b. FIG. 11B describes the electrical signal output processing by the second photodetector 106b after changing the timing. In other words, it shows the timing of reading the electrical signal by the second photodetector 106b when the second image is saturated.

As shown in FIG. 11B, the second photodetector 106b continuously performs constant high-speed reading regardless of the X-ray incidence period or non-incidence period to sequentially obtain output signals. For example, the second photodetector 106b reads out the charge signal accumulated in the photodiode multiple times during one pulsed X-ray irradiation without providing a storage period. In other words, the second photodetector 106b read out one X-ray pulse in small pieces by driving corresponding to a high collection rate by CMOS-FPD, and outputs an output signal for each. Then, the second photodetector 106b collects X-ray signals from the output signals and adds the collected X-ray signals to obtain an X-ray signal for one frame. Each output signal obtained by reading one X-ray pulse in small pieces is also called a "child frame".

Then, when it is determined that the second image is saturated, the X-ray detector control device 120 adds the "child frames" to generate the second image in non-saturated units. Note that the X-ray detector control device 120 can apply the technique described in Japanese Patent Application Laid-Open No. 2016-87217 when adding the “child frames” to generate the second image in units without saturation. It is possible.

FIG. 12 is a flow chart showing a processing procedure by the X-ray image acquisition device 110a according to the modification of the second embodiment. FIG. 12 shows a flowchart for explaining the operation of the entire X-ray image acquisition device 110a, and explains which step in the flowchart each component corresponds to. Note that the processing shown in FIG. 12 will be described as being executed in real time when an instruction to change the drive rate is received while the second image is being acquired.

Step S<b>301 is a step implemented by the UI control circuit 205 . In step S301, the UI control circuit 205 determines whether or not selection of display of the second image has been received. Here, if the UI control circuit 205 does not determine that the selection of the display of the second image has been received (step S301, No), the process ends. On the other hand, when the UI control circuit 205 determines that the selection of display of the second image has been received (step S301, Yes), the process proceeds to step S302.

Steps S<b>302 and S<b>303 are steps implemented by the saturation detection circuit 211 . At step S302, the saturation detection circuit 211 determines the saturation of the second image using the first image. Then, in step S303, the saturation detection circuit 211 determines whether saturation of the second image has been detected. Here, if the saturation detection circuit 211 does not determine that the saturation of the second image has been detected (step S303, No), the process ends.

On the other hand, when the saturation detection circuit 211 determines that the saturation of the second image has been detected (step S303, Yes), the process proceeds to step S304. Step S<b>304 is a step implemented by the FPD control circuit 201 . In step S304, the FPD control circuit 201 changes the driving rate of the second detector 106e.

As described above, in a variation of the second embodiment, the first photodetector 106a has a wider dynamic range than the second photodetector 106b. Thus, the first image may not be saturated even when the second image is saturated. Therefore, in a modification of the second embodiment, the X-ray image acquisition device 110 uses the first image to determine whether the second image is saturated. Then, in the modification of the second embodiment, the X-ray image acquisition device 110a changes the drive rate of the second photodetector 106b when determining that the second image is saturated. Thereby, in the modification of the second embodiment, the X-ray detector control device 120 generates a second image without saturation. Thus, according to the modification of the second embodiment, for example, even when the second image is saturated when the operator observes the second image, the operator can drive the second photodetector 106b. By changing the rate, it becomes possible to observe a second image without saturation. Moreover, according to the modification of the second embodiment, the operator does not need to acquire images again, so the operator can improve the efficiency of the examination. Furthermore, according to the modified example of the second embodiment, it is not necessary to reacquire images, so that X-ray exposure to the subject can be reduced and the burden of examination on the subject can be reduced. It becomes possible to Note that confirmation of the presence or absence of saturation in the second image can also be performed by determining whether or not the value of each pixel in the second image has reached a preset saturation value.

(Other embodiments)
Embodiments are not limited to the embodiments described above.

In the above-described first embodiment, when the image processing circuit 202 receives the display of the second image and displays the collected second image, the image that compensates for the outside of the visual field region of the second image is displayed. , the first image may be displayed. In such a case, the image processing circuit 202 may independently display the second image and the first image including the area outside the field of view of the second image, or display the second image on the second image. It is also possible to synthesize and display an image that compensates for the outside of the visual field area.

Further, in the above-described embodiments, as shown in FIGS. 4 and 8, etc., in the X-ray detector 106, the first FPD is provided closer to the X-ray source 103 than the second FPD. Embodiments are not so limited. For example, in the X-ray detector 106, a second FPD may be provided closer to the X-ray source 103 than the first FPD.

Further, in the above-described embodiment, the case of displaying the first image and the second image independently and the case of displaying a synthesized image obtained by synthesizing the first image and the second image have been described. , the embodiments are not limited thereto. For example, the first image, the second image, and the composite image may be displayed independently. Alternatively, any two images of the first image, the second image, and the composite image may be displayed independently.

Further, in the above-described embodiment, the X-ray image acquisition device 110 (110a) has been described as having each circuit, but the embodiment is not limited to this. For example, the X-ray image acquisition device 110 (110a) is a processor, and reads and executes a program stored in a memory circuit to obtain the X-ray image acquisition device 110 shown in FIG. 4 and the X-ray image shown in FIG. It may perform similar functions as collector 110a. In such a case, each processing function executed by the processor is recorded in the memory circuit in the form of a computer-executable program. The processor reads out each program from the storage circuit and executes it, thereby realizing functions corresponding to each program. In other words, the processor with each program read has the same functions as the circuits shown in the X-ray image acquisition device 110 shown in FIG. 4 and the X-ray image acquisition device 110a shown in FIG. becomes.

The term "processor" used in the above description is, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), or an application specific integrated circuit (ASIC), a programmable logic device (for example, Circuits such as Simple Programmable Logic Device (SPLD), Complex Programmable Logic Device (CPLD), and Field Programmable Gate Array (FPGA)). The processor realizes its functions by reading and executing the programs stored in the memory circuit. It should be noted that instead of storing the program in the memory circuit, the program may be directly installed in the circuit of the processor. In this case, the processor realizes its function by reading and executing the program embedded in the circuit. Note that each processor of the present embodiment is not limited to being configured as a single circuit for each processor, and may be configured as one processor by combining a plurality of independent circuits to realize its function. good. Furthermore, a plurality of components in FIGS. 4 and 8 may be integrated into one processor to realize its functions.

In the description of the above embodiments, each component of each device illustrated is functionally conceptual, and does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution and integration of each device is not limited to the illustrated one, and all or part of them can be functionally or physically distributed and integrated in arbitrary units according to various loads and usage conditions. Can be integrated and configured. Further, each processing function performed by each device may be implemented in whole or in part by a CPU and a program analyzed and executed by the CPU, or implemented as hardware based on wired logic.

Further, the control method described in the above embodiment can be realized by executing a prepared control program on a computer such as a personal computer or a workstation. This control program can be distributed via a network such as the Internet. In addition, this control program is recorded on a computer-readable recording medium such as a hard disk, flexible disk (FD), CD-ROM, MO, DVD, etc., and can be executed by being read from the recording medium by a computer.

According to at least one of the embodiments described above, it is possible to supplement a partial area of the image to be displayed.

While several embodiments of the invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

100 X-ray diagnostic device 106 X-ray detector 110 X-ray image acquisition device

Claims (15)

an X-ray detector having a first detection unit and a second detection unit capable of simultaneously detecting X-rays emitted from an X-ray tube;
When displaying on a display unit one of a first image based on the output of the first detection unit and a second image based on the output of the second detection unit, one of the one image a control unit that displays the other image corresponding to the region of the
with
The second detection unit has a higher resolution than the first detection unit,
When displaying the first image on the display unit, the control unit adjusts the area of interest according to the positional relationship between the region of interest set in the first image and the field of view of the second detection unit. An X-ray diagnostic apparatus , wherein the second image including the region is superimposed on the first image at a position that does not overlap with the region of interest appearing in the first image . an X-ray detector having a first detection unit and a second detection unit capable of simultaneously detecting X-rays emitted from an X-ray tube;
When displaying on a display unit one of a first image based on the output of the first detection unit and a second image based on the output of the second detection unit, one of the one image a control unit that displays the other image corresponding to the region of the
with
The first detection unit has a wider dynamic range than the second detection unit,
When displaying the second image on the display unit, if the second image is saturated, the control unit displays the first image corresponding to the saturated region of the second image. An X-ray diagnostic device that displays images . When displaying the second image on the display unit, if the second image is saturated, the control unit replaces the saturated region of the second image with the first image. 3. The X-ray diagnostic apparatus of claim 2 , displaying the replaced composite image. the second detection unit has a higher resolution than the first detection unit;
4. The X-ray diagnostic apparatus according to claim 3 , wherein said control unit corrects a pixel pitch of said first image and replaces it with a saturated region of said second image. 4. The X-ray diagnostic apparatus according to claim 2 , wherein said control section multiplies said first image by a coefficient according to a sensitivity difference between said first detection section and said second detection section. The X-ray diagnostic apparatus according to any one of claims 3 to 5 , wherein said control unit further displays information indicating the replaced area. 3. The X-ray diagnostic apparatus according to claim 2 , wherein said control unit independently displays said second image and said first image corresponding to a saturated region of said second image. The X-ray detector has a scintillator that converts X-rays into light, and a first photodetector and a second photodetector that share the scintillator and detect light converted by the scintillator. ,
The first detection unit includes the scintillator and the first photodetector,
The second detection unit includes the scintillator and the second photodetector,
The first photodetector and the second photodetector according to any one of claims 1 to 7 , wherein the X-rays are simultaneously detected by simultaneously detecting the light converted by the scintillator. X-ray diagnostic equipment. 9. The X-ray diagnostic apparatus according to claim 8 , wherein said scintillator is arranged so as to be sandwiched between said first photodetector and said second photodetector. 9. The X-ray diagnostic apparatus according to claim 8 , wherein said first photodetector has a larger field size than said second photodetector. A scintillator that converts X-rays emitted from an X-ray tube into light, and a first photodetector and a second light that share the scintillator and detect light converted by the scintillator and output an electrical signal. an X-ray detector having a detector;
any one of a first image generated from the electrical signal output by the first photodetector and a second image generated from the electrical signal output by the second photodetector; and a control unit for displaying on the display unit,
The control unit determines whether or not the second image is saturated using the first image, and determines that the second image is saturated if the second image is saturated. An X-ray diagnostic apparatus that changes the drive rate of a photodetector. 12. The X-ray diagnostic apparatus according to claim 11 , wherein said first photodetector has higher detection sensitivity than said second photodetector. an X-ray detector having a first detection unit and a second detection unit capable of simultaneously detecting X-rays emitted from an X-ray tube;
a control unit that associates a first image based on the output of the first detection unit and a second image based on the output of the second detection unit and stores them in a storage unit;
with
The second detection unit has a higher resolution than the first detection unit,
The control unit, while displaying the first image on the display unit, controls the positional relationship between the region of interest set in the first image and the field of view of the second detection unit, and the an X-ray diagnostic apparatus that displays all or part of the second image according to the relationship between the resolution of the second image and the resolution of the display unit. The X-ray detector has a scintillator that converts X-rays into light, and a first photodetector and a second photodetector that share the scintillator and detect light converted by the scintillator. ,
The first detection unit includes the scintillator and the first photodetector,
The second detection unit includes the scintillator and the second photodetector,
14. The X-ray diagnostic apparatus according to claim 13 , wherein said first photodetector and said second photodetector simultaneously detect X-rays by simultaneously detecting light converted by said scintillator. When one of the first image and the second image is displayed on the display unit, the control unit replaces the one image by a predetermined trigger with the one image. 15. The X-ray diagnostic apparatus according to claim 13 or 14 , wherein the other image corresponding to a partial area of the is displayed.

Images