JP2014004465A - Image processing apparatus, x-ray diagnostic apparatus and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow an accurate operation position for a region periodically moving to be easily grasped.SOLUTION: An image processing apparatus comprises a display section that performs display of X-ray images collected in real time on the basis of X-rays irradiated from an X-ray tube and transmitted through a body to be inspected and display of images obtained by cutting out partial regions extracted and automatically detected from the X-ray images and enlarging the partial regions cut out in parallel. The display section displays a stent that is inside a blood vessel of the body to be inspected and has a position moved by heart beats such that the stent is viewed as if the stent were substantially stopped by switching and displaying the images cut out in response to a time interval at the time of collection.

Description

  The present invention relates to an image processing apparatus, an X-ray diagnostic apparatus, and a program for displaying a plurality of transmission images relating to a periodically moving region collected continuously by an X-ray diagnostic apparatus or the like.

In cardiac coronary intervention, a doctor refers to a still image (hereinafter referred to as a reference image) of a target site obtained by a prior angiography examination and the position of a guide wire by a fluoroscopic image obtained in real time. Confirm the operation. However, since the guide wire on the fluoroscopic image is displayed by moving with the heartbeat, there is a problem that it is difficult to grasp the positional relationship between the guide wire and the blood vessel on the reference image.
In addition, as a well-known document relevant to this application, there exist the following, for example.

JP-A-4-20333 Japanese Patent Laid-Open No. 2-99040

  As described above, when a device is operated on a periodically moving part such as the heart, the device moves and is displayed by a heartbeat on a fluoroscopic image displayed in real time. There is a problem that it is difficult to grasp the position.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an image processing apparatus, an X-ray diagnostic apparatus, and a program that make it possible to easily grasp an accurate surgical position for a periodically moving part. Yes.

In order to achieve the above object, the present invention takes the following measures.
The first aspect of the present invention is a display of an X-ray image collected in real time based on X-rays irradiated from an X-ray tube and transmitted through a subject, and a part automatically extracted and extracted from the X-ray image A display unit that performs parallel display of an image that has been cut out and enlarged, and the display unit displays the clipped image by switching according to a time interval at the time of collection. Provided is an image processing apparatus that displays a stent that moves within a blood vessel and moves according to a heartbeat so that the stent appears to be substantially stopped.

  According to a second aspect of the present invention, there is provided an X-ray tube that generates X-rays, an X-ray detector that detects X-rays irradiated from the X-ray tube and transmitted through a subject, and the X-ray detector. A display unit that performs parallel display of the X-ray image collected in real time based on the detected X-rays and the display of an image extracted from the X-ray image and automatically extracted from a partial area. The display unit switches the displayed image according to the time interval at the time of acquisition, and displays the stent that is in the blood vessel of the subject and whose position is moved by the heartbeat substantially stops. Thus, an X-ray diagnostic apparatus is provided.

  According to a third aspect of the present invention, a computer displays an X-ray image collected in real time based on X-rays emitted from an X-ray tube and transmitted through a subject, and is automatically extracted from the X-ray image. By executing a display process in parallel with displaying an enlarged image by cutting out the detected partial area, and in the display process, the cut image is switched and displayed according to a time interval at the time of collection. A program is provided for displaying a stent that is in the blood vessel of the subject and whose position is moved by a heartbeat so as to appear substantially stopped.

  As described above, according to the present invention, it is possible to provide an image processing apparatus, an X-ray diagnostic apparatus, and a program that make it possible to easily grasp an accurate treatment position for a part that moves periodically.

The figure which shows one Embodiment of the X-ray diagnostic apparatus provided with the image processing apparatus which concerns on this invention. 3 is a flowchart illustrating a procedure of image display processing according to the first embodiment. FIG. 10 is a diagram illustrating image display processing according to the first modification of the first embodiment. The flowchart which shows the process sequence of FIG. FIG. 10 is a diagram illustrating image display processing according to a second modification of the first embodiment. 6 is a flowchart showing the processing procedure of FIG. 5. FIG. 10 is a diagram illustrating an image display process according to a third modification of the first embodiment. The flowchart which shows the process sequence of FIG. FIG. 10 is a diagram illustrating image display processing according to the second embodiment. The flowchart which shows the process sequence of FIG. FIG. 10 is a diagram illustrating an example of a procedure of specific image processing in the second embodiment. FIG. 10 is a diagram illustrating an example of a procedure of specific image processing in the second embodiment. FIG. 10 is a diagram illustrating an example of specific image processing in the second embodiment. FIG. 10 is a diagram illustrating an example of specific image processing in the second embodiment. FIG. 10 is a diagram illustrating an example of specific image processing in the second embodiment. FIG. 10 is a diagram illustrating an example of specific image processing in the second embodiment. FIG. 10 is a diagram illustrating image display processing according to the third embodiment. FIG. 10 is a diagram illustrating another example of image display processing according to the third embodiment. The figure which shows the example of an image display displayed by a display control part. The figure which shows the example of an image display displayed by a display control part. The figure which shows the example of an image display displayed by a display control part. The figure which shows an example of the interface for designating a cardiac phase. The figure which shows an example of the interface for designating a cardiac phase. The figure which shows an example of the interface for designating a cardiac phase. The figure which illustrates the specific process of an image process part. The figure which illustrates the specific process of an image process part. The figure which illustrates the specific process of an image process part. The figure which illustrates the specific process of an image process part. The figure which illustrates the specific process of an image process part. The figure which illustrates the specific process of an image process part. The figure which shows the other modification in this embodiment. The flowchart which shows the process sequence of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, taking as an example the case where an image processing apparatus according to the present invention is applied to an X-ray diagnostic apparatus.

  As shown in FIG. 1, the X-ray diagnostic apparatus has a C-arm device 5. The C arm device 5 includes a C arm 16, a floor or ceiling suspension support mechanism that supports the C arm 16 so as to be rotatable about three orthogonal axes, and a rotational drive source. The X-ray tube 1 is attached to one end of the C arm 16. The X-ray control unit 4 applies a tube voltage between the electrodes of the X-ray tube 1 to generate X-rays from the X-ray tube 1 in accordance with the control of the system control unit 9, and the cathode filament of the X-ray tube 1 To supply a heating current. The X-ray detector 2 is attached to the other end of the C arm 16. The X-ray tube 1 and the X-ray detector 2 face each other with the subject P on the bed 3 interposed therebetween. The X-ray detector 2 is composed of, for example, a combination of an image intensifier and a TV camera. Alternatively, the X-ray detector 2 includes a flat panel detector (FPD: planar X-ray detector) having semiconductor detection elements arranged in a matrix. The C-arm movement control unit 6 supplies electric power to the drive source for rotating the C-arm 16 according to the control of the system control unit 9. Further, the bed moving mechanism 7 supplies power to the drive source for moving the bed 3 according to the control of the system control unit 9.

  In the present X-ray diagnostic apparatus, an electrocardiograph 10 is equipped to measure the subject P and generate an electrocardiogram. The image data storage unit 11 stores data relating to a plurality of transmission images generated by the X-ray detector 2 in association with cardiac phase data acquired from the electrocardiogram by the system control unit 9. The cardiac phase is defined as a scale that defines each time point in the period from the R wave of the electrocardiogram to the next R wave. Typically, the period from the R wave to the next R wave is 100%. Normalize and indicate each point in the period in percent.

  The plurality of projection images constitute a moving image, and are continuously captured over a plurality of heartbeat cycles, preferably at least three heartbeat cycles, at a speed of shooting 20 frames / second, that is, 20 frames per second. The electrocardiogram is measured in parallel with the photographing of the plurality of projection images, and the data of the plurality of projection images is stored in the image data storage unit 11 together with the data of the cardiac phase (%) specified by the system control unit 9. Further, the image data storage unit 11 stores a still image of the target part obtained by a prior angiographic examination or the like. The stored angiographic image is used as a reference image that is referred to by the doctor for confirming the blood vessel position and the like during the operation.

  The operation unit 8 is provided to transmit various commands from the user to the system control unit 9, and includes various input devices such as a keyboard and a mouse. The monitor 15 and the monitor 16 are configured by a CRT (cathode-ray tube), a liquid crystal display (LCD), or the like. For example, a fluoroscopic image collected in real time is displayed as a moving image on the monitor 15, and a reference image in which a target region such as an angiographic image is clearly displayed is displayed on the monitor 16. Both monitors are arranged side by side so that the user can observe the image.

  For example, in cardiac coronary intervention, a doctor confirms the position of the guide wire and performs an operation while observing a fluoroscopic image and a reference image collected in real time on the monitor 15 and the monitor 16. However, since the guide wire on the fluoroscopic image is displayed by moving with the heartbeat, there is a problem that it is difficult to grasp the positional relationship between the guide wire and the blood vessel on the reference image.

  Therefore, in the present embodiment, in order to realize a display that can easily grasp the positional relationship between the blood vessel and the guide wire without being affected by the heartbeat, the display image extraction unit 12, the image processing unit 13, and the display control are realized. A portion 14 is provided. The display image extraction unit 12 extracts a plurality of images having substantially the same phase in a cycle from a plurality of continuously collected transmission images. The display control unit 14 switches the plurality of extracted images according to the time interval at the time of collection (normal speed, double speed, etc.) and displays them on the monitor 16. Further, the image processing unit 13 performs specific image processing on the image extracted by the display image extraction unit 12 as necessary.

  Hereinafter, specific processing contents of the display image extraction unit 12, the image processing unit 13, and the display control unit 14 will be described according to each example for the image display realized by the present embodiment.

Example 1
In the first embodiment, one image (one frame) is extracted every one heartbeat (one cycle) from the image in phase with the reference image based on the electrocardiogram signal, and time-synchronized with a fluoroscopic image collected in real time. The image is superimposed on the reference image and displayed once in one cycle.

FIG. 2 is a diagram illustrating a procedure of image display processing in the first embodiment.
When a fluoroscopic X-ray generation operation is performed by the operator in the operation unit 8, the system control unit 9 instructs the display control unit 14 to display a fluoroscopic image in real time. In response to this instruction, the display control unit 14 displays a real-time fluoroscopic image on the monitor 15 using the fluoroscopic image data generated by the X-ray detector 2.

  Further, the system control unit 9 accepts selection of a reference image from angiographic images performed by the operator in the operation unit 8 (step S201). Based on the electrocardiogram signal, the display image extracting unit 12 extracts one image having the same phase as the selected reference image in one cycle (step S202). The display control unit 14 switches the image extracted by the display image extraction unit 12 once per period according to the time interval at the time of collection, and displays the image superimposed on the reference image on the monitor 16 (step S203).

  That is, on the monitor 16, the fluoroscopic image displayed in real time on the monitor 15 is time-synchronized, and the fluoroscopic image having the same phase as the reference image is updated and displayed once in one cycle, superimposed on the reference image. By doing so, the influence of the periodic movement is reduced, and the positional relationship between the device and the blood vessel can be easily grasped on the reference image.

(Modification 1 of Example 1)
In the first embodiment, one angiographic image selected by the operator is used as a reference image and displayed superimposed on this image. However, as shown in FIG. 3, an image having the same phase as the reference image is extracted and minimized. It can also be displayed superimposed on the value traced image. In this case, angiographic images for several heartbeats are stored in advance in the image data storage unit 11.

  Specifically, as shown in FIG. 4, processing in steps S401 to S403 described later is added between step S201 and step S202. When the reference image is selected by the operation unit 8, the operator is allowed to select whether or not to perform the minimum value tracing process (step S401). If it is selected that the minimum value trace processing is to be performed, at least one image having the same phase as the selected reference image is extracted (step S402), and a minimum value trace image is created using these images (step S403). . The display control unit 14 superimposes on the generated minimum value trace image, and displays the image extracted by the display image extraction unit 12 by switching it once per period according to the time interval at the time of collection. This is effective when, for example, there is a slow flow, there is a collateral circulation, or an optimal frame cannot be selected during contralateral imaging.

(Modification 2 of Example 1)
In the first embodiment, the image extracted by the display image extracting unit 12 is displayed by the normal superimposing process on the reference image. However, as shown in FIG. 5, the image extracted by the display image extracting unit 12 and the reference are displayed. It is also possible to display an image obtained by performing difference processing on the image.

  For example, as shown in FIG. 6, the following processing is performed instead of step S203 of FIG. When the difference processing setting is ON (step S601: ON), the image processing unit 13 performs a difference process between the image extracted by the display image extraction unit 12 and the reference image, and the display control unit 14 The difference-processed image is displayed on the monitor 16 (step S602). When the difference process setting is off (step S601: off), the display control unit 14 displays the normal superimposed image on the monitor 16 as in the first embodiment (step S603). In this way, the positional relationship between the guide wire and the blood vessel may be displayed more clearly.

(Modification 3 of Example 1)
In the first embodiment, only the heartbeat is used as the movement, but actually, movement by breathing or body movement is often included. In order to reduce such influence, as shown in FIG. 7, motion correction may be performed at the time of superimposing the extracted perspective image and the reference image.

  FIG. 8 shows a processing procedure of the third modification. In FIG. 8, the following processing is performed instead of step S203 of FIG. When the setting for performing the motion correction process is on (step S801: on), the image processing unit 13 performs motion correction between the image extracted for each cycle by the display image extraction unit 12 and the reference image ( In step S802), the display control unit 14 superimposes both images and displays them on the monitor 16 (step S803). For motion correction, for example, a diaphragm or a guide catheter is used as a reference. If the motion correction setting is off (step S801: off), the display control unit 14 displays a normal superimposed image on the monitor 16 as in the first embodiment (step S804). By doing so, the extracted fluoroscopic image and the reference image are displayed in a superimposed manner, so that the positional relationship between a device such as a guide wire and a blood vessel can be grasped more accurately.

(Example 2)
In cardiac annular artery intervention, an operation of placing a stent under fluoroscopy may be performed. Also in this case, the stent on the fluoroscopic image has a problem that it is difficult to grasp the position because it moves according to the heartbeat. Therefore, in the second embodiment, as shown in FIG. 9, one image having substantially the same phase is extracted for each period, a partial region of the extracted image is cut out, and a fluoroscopic image and time collected in real time are extracted. Display in sync. Further, the image of the cut out partial area is subjected to specific image processing and displayed. Specific processing includes, for example, background difference, histogram expansion, high pass filter, WW / WL, enlargement / reduction, minimum value / maximum value trace, and the like.

FIG. 10 is a diagram illustrating a procedure of image display processing according to the second embodiment. The apparatus configuration is the same as that shown in FIG. 1, and will be described with reference to FIG.
When a fluoroscopic X-ray generation operation is performed by the operator in the operation unit 8, the system control unit 9 instructs the display control unit 14 to display a fluoroscopic image in real time. In response to this instruction, the display control unit 14 displays a real-time fluoroscopic image on the monitor 15 using the fluoroscopic image data collected via the X-ray detector 2.

  In addition, the system control unit 9 accepts designation of a phase to be displayed and a partial region in the operation unit 8 (step S1001). Based on the electrocardiogram signal, the display image extraction unit 12 extracts one image of the specified phase in one cycle (step S1002), cuts out a specified partial region from the extracted image, and performs image processing. It supplies to the part 13 (step S1003). The image processing unit 13 performs predetermined specific image processing on the supplied partial region image (step S1004). The display control unit 14 displays the image after image processing on the monitor 16 by switching it once per cycle according to the time interval at the time of collection (step S1005).

  In this way, on the monitor 16, an image in which a partial area of the fluoroscopic image is enlarged is updated and displayed once per cycle in synchronization with the fluoroscopic image displayed on the monitor 15 in real time. The As a result, the current position of the stent can be displayed almost without being affected by the movement due to the heartbeat, and the stent appears to be almost stopped in the partial area image.

  Further, the normally collected fluoroscopic images cover a larger area than the portion to be observed. For this reason, in order to optimally display the fluoroscopic image without being too black or white, it is necessary to adjust the luminance so that all of the wide density values are appropriately displayed. Therefore, the density value of the portion to be observed is not always an easy-to-see density value. On the other hand, if only the part you want to observe is cut out, it will be distributed in a narrow density value range compared to the entire image, so it is possible to display the part you want to observe more easily by adjusting the brightness suitable for only that range It becomes. In other words, by performing image processing specialized for a partial area, an image that is easier to see than an image in which the entire image is optimized can be obtained.

  In the second embodiment, the method for extracting a partial region of the image is designated by the operator from the operation unit 8, but may be configured as follows. For example, a region with motion is automatically detected from the image, the detected region is presented to the operator as a candidate region, and the selected candidate region is set as a region to be cut out. Further, the size and position of the region to be cut out may be preset.

  In the second embodiment, the image processing unit 13 performs the specific image processing only on the extracted partial region image. However, as shown in FIG. 11A, the perspective image displayed in real time and the extracted partial image are displayed. It is also possible to display the region image by performing different processing. Further, as shown in FIG. 11B, the process A common to the original real-time fluoroscopic image may be performed, and the process B may be performed only on the extracted image.

  An example of specific image processing performed by the image processing unit 13 is shown in FIG. FIG. 12A shows a background difference processing procedure, and displays an image obtained by background difference based on a past image. FIG. 12B shows a histogram expansion processing procedure, which is a process of expanding the width of the density value. FIG. 12C shows the processing procedure of the high pass filter (High Pass Filter), and it is possible to extract only the high frequency components above the reference. FIG. 12D shows a processing procedure for window level optimization. Moreover, although the periodic motion is detected based on the electrocardiogram signal, the periodicity may be detected from the original real-time fluoroscopic image.

(Example 3)
The third embodiment extracts an image having substantially the same phase for each cycle from the collected fluoroscopic images, and displays the extracted images in time synchronization with the fluoroscopic images. The apparatus configuration is the same as that shown in FIG. 1, and will be described with reference to FIG.

  FIG. 13 is a diagram illustrating image display processing according to the third embodiment. When a fluoroscopic X-ray generation operation is performed by the operator in the operation unit 8, the system control unit 9 instructs the display control unit 14 to display a fluoroscopic image in real time. In response to this instruction, the display control unit 14 displays the real-time fluoroscopic image on the monitor 15 using the fluoroscopic image data collected via the X-ray detector 2 X-ray detector 2.

  In addition, when the system control unit 9 receives designation of the phase to be displayed on the operation unit 8, the system control unit 9 notifies the display image extraction unit 12 of the designated phase. Upon receiving this notification, the display image extraction unit 12 extracts one image of the specified phase (for example, 75% phase: RR75) in one cycle based on the electrocardiogram signal. The display control unit 14 displays the image after image processing on the monitor 16 by switching it once per cycle according to the time interval at the time of collection.

  By doing in this way, an image with a phase of 75% is updated and displayed once per cycle in synchronization with the fluoroscopic image displayed on the monitor 15 in real time. For example, as shown in FIG. 13, the extracted image 7 is displayed on the monitor 16 at the time when the real-time perspective image 7 is displayed on the monitor 15. Further, as shown in FIG. 14, the phase of the extracted image may be within a predetermined range. For example, even when RR75 is designated, the display image extraction unit 12 may extract an image between RR65 and RR85.

  Further, FIG. 15 shows a variation of the synchronous display of the real-time fluoroscopic image and the extracted one image of one heartbeat. FIG. 15A shows a case where time synchronization is performed by displaying on separate monitors as in the third embodiment. In this case, the display control unit 14 has a control function for synchronous display on the two monitors. FIG. 15B shows a case where a plurality of windows are displayed on one monitor, and a real-time fluoroscopic image and one extracted one heartbeat image are displayed in time synchronization. In FIG. 15C, as shown in FIG. 15B, a plurality of windows are displayed on one monitor to synchronize the time of the real-time fluoroscopic image and one extracted single heartbeat image, and further reduce X-ray exposure. Therefore, an X-ray shielding device is automatically inserted into the display area of the extracted image of one heartbeat. In addition, a partial area of the extracted image of one heartbeat can be displayed in an enlarged manner, or a partial area can be displayed as a frame on a real-time fluoroscopic image.

  An example of an interface for designating a phase in the operation unit 8 is shown in FIG. In FIG. 16A, the operator designates the phase by moving the bar left and right. In FIG. 16B, the operator inputs numerical values using a keyboard or the like. FIG. 16C uses the cardiac phase of the image used when the operator selects a partial region. In addition to the method of specifying the phase by the ratio “%” in the RR interval of the electrocardiogram as described above, the method of specifying by the absolute time “second” from the R wave can be used.

  FIG. 17 shows a variation of the specific processing performed by the image processing unit 13. If necessary, the image processing unit 13 can perform processing as shown in FIG. 17 on one image of one heartbeat extracted by the display image extraction unit 12.

  FIG. 17A is for performing motion correction on the extracted image of one heartbeat. FIG. 17B is an example in which the beat-to-beat addition process is performed on one extracted one heartbeat image. Alternatively, the averaging may be performed only when the similarity is detected and the similarity is higher than the reference. FIG. 17C calculates the similarity between the frame near the specified phase and the previous display image, and displays the image with the highest similarity. FIG. 17D shows heartbeat recursive addition, in which a weighted addition average is performed on the extracted image of one heartbeat. FIG. 17E is obtained by adding an average between beats with similarity search function to the motion correction shown in FIG. 17A. FIG. 17F is obtained by adding the neighborhood image addition average with similarity function to the motion correction shown in FIG. 17A.

  Further, the above-described first to third embodiments can be arbitrarily combined. For example, as shown in FIG. 18, the designation of a partial area to be displayed is accepted together with the selection of the reference image from the operator. In addition, a partial region of the image having the same phase as the selected reference image is extracted for each cycle from the fluoroscopic images collected in real time. Then, the partial area of the reference image and the partial area of the image having the same phase as the extracted reference image are overlapped and subjected to a specific process as necessary, and the time is displayed together with the fluoroscopic image collected in real time. Display synchronously.

FIG. 19 shows a processing procedure in this case. The apparatus configuration is the same as that shown in FIG. 1, and will be described with reference to FIG.
When a fluoroscopic X-ray generation operation is performed by the operator in the operation unit 8, the system control unit 9 instructs the display control unit 14 to display a fluoroscopic image in real time. In response to this instruction, the display control unit 14 displays a real-time fluoroscopic image on the monitor 15 using the fluoroscopic image data collected via the X-ray detector 2.

  Further, the system control unit 9 accepts selection of a reference image from an angiographic image and designation of a partial region to be displayed in the operation unit 8 and extracts a partial region from the selected reference image (step) S1901). Further, the display image extraction unit 12 extracts a partial region of the image having the same phase as the selected reference image for each cycle from the fluoroscopic images collected in real time based on the electrocardiogram signal (step S1902). . The image processing unit 13 superimposes the partial region extracted from the reference image and the partial region of the image in phase with the extracted reference image, and performs a specific process (step S1903). The display control unit 14 displays the processed image in synchronism with the fluoroscopic image collected in real time by switching the image once per cycle according to the time interval at the time of collection and displaying it on the monitor 16.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Specific examples of modifications are as follows.

  (1) Each function according to the present embodiment can also be realized by installing a program for executing the processing in a computer such as a workstation and developing the program on a memory. At this time, a program capable of causing the computer to execute the technique is stored in a recording medium such as a magnetic disk (floppy (registered trademark) disk, hard disk, etc.), an optical disk (CD-ROM, DVD, etc.), or a semiconductor memory. It can also be distributed.

  (2) In each of the above-described embodiments, the X-ray image of the heart is used for the description. However, the present invention is not limited to the X-ray image but can be applied to other medical images such as an MRI image and an ultrasonic image. In addition, the electrocardiogram signal is not always essential, and the phase of another periodic biological motion (for example, respiratory motion) can be used instead of the cardiac phase.

  (3) In the above embodiment, the image processing apparatus has been described as a configuration integrated with the X-ray diagnostic apparatus. However, the image processing apparatus includes an image data storage unit 11, a display image extraction unit 12, an image processing unit 13, and a display control unit 14. In addition, the image processing apparatus can be configured separately and independently.

  In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... X-ray tube, 2 ... X-ray detector, 3 ... Bed, 4 ... X-ray control part, 5 ... C arm apparatus, 6 ... C arm moving mechanism, 7 ... Bed moving mechanism, 8 ... Operation part, 9 ... System control unit, 10 ... electrocardiograph, 11 ... image data storage unit, 12 ... display image extraction unit, 13 ... image processing unit, 14 ... display control unit, 15, 16 ... monitor.

Claims (5)

Display of an X-ray image collected in real time based on X-rays irradiated from the X-ray tube and transmitted through the subject, and display of an image extracted from the X-ray image and automatically extracted and partially extracted from the X-ray image And a display unit for performing in parallel,
The display unit displays the clipped image so that the stent in the blood vessel of the subject whose position is moved by a heartbeat appears substantially stopped by switching and displaying the cut image according to a time interval at the time of acquisition. An image processing apparatus.   The image processing apparatus according to claim 1, further comprising an addition processing unit that performs an addition process on the clipped image obtained along a time series.   The display unit displays a plurality of windows on a single monitor so that the X-ray image collected in real time and an image extracted from the X-ray image and partially extracted and automatically detected are enlarged. The image processing apparatus according to claim 1, wherein: An image processing apparatus according to at least one of claims 1 to 3,
An X-ray tube that generates X-rays;
An X-ray diagnostic apparatus comprising: an X-ray detector that detects X-rays emitted from the X-ray tube.   The program which makes a computer perform the process of each part of the image processing apparatus of any one of Claims 1 thru | or 3.