JP2010148778A - Image display and image display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display and image display method for simultaneously displaying an angiographic animation and an IVUS (Intra Vascular Ultra Sound) animation in a temporally and spatially synchronized state. <P>SOLUTION: A first image frame with the appearance of a blood vessel branch position is predetermined on an intravascular ultrasonic animation, based on a frame selection using an input means. When the same blood vessel branch position appearing in the second image frame of the angiographic animation, which is photographed at the same time of the first image frame, is selected by using the input means, an IVUS photographing position on each image frame of the angiographic animation is predetermined based on the blood vessel branch position, a difference in photographing time between the second image frame and another image frame, and the movement speed of the IVUS photographing. The angiographic animation and the intravascular ultrasonic animation are reproduced by matching the display timings of the first and second image frames, and also a mark for indicating the IVUS photographing position predetermined by each image frame is displayed on the angiographic animation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a technique for simultaneously displaying an angio moving image and an IVUS (IntraVascular UltraSound) moving image.

  In the examination of circulatory system diseases, there are many scenes in which an angio examination by an X-ray diagnostic apparatus and an IVUS examination by an intravascular ultrasonic examination apparatus (IVUS apparatus) are used in combination. A blood vessel contrasted with a contrast agent is imaged as a blood vessel fluoroscopic image with X-rays, and at the same time, a catheter capable of radial scanning with ultrasound is inserted into the blood vessel to perform IVUS imaging of the blood vessel cross-sectional image. Comparison observation of two kinds of images having different properties, that is, a fluoroscopic image of a blood vessel and a cross-sectional image of the blood vessel in the radial direction, is possible, and a stenosis site or the like can be diagnosed from more information (for example, see “Patent Document 1”) ).

  However, in the examination using both the X-ray diagnostic apparatus and the IVUS apparatus, the images are individually collected without cooperation of both apparatuses. Therefore, temporal and spatial synchronization between the angio moving image and the IVUS moving image is performed. It is not removed. That is, the first image frame of the angio moving image and the first image frame of the IVUS moving image have different shooting times, and the IVUS shooting position cannot be captured from the angio moving image.

  Therefore, conventionally, comparative observation has been performed by manually arranging image frames taken at the same time, using the shooting time and state of the images of the angio moving image and the IVUS moving image as clues. Also, the shooting time and the state of the image of the angio moving image and the IVUS moving image are used as clues, and the position on the angio moving image corresponding to the shooting position appearing on the IVUS moving image is estimated.

  Therefore, when the angio inspection and the IVUS inspection are used in combination, it is necessary to spend considerable labor and time before the comparative observation of both images is started, and improvement in work efficiency has been desired.

JP 2007-330669 A

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an image display device and an image display method for simultaneously displaying an angio moving image and an IVUS moving image in temporal and spatial synchronization. It is to provide.

  The invention according to claim 1 for solving the above-described problem has a user interface including a display means and an input means, and is provided in a plurality of frames of blood vessels obtained by IVUS imaging while moving the imaging position in the blood vessel cavity. An image display device for simultaneously reproducing an ultrasonic moving image and a plurality of frames of angio moving images obtained by contrast imaging of the blood vessel, wherein the image is displayed on the intravascular ultrasonic moving image based on frame selection using the user interface. First data processing means for specifying a first image frame in which a blood vessel branching position appears, and the same blood vessel appearing in a second image frame of an angio moving image having the same shooting time as the first image frame When a branch position is selected using the user interface, the blood vessel branch position, when the second image frame and other image frames are captured A second data processing means for specifying an IVUS imaging position on each image frame of the angio moving image based on the difference and a moving speed of the imaging position in the blood vessel cavity; the first image frame; The angio moving image and the intravascular ultrasound moving image are displayed at the same display timing of the two image frames, and a mark indicating the IVUS imaging position specified in each image frame is displayed on the angio moving image. And a display control means.

  When the one blood vessel branch position is selected from the second image frame, the second data processing means calculates a moving distance from the blood vessel branch position based on the imaging time difference and the moving speed. A position that is separated from the position of the blood vessel branch by the moving distance may be associated with each image frame as an IVUS imaging position (corresponding to the invention according to claim 2).

  The second data processing means, when the two blood vessel branch positions passing through the IVUS imaging from the second image frame are selected, between the two points measured on the second image frame The IVUS photographing position may be specified by correcting the moving distance by a ratio of the distance between the corresponding distance measured on another image frame and the corresponding distance measured on another image frame (corresponding to the invention according to claim 3).

  When a desired point on the angio moving image is selected using the user interface, the display control unit is configured to display the image frame of the angio moving image associated with the IVUS shooting position closest to the selected point and the image frame The cue may be reproduced from the image frame of the intravascular ultrasound moving image having the same imaging time as the image frame (corresponding to the invention described in claim 4).

  When a desired point on the angio moving image is selected using the user interface, the display control unit is configured to select one of the blood vessel branch positions on the image frame displayed when the point is selected. Is corrected by the ratio, the shooting time difference is calculated from the corrected distance and the moving speed, and the image frame of the angio moving image corresponding to the shooting time difference and the image frame and the shooting time are the same. The cue may be reproduced from the image frame of the intravascular ultrasonic moving image (corresponding to the invention described in claim 5).

  The invention according to claim 6 for solving the above-mentioned problems is that a plurality of frames of intravascular ultrasound moving images obtained by performing IVUS imaging while moving in a blood vessel cavity, and a plurality of frames of angiography obtained by contrast imaging of the blood vessels. An image display method for simultaneously reproducing a moving image, wherein a blood vessel branch position appears on the intravascular ultrasonic moving image based on frame selection using a user interface including a display stage and an input unit. The first step of specifying the image frame and the same blood vessel branch position appearing in the second image frame of the angio moving image having the same shooting time as the first image frame are selected using the input means. And the angio moving image based on the blood vessel branch position, the imaging time difference between the second image frame and another image frame, and the moving speed of the imaging position in the blood vessel lumen. A second step of specifying an IVUS imaging position on each image frame, the angio moving image and the intravascular ultrasound moving image in accordance with the display timings of the first image frame and the second image frame; And a third step of displaying a mark indicating the IVUS photographing position specified in each image frame on the angio moving image.

  In the second step, when one blood vessel branch position is selected from the second image frame, the moving distance from the blood vessel branch position is calculated based on the imaging time difference and the moving speed, A position that is separated from the position of the blood vessel branch by the moving distance may be associated with each image frame as an IVUS imaging position (corresponding to the invention of claim 7).

  In the second step, when the two blood vessel branch positions passing through the IVUS imaging from the second image frame are selected, the distance between the two points measured on the second image frame The IVUS photographing position may be specified by correcting the moving distance by a ratio between the corresponding distance measured on the other image frame and the corresponding distance measured on another image frame (corresponding to the invention according to claim 8).

  In the third step, when a desired point on the angio moving image is selected using the user interface, an image frame of the angio moving image associated with an IVUS shooting position closest to the selected point and The cueing and reproduction may be performed from the image frame of the intravascular ultrasonic moving image having the same imaging time as the image frame (corresponding to the invention of claim 9).

  In the third step, when a desired point on the angio moving image is selected using the user interface, one of the blood vessel branch positions on the image frame displayed when the point is selected. Is corrected by the ratio, the shooting time difference is calculated from the corrected distance and the moving speed, and the image frame of the angio moving image corresponding to the shooting time difference and the image frame and the shooting time are calculated. The cue may be reproduced from the image frame of the same intravascular ultrasonic moving image (corresponding to the invention of claim 10).

  According to the present invention, temporal and spatial synchronization is established between the angio moving image and the IVUS moving image, and the shooting position appearing in the IVUS shooting moving image corresponds to any position on the angio moving image that is simultaneously reproduced. It is possible to easily grasp whether or not the stenosis site is observed.

  Hereinafter, a preferred embodiment of an image display device according to the present invention will be specifically described with reference to the drawings.

  FIG. 1 is a diagram illustrating a network including an image display device 1 according to the present embodiment. FIG. 2 is a schematic diagram showing an imaging mode by the X-ray diagnostic apparatus 100 and the intraluminal ultrasonic diagnostic apparatus 200.

  As shown in FIG. 1, the image display apparatus 1 is connected to a network having an X-ray diagnostic apparatus 100, an intraluminal ultrasonic diagnostic apparatus (hereinafter referred to as an IVUS apparatus) 200, a time server 300, and an image storage apparatus 400. ing.

  The X-ray diagnostic apparatus 100 captures an angio moving image Pa. The angio moving image Pa is moving image data including a plurality of vascular fluoroscopic images obtained by continuously photographing a blood vessel contrasted with a contrast agent with X-rays. The IVUS apparatus 200 captures an intravascular ultrasound moving image (hereinafter referred to as an IVUS moving image) Pi using an IVUS (Intravascular Ultrasound) method. The IVUS moving image Pi is moving image data including a plurality of frames of blood vessel cross-sectional images obtained by radial scanning in which ultrasonic waves are transmitted and received in a blood vessel.

  The time server 300 provides time information to the X-ray diagnostic apparatus 100 and the intraluminal ultrasonic diagnostic apparatus 200. Time synchronization between the X-ray diagnostic apparatus 100 and the IVUS apparatus 200 is synchronized with the time server 300 as a reference. The image storage device 400 is a so-called storage including a database 410, and stores an angio moving image and an IVUS moving image captured by the X-ray diagnostic apparatus 100 and the IVUS apparatus 200.

  Here, shooting of the angio moving image Pa and the IVUS moving image Pi will be described. As shown in FIG. 2, the X-ray diagnostic apparatus 100 images a blood vessel transmission image of the blood vessel 500 including the stenosis site 510, and the intraluminal ultrasound diagnosis apparatus 200 performs IVUS in the blood vessel 500 including the stenosis site 510. Take a picture.

  The X-ray diagnostic apparatus 100 continuously irradiates X-rays from the X-ray tube 110, detects X-rays transmitted through a blood vessel contrasted with a contrast agent, and obtains an angio moving image Pa from the signal.

  The intraluminal ultrasonic diagnostic apparatus 200 includes a catheter 210 provided with an ultrasonic transducer 220 at a distal end capable of radial scanning by mechanical or electrical rotation. The catheter 210 is once inserted into the blood vessel 500 where the stenosis site 510 exists, and an IVUS moving image Pi is taken while being pulled out. The catheter 210 is inserted until it passes through a branch point 530 that branches into a blood vessel in which the stenosis site 510 exists, and passes through a branch point 520 where the blood vessel 500 further branches. The drawing speed v of the catheter 210 is set to a constant speed as much as possible, for example, v = 0.5 mm / S.

  The reason why the IVUS imaging is performed on the blood vessel path including the branch point 520 and the branch point 530 is to use the IVUS imaging position and the time as a reference point in the IVUS moving image. The reason why the drawing speed v is set to a substantially constant speed is to specify the IVUS photographing position based on the elapsed time from the time when the reference point such as the branch point 520 is photographed.

  The image display apparatus 1 simultaneously reproduces the moving images Pa and IVUS moving images Pi in temporal and spatial synchronization. FIG. 3 is a block diagram illustrating a configuration of the image display device 1.

  As shown in FIG. 3, the image display device 1 includes a storage unit 11, a display control unit 12, a user interface including a display unit 13 and an input unit 14, and a synchronization processing unit 15.

  The storage unit 11 is a so-called memory. The storage unit 11 receives and accumulates the angio moving image Pa and the IVUS moving image Pi stored in the image storage device 400.

  When the angio moving image Pa and the IVUS moving image Pi are input, the synchronization processing unit 15 includes a first data processing unit that performs spatial synchronization processing on the moving image data based on an instruction signal from the input unit 14; Second data processing means. The input unit 14 is a keyboard, a mouse, or the like, and is used when spatial synchronization of the angio moving image Pa and the IVUS moving image Pi is established. The input unit 14 is used when instructing to cue a moving image.

  FIG. 4 is a schematic diagram showing the concept of temporal and spatial synchronization processing of the image display device 1. FIG. 5 is a schematic diagram showing the concept of specifying the IVUS photographing position on the angio moving image Pa.

  As shown in FIG. 4, time information t <b> 1 when angio shooting is started is added to the angio moving image Pa based on synchronization with the time server 300. In addition, time information T1 at which IVUS imaging is started is added to the IVUS moving image Pi based on synchronization with the time server 300. The t1 which is the photographing time of the first image frame Fa1 of the angio moving image Pa and the T1 which is the photographing time of the first image frame Fi1 of the IVUS moving image Pi are inserted into the blood vessel and the pull-out photographing is started. Is shifted by the required time α until the video is played back from the beginning at the same time.

  The synchronization processing unit 15 uses the input unit 14 to indicate the position where IVUS imaging was performed at the same time from one image frame Fad (n = d: n is a frame number) of the angio moving image Pa. The IVUS shooting position in the image frame Fan is specified from the time lapse and the drawing speed v. A branch point 520 is desirable for the IVUS imaging position to be instructed. If it is an image frame Fad at the same time as the image frame Fid (n = d: n is a frame number) where the branch point 520 appears in the IVUS moving image Pi, it is easy to indicate the position where the IVUS image was taken at that time. is there.

  Specifically, when the blood vessel 500 has little or no expansion / contraction, the synchronization processing unit 15 causes the operator to designate the image frame Fid in which the branch point 520 appears in the IVUS moving image Pi using the input unit 14, and The shooting time Td of the image frame Fid is acquired. If the frame number n = d of the designated image frame Fid, the shooting time Td is obtained by adding a value obtained by multiplying the frame rate β by d to the first shooting time T1. Frame number n is assigned in ascending order of shooting time from the first image frame. Then, the synchronization processing unit 15 specifies the image frame Fad of the angio moving image Pa captured at the capturing time td that is the same value as the capturing time Td.

  The synchronization processing unit 15 causes the operator to specify the position on the image of the branch point 520 appearing in the image frame Fad of the angio moving image Pa using the input unit 14. As a result, in the angio moving image Pa, the image frame Fad contrast-enhanced when the bifurcation point 520 is imaged is identified, and the IVUS imaging position when the image frame Fad is imaged is identified on the image frame Fad. Is done.

  For the IVUS imaging position on another image frame Fan (n is the frame number) of the angio moving image Pa, the synchronization processing unit 15 uses the imaging time difference tsn from the image frame Fad and the extraction speed v to determine the vascular system. It is specified by tracing on the road. Specifically, as shown in FIG. 5, the drawing speed v of the catheter 210 is determined from the imaging time difference tsn obtained from the difference between the imaging time td when the branch point 520 is imaged and the imaging time tn of another image frame Fan. A position retroactive from the branch point 520 on the vascular system path by the distance Dn obtained by multiplication is the IVUS imaging position when the image frame Fan is captured.

  The synchronization processing unit 15 associates IVUS position information Ln (n is a frame number) indicating the IVUS shooting position on each image frame Fan of the angio moving image Pa with each image frame Fan.

  The display control unit 12 creates a moving image reproduction screen in which the angio moving image Pa and the IVUS moving image Pi are arranged, and displays the moving image reproduction screen on the display unit 13. The display unit 13 is a so-called monitor. The display control unit 12 adjusts the display timing so that the angio moving image Pa and the IVUS moving image Pi are imaged at the same time on the basis of the incidental information of the shooting time adjusted by the time server 300. Are displayed on the display unit 13. Further, the display control unit 12 displays an IVUS shooting position mark indicating the IVUS shooting position in an overlay display at a position on the image frame Fan indicated by the IVUS position information Ln.

  Further, the display control unit 12 cues and reproduces the IVUS moving image Pi from the image frame Fin obtained by IVUS imaging of one point on the designated vascular system path. One point on the vascular system path is instructed from the angio moving image Pa using the input unit 14. When the cursor is placed on a point on the blood vessel path appearing in the angio moving image Pa and selected by clicking or the like, the display control unit 12 displays the image frame Fan with the IVUS position information Ln closest to the selected point. And an angio moving image Pa is cued and reproduced from the image frame Fan. At the same time, the display control unit 12 cues and reproduces the IVUS moving image Pi from the image frame Fin taken at the same time as the image frame Fan that has started cueing reproduction.

  FIG. 6 is a flowchart showing the operation of the synchronization process by such an image display apparatus 1.

  First, as illustrated in FIG. 7, the synchronization processing unit 15 causes the display unit 13 to display a list of the image frames Fin of the IVUS moving image Pi (S01). When the image frame Fid in which the branch point 520 appears is selected from each displayed image frame Fin using the input unit 14 (S02), the synchronization processing unit 15 calculates the shooting time Td of the image frame Fid. (S03), a flag Fs is added to the image frame Fad of the angio moving image Pa photographed at the same time td as the calculated photographing time Td (S04).

  Next, as shown in FIG. 8, the synchronization processing unit 15 displays the image frame Fad on the display unit 13 (S05). When the position corresponding to the branch point 520 on the displayed image frame Fad is designated using the input unit 14 (S06), the IVUS position information Ld is added to the image frame Fad (S07).

  Further, the synchronization processing unit 15 extracts the blood vessel 500 from each image frame Fan (S08). Then, the synchronization processing unit 15 calculates an imaging time difference tsn between each image frame Fan and the image frame Fad (S09), and the catheter 210 is extracted with the imaging time difference tsn from the imaging time difference tsn and the extraction speed v of the catheter 210. The distance Dn is calculated (S10), and IVUS position information Ln indicating the position traced on the vascular system path from the position designated as the branch point 520 by the distance Dn is added to each image frame Fan (S11).

  FIG. 9 is a flowchart showing an operation of simultaneously displaying the angio moving image Pa and the IVUS moving image Pi that have been subjected to the spatial synchronization processing.

  The display control unit 12 arranges the angio moving image Pa and the IVUS moving image Pi, and reproduces and displays them simultaneously from the image frame Fid and the image frame Fad with the flag Fs attached (S21). At the same time, the display control unit 12 displays an IVUS shooting position mark in an overlay position at a position on the image of the angio moving image Pa indicated by the IVUS position information Ln attached to the image frame Fan to be displayed (S22).

  As shown in FIG. 10a, when a point on the angio moving image Pa is selected using the input unit 14 (S23), the display control unit 12 displays the IVUS position information Ln closest to the position on the selected image. The attached image frame Fan is searched from the storage unit 11 (S24). When the corresponding image frame Fan is found, the display control unit 12 specifies the image frame Fin having the same shooting time as the shooting time of the image frame Fan from the IVUS moving image Pi (S25).

  Then, as shown in FIG. 10b, the display control unit 12 cues and reproduces the angio moving image Pa and the IVUS moving image Pi from the searched image frame Fan and the specified image frame Fin (S26).

  In the above description, the IVUS imaging position information Ln in each image frame Fan is calculated based on the distance on the vascular system road from the branch point 520 as the reference point. However, for example, when the blood vessel 500 expands and contracts according to the pulsation, such as when the heart is imaged, it is preferable to set two reference points and calculate the IVUS imaging position information Ln based on the ratio. . Hereinafter, modified examples relating to the calculation of the IVUS imaging position information Ln by the synchronization processing unit 15 will be described.

  FIG. 11 is a schematic diagram showing the concept of specifying the IVUS imaging position on the angio moving image Pa when the blood vessel expands and contracts.

  As shown in FIG. 11, the synchronization processing unit 15 uses the distance Da on the vascular system path between the branch point 520 and the branch point 530 in the image frame Fad of the angio moving image Pa, and the vascular system path appearing in the image frame Fad as a reference. The branch point 520 in the image frame Fan using the distance Db on the vascular system path between the IVUS imaging position and the branch point 520 at each imaging time and the distance Dc on the vascular system path between the branch point 520 and the branch point 530 in the image frame Fan. And a distance Dd between the IVUS imaging position and the IVUS imaging position. That is, the synchronization processing unit 15 calculates the distance Dd by correcting the distance Db by the ratio of the distance Dc and the distance Da.

  For the above processing, the synchronization processing unit 15 designates the branch point 520 and the branch point 530 in the image frame Fad, and calculates and holds the distance Da. The synchronization processing unit 15 uses a known moving object detection method, for example, a method for estimating a position vector from the peak position of a two-dimensional cross-correlation coefficient, an optical flow method using an image density gradient, or the like. Then, the branch point 520 and the branch point 530 in each image frame Fan are tracked, and the distance Dc is calculated. Then, the distance Dd is calculated by multiplying the value obtained by dividing the distance Dc by the distance Da by the distance Db. The distance Dd is traced from the branch point 520 on the image frame Fan toward the branch point 530 by the distance Dd. The IVUS shooting position information Ln of the image frame Fan is used.

  FIG. 12 is a schematic diagram showing the concept of cueing reproduction processing when a blood vessel expands and contracts.

  In the cue reproduction process of the display control unit 12, the elapsed time is calculated from the distance between the corresponding point on the image frame Fad corresponding to the point x selected using the input unit 14 and the branch point 520, and the extraction speed v. Calculation is performed, and reproduction is performed from the image frame Fan of the angio moving image Pa and the image frame Fin of the IVUS moving image Pi taken after the elapsed time.

  Specifically, the display control unit 12 corrects the distance De on the vascular system path between the selected point and the branch point 520 on the image frame Fan displayed at that time by the ratio of the distance Da to the distance Dc. As a result, the corresponding points when the vascular system path appearing in the image frame Fid is used as a reference are obtained. Then, the imaging time difference tsn is calculated from the distance Df between the corresponding point in the image frame Fid and the branch point 520 on the vascular system path and the extraction speed v, and when the imaging time difference tsn has elapsed from the image frame Fid of the IVUS moving image Pi. Cue playback is performed from the captured image frame Fin.

  FIG. 13 is a flowchart showing a modification of the IVUS shooting position specifying operation on the angio moving image Pa of the image display apparatus 1.

  First, the synchronization processing unit 15 displays the image frame Fad on the display unit 13 (S31). When the input unit 14 is used to specify the branch point 520 and the position corresponding to the branch point 530 on the displayed image frame Fad (S32), the IVUS position information Ld is added to the image frame Fad (S33). ).

  In addition, the synchronization processing unit 15 extracts a blood vessel route between the branch point 520 and the branch point 530 (S34), and calculates a distance Da on the blood vessel system path between the branch point 520 and the branch point 530 in the image frame Fad ( S35).

  Further, the synchronization processing unit 15 calculates a distance Db on the vascular system path between the IVUS imaging position at each imaging time tn and the branch point 520 with reference to the vascular system path appearing in the image frame Fad (S36).

  Next, the synchronization processing unit 15 extracts the blood vessel image, the branch point 520, and the branch point 530 from each image frame Fan (S37), and on the vascular system path between the branch point 520 and the branch point 530 in each image frame Fan. The distance Dc is calculated (S38).

  Then, the synchronization processing unit 15 calculates the distance Dd by multiplying the value obtained by dividing the distance Dc by the distance Da by the distance Db (S39), and the position on the image extracted by the distance Dd from the branch point 520 in the image frame Fan. The IVUS shooting position information Ln is associated with the image frame Fan (S40).

  FIG. 14 is a flowchart showing a modified example of the cue reproduction operation of such an image display apparatus 1.

  When one point x on the angio moving image Pa is selected using the input unit 14 (S51), the display control unit 12 displays the one point x and the branch point 520 in the image frame Fan displayed at the time of selection. The distance De is calculated (S52).

  When the distance De is calculated, the display control unit 12 calculates the distance Da on the vascular system path between the branch point 520 and the branch point 530 in the image frame Fad, and the distance on the vascular system path between the branch point 520 and the branch point 530 in the image frame Fan. A distance Df between the corresponding point in the image frame Fad and the branch point 520 is calculated by dividing by Dc and multiplying by the distance De (S53).

  When the distance Df is calculated, the display control unit 12 calculates the shooting time difference tsn by dividing the distance Df by the drawing speed v (S54).

  Then, the image frame Fan of the angio moving image Pa and the image frame Fin of the IVUS moving image Pi taken after the shooting time difference tsn from the image frame Fad are read from the storage unit 11 (S55), and reproduction is started from the read image frame (S55). S56).

  According to the image display device 1 and the display method thereof, since the temporal and spatial synchronization is established between the angio moving image Pa and the IVUS moving image Pi, the shooting position appearing in the IVUS moving image Pi is simultaneously reproduced. It is possible to easily grasp which position on the moving angio moving image Pa corresponds to the observation of the stenosis site.

It is a figure which shows the network containing the image display apparatus which concerns on this embodiment. It is a schematic diagram which shows the imaging | photography aspect by an X-ray diagnostic apparatus and an intraluminal ultrasonic diagnostic apparatus. It is a block diagram which shows the structure of an image display apparatus. It is a schematic diagram which shows the concept of the temporal and spatial synchronization process of an image display apparatus. It is a schematic diagram which shows the concept which specifies an IVUS imaging | photography position on the angio moving image Pa. It is a flowchart which shows the operation | movement of the synchronous process by an image display apparatus. It is a screen figure for selecting an image frame in which a branch point appears. It is a screen figure for instruct | indicating the position of a branch point. It is a flowchart which shows the operation | movement which displays an angio moving image and an IVUS moving image simultaneously. It is a screen figure which shows cue reproduction | regeneration. It is a schematic diagram which shows the concept which specifies an IVUS imaging | photography position on an angio moving image when a blood vessel expands and contracts. It is a schematic diagram which shows the concept of cueing reproduction | regeneration processing in case an image vessel expands and contracts. It is a flowchart which shows the modification of the specific operation | movement of the IVUS imaging | photography position on the angio moving image of an image display apparatus. It is a flowchart which shows the modification of cueing reproduction | regeneration operation | movement of an image display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image display apparatus 11 Storage part 12 Display control part 13 Display part 14 Input part 15 Synchronization processing part 100 X-ray diagnostic apparatus 110 X-ray tube 200 IVUS apparatus 210 Catheter 220 Ultrasonic transducer 300 Time server 400 Image storage apparatus 410 Database 500 Blood vessel 510 Stenosis site 520 Branch point 530 Branch point Pa Angio video image Fan image frame Fad image frame Pi IVUS video Fin image frame Fid image frame v Extraction speed

Claims (10)

A user interface including a display unit and an input unit, and a plurality of frames of intravascular ultrasound moving images obtained by performing IVUS imaging while moving the imaging position in the blood vessel cavity, and a plurality of frames obtained by contrast imaging of the blood vessels An image display device that simultaneously reproduces an angio moving image,
First data processing means for identifying a first image frame in which a blood vessel branch position appears on the intravascular ultrasound moving image based on frame selection using the user interface;
When the same blood vessel branch position appearing in the second image frame of the angio moving image having the same shooting time as that of the first image frame is selected using the user interface, the blood vessel branch position, Second data processing means for specifying an IVUS imaging position on each image frame of the angio moving image based on an imaging time difference between the image frame and another image frame and a moving speed of the imaging position in the blood vessel cavity; ,
The angio moving image and the intravascular ultrasound moving image are displayed in accordance with the display timing of the first image frame and the second image frame, and the IVUS imaging position specified in each image frame is indicated. Display control means for displaying a mark on the angio moving image;
Providing
An image display device characterized by the above. The second data processing means includes
When one blood vessel branch position is selected from the second image frame, a movement distance from the blood vessel branch position is calculated based on the imaging time difference and the moving speed, and the movement from the blood vessel branch position is calculated. Associating a position at a distance as an IVUS shooting position for each image frame;
The image display device according to claim 1. The second data processing means includes
When the two blood vessel branch positions passing through the IVUS imaging from the second image frame are selected, the distance between the two points measured on the second image frame and the other image frames Specifying the IVUS imaging position by correcting the movement distance in a ratio to the measured distance between the two points;
The image display device according to claim 2. The display control means includes
When a desired point on the angio moving image is selected using the user interface, the image frame of the angio moving image associated with the IVUS shooting position closest to the selected point, the image frame, and the shooting time are displayed. Cueing and playing from the same intravascular ultrasound video frame,
The image display device according to claim 2. The display control means includes
When a desired point on the angio moving image is selected using the input means, the distance between the one point and the one of the blood vessel branch positions on the image frame displayed when the point is selected is calculated as the ratio. The imaging time difference is calculated from the corrected distance and the moving speed, and the intra-vascular ultrasound motion having the same imaging time as the image frame of the angio moving image corresponding to the imaging time difference and the image frame is calculated. Cueing from the image frame of the image,
The image display device according to claim 3. This is an image display method for simultaneously reproducing a plurality of intravascular ultrasound moving images obtained by IVUS imaging while moving the imaging position in the blood vessel cavity and a plurality of frames of angio moving images obtained by contrast imaging of the blood vessels. And
A first step of identifying a first image frame in which a blood vessel branch position appears on the intravascular ultrasonic moving image based on frame selection using a user interface including a display means and an input means;
When the same blood vessel branch position appearing in the second image frame of the angio moving image having the same shooting time as that of the first image frame is selected using the user interface, the blood vessel branch position, A second step of specifying an IVUS imaging position on each image frame of the angio moving image based on an imaging time difference between the image frame and another image frame and a moving speed of the imaging position in the blood vessel cavity;
The angio moving image and the intravascular ultrasound moving image are reproduced in synchronization with the display timing of the first image frame and the second image frame, and the IVUS imaging position specified in each image frame is indicated. A third step of displaying a mark on the angio video,
Having
An image display method characterized by the above. In the second step,
When one blood vessel branch position is selected from the second image frame, a movement distance from the blood vessel branch position is calculated based on the imaging time difference and the moving speed, and the movement from the blood vessel branch position is calculated. Associating a position at a distance as an IVUS shooting position for each image frame;
The image display method according to claim 6. In the second step,
When the two blood vessel branch positions passing through the IVUS imaging from the second image frame are selected, the distance between the two points measured on the second image frame and the other image frames Identifying the IVUS imaging position by correcting the moving distance in proportion to the measured corresponding distance;
The image display method according to claim 7. In the third step,
When a desired point on the angio moving image is selected using the user interface, the image frame of the angio moving image associated with the IVUS shooting position closest to the selected point, the image frame, and the shooting time are displayed. Cueing and playing from the same intravascular ultrasound video frame,
The image display method according to claim 7. In the third step,
When a point on the angio moving image is selected using the user interface, the distance between the point and one of the blood vessel branch positions on the image frame displayed when the point is selected is corrected by the ratio. Then, the imaging time difference is calculated from the corrected distance and the moving speed, and the image frame of the angio moving image corresponding to the imaging time difference and the intravascular ultrasonic moving image having the same imaging time as the image frame are calculated. Playing back from the image frame,
The image display method according to claim 8.