JPH0452141B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to an X-ray diagnostic apparatus, and more particularly to an X-ray diagnostic apparatus that is effective in diagnosing and treating vascular stenosis in a subject.

(Prior Art) Conventionally, as a method for performing recovery surgery for a narrowed blood vessel in a subject, a catheter (thin tube) is inserted toward the narrowed blood vessel in the subject, and a balloon (inflatable body) is attached to the tip of the catheter. ) is aligned with the narrowed part of the blood vessel and then inflates the balloon to widen the narrowed part to its original thickness.

The above-mentioned recovery surgery is usually performed while observing an X-ray fluoroscopic image that includes the subject's blood vessel stenosis displayed on a TV monitor of an X-ray diagnostic apparatus.

By the way, conventionally, in addition to the above-mentioned method of performing recovery surgery while directly observing the X-ray fluoroscopic image on a TV monitor, advances in image processing technology that have accompanied the spread of IC memory in recent years have enabled the recovery of blood vessels around the stenosis. Image data of a well-produced image (contrast contrast) 60 is stored in advance in an IC memory, and this image data is further converted into digital/analog and displayed on a dedicated TV monitor 50 as shown in FIG. A device has been put into practical use that facilitates catheter operation by comparing this displayed image with the direct fluoroscopic image 61 displayed on the fluoroscopic monitor 51.

However, in the case of such a conventional device, the operator compares an image 60 of blood vessels around the stenosis displayed on the dedicated TV monitor 50 with a direct fluoroscopic image 61 displayed on the fluoroscopic monitor 51 to determine the true state of the stenosis. Since the position of the patient must be imagined on the direct fluoroscopic image 61, it is difficult to accurately grasp the positional relationship between the stenosis and the direct fluoroscopic image 61, and it is not always easy to operate the catheter 30 provided with the balloon 31. There is a problem.

In addition, an image 60 of the blood vessels around the stenosis is displayed as a still image on the dedicated TV monitor 50, but in an actual heart, the blood vessels move due to pulsation, so it is not possible to display only a static image.
0 operation is insufficient.

(Problems to be Solved by the Invention) As described above, with conventional devices, it is difficult to clearly grasp the positional relationship between the vascular stenosis and the direct fluoroscopic image, and it is difficult to accurately operate the catheter. The problem is that it can't be done.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an X-ray diagnostic apparatus that can clearly grasp the positional relationship between a vascular stenosis and a direct fluoroscopic image when performing a recovery surgery for a vascular stenosis. .

[Structure of the Invention] (Means for Solving the Problems) The X-ray diagnostic apparatus of the present invention provides contrast image information obtained by injecting a contrast medium into a narrowed area of a blood vessel accompanied by heartbeat in a subject, and an image collecting means for collecting X-ray fluoroscopic image information of the stenosis, a recording means for recording the contrast image information, and a pulsation indicating the pulsation position of the blood vessel stenosis whose position changes with the heart beats. a position information creation means for creating position information based on the contrast image information recorded in the recording means; a superposition means for superimposing the X-ray fluoroscopic information and the pulsation position information; and superposition by the superposition means. and display means for displaying the information.

(effect) The operation of the apparatus having the above configuration will be explained below.

The image collecting means of this apparatus collects contrast image information obtained by injecting a contrast medium into a pulsating vascular stenosis in a subject, and also collects X-ray fluoroscopic image information of the vascular stenosis.

The contrast image information is once recorded in the recording means.

The position information creation means creates pulsation position information indicating the pulsation position of the vascular stenosis of the subject based on the contrast image information recorded in the recording means.

The superposition means superimposes the X-ray fluoroscopic image information collected by the image collection means and the pulsation position information created by the position upper creation means, and sends the superposition information to the display means for display.

(Example) An example device of the present invention will be explained in detail below.

The apparatus shown in FIG. 1 consists of an X-ray fluoroscopic image obtained by emitting X-rays toward a blood vessel B that expands or contracts in synchronization with the heartbeat of a subject, and a contrast medium flowing into the blood vessel. an image collecting means 1 for capturing a contrast image obtained by irradiating X-rays and collecting image information of both images; and a recording means 2 for recording the contrast image information collected by the image collecting means 1. and a position information creation means 3 for creating pulsation position information indicating the locus of the pulsation position of the blood vessel B based on the contrast image information recorded in the recording means 2.
and a superimposing means 4 for superimposing (superimposing) the X-ray fluoroscopic image collected by the image collecting means 1 and the pulsation position information created by the position information creating means 3, and transmitting the superimposed information, A TV monitor 5 that captures and displays information from this superimposing means 4
and a display means 5 including a.

The image collecting means 1 includes a TV camera 6 that captures the X-ray fluoroscopic image and the contrast image, and an analog/digital (A/D) output signal of the TV camera 6.
D) A/D converter 7 for conversion.

The recording means 2 includes a heartbeat diastole memory 8a for recording contrast image information of the blood vessel B corresponding to the diastole of the heartbeat among the contrast image information collected by the image collecting means 1, and a heartbeat diastole memory 8a for recording the contrast image information of the blood vessel B corresponding to the diastole of the heartbeat. It is equipped with a heartbeat systolic memory 8b for recording contrast image information of the blood vessel B, and a recording indicator 9 for instructing the recording timing in both the memories 8a and 8b.

The position information creation means 3 is configured to display information on the display means 5.
Both memories 8 displayed on the TV monitor 5a
Graphic mark position indicator 1 for specifying graphic marks at the positions of blood vessel stenosis parts P ₁ and P ₂ in both the diastolic and systolic contrast images from a and 8b
0 and a balloon length setting device 11 that sets the length L of the balloon 31 provided at the insertion end of the catheter 30 inserted toward the stenosis of the blood vessel of the subject.
and an arithmetic processing unit 12 that calculates the positions of graphic marks designated as the blood vessel stenosis portions P ₁ and P ₂ in both the contrast images and sends out the calculation results;
Based on the information from the arithmetic processing unit 12, both blood vessel stenoses are
It is equipped with a graphics controller 13 that creates and sends graphics line information (beat position information) passing through P ₁ and P ₂ , and a graphics memory 14 that records this graphics line information. Further, the arithmetic processing unit 12 generates a balloon line parallel to the graphic line information centered on the graphic line information and having a width of 1/2 of the balloon length L set by the balloon length setting device 11.
Information indicating the coordinates of BL ₁ and BL ₂ is created and sent to the graphics controller 13.

The graphics controller 13 creates graphics information for the balloon lines BL ₁ and BL 2 based on the information indicating the coordinates, and stores it in the graphics memory 14 .
It is now being sent to

The graphic memory 14 is designed to record graphic information of the balloon lines BL ₁ and BL ₂ .

The display means 5 receives the output information of the superposition means 4 and converts it into digital/analog.
It includes an A converter 15 and the TV monitor 5a.

Next, the operation of the embodiment device having the above configuration is shown in FIG.
This will be explained with reference to b.

First, angiography is performed on a portion of the subject that includes a vascular stenosis, and the contrast image obtained by the TV camera 6 is converted into a digital signal by the A/D converter 7, and the information on this contrast image is recorded by the recording means 2. That is, at the point in time when the subject's heartbeat is in the diastolic phase, the recording indicator 9 instructs the heartbeat expansion memory 8a to record.

Thereby, contrast image information at a position corresponding to the diastole of the heartbeat in the contrast image is recorded in the memory 8a for the diastole of the heartbeat.

Similarly, at the time of the systolic phase of the heartbeat, the recording indicator 9 instructs the memory 8b for the systolic phase of the heartbeat to record. As a result, this heartbeat systolic memory 8b
Contrast image information at a position corresponding to the systolic phase of the heartbeat in the contrast image is recorded.

Next, the graphic mark position indicator 10 sends an instruction signal to the arithmetic processing section 12, and the arithmetic processing section 12 sends a coordinate signal corresponding to the center of the screen of the TV monitor 5a to the graphics controller 13. The graphics controller 13 creates graphic mark information to be drawn at a position corresponding to the center of the screen of the TV monitor 5a, and writes this into an area of the graphics memory 14 corresponding to the center of the screen.

Next, the superimposing means 4 superimposes the contrast image of the diastole recorded in the heartbeat diastole memory 8a and the graphic mark information recorded in the graphic memory 14, and transfers this to the D/A converter. Send to 15th.

The D/A converter 15 converts the superimposition information into analog and sends it to the TV monitor 5a.

As a result, the contrast image of the blood vessel in the diastolic phase and the graphic mark are simultaneously displayed on the TV monitor 5a. Give instructions to match P ₁ .

Subsequently, the systolic contrast image recorded in the heartbeat systolic memory 8b and the graphic memory 1
4 and the graphic mark information recorded on 4, and display both on the TV monitor 5a in the same way as in the above case.
At the same time, the graphic mark position indicator 10 instructs to align the graphic mark with the position _P2 corresponding to the vascular constriction in the systolic phase.

Then, both positions P ₁ and P ₂ are connected by a graphics line GL based on the graphics line information.

Next, a balloon length of length L is set using the balloon length setting device 11. Based on this balloon length information, the arithmetic processing unit 12 calculates the coordinates of balloon lines BL ₁ and BL ₂ that are parallel to the graphics line GL and have an interval of 1/2L on each side of the graphics line GL. The information is created and sent to the graphics controller 13.

The graphics controller 13 creates graphics information for the balloon lines BL ₁ and BL ₂ based on this coordinate information, and sends this to the TV monitor 5a via the graphics memory 14, superimposition means 4, and D/A converter 15. send.

As a result, balloon lines BL ₁ and BL ₂ as shown in FIG. 2a are drawn parallel to the graphic line GL and at positions 1/2L away from the graphic line GL on both sides, respectively.
Image information of these graphic lines GL and balloon lines BL ₁ and BL ₂ are recorded in the graphics memory 14.

Next, after clearing the screen of the TV monitor 5a,
The image information of the X-ray fluoroscopic image obtained by the image collecting means 1 and the information of the graphic line GL recorded in the graphic memory 14 are superimposed by means 4.
The signals are superimposed by the D/A converter 15, and then converted into analog signals and sent to the TV monitor 5a.

As a result, as shown in FIG. 2b, a graphic line is displayed on the screen of the TV monitor 5a showing the locus of movement of the subject's blood vessel stenosis from the diastole to the systole.
Along with the GL being displayed, the catheter 30 and balloon 31 used in the recovery surgery for the vascular stenosis are also displayed, and the alignment position of the balloon 31 and the vascular stenosis becomes clear, making it easier to operate the catheter 30. becomes.

In addition, in this case, the balloon lines BL ₁ ,
By displaying BL ₂ on both sides of the graphic line GL, it becomes easier to align the balloon 31 with respect to the vascular stenosis.

Next, another example of the apparatus according to the present invention will be explained with reference to FIG. In the apparatus shown in the figure, those having the same functions as those in the apparatus shown in FIG. 1 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

The device shown in FIG. 3 differs from the device shown in FIG. 1 by providing a plurality (three or more) heartbeat recording memories 21a, 21b, ..., 21n as the recording means 20, and recording the heartbeat from the diastole to the systole. These heartbeat recording memories 21a, 21 store a large number of contrast images in the process of
b, . . . , 21n, respectively.

In the case of this apparatus, during angiography, each heartbeat recording memory 2 records contrast image information for each process from diastole to systole based on instructions from a recording indicator 9.
1a, 21b, . . . , 21n.

Next, the contrast image of the blood vessel in the diastolic phase is read out from the heartbeat recording memory 21a and displayed on the TV monitor 5a, and by the same operation as in the case of the apparatus shown in FIG. 1, the contrast image shown in FIG. Align the graphic mark _P1 with the vascular stenosis as shown. Such operations are carried out in the heartbeat recording memories 21b,...,2.
This is done for each of the contrast image information recorded in 1n, and graphic marks P ₁ , .

Next, in the same way as described above, each graphic mark P1,...,Pn is placed on the graphic line.
Tie with GL ₁ . Furthermore, this Grafitz Klein GL ₁
Balloon lines BL ₃ and BL ₄ are drawn on both sides of the balloon by the same operation as described above.

Then, each image information of the graphics line GL ₁ and the balloon lines BL ₃ and BL ₄ is recorded in the graphics memory 14.

After this, as in the case of the apparatus shown in _FIG .
Manipulation of the catheter 30 and balloon 31 becomes easier.

In the case of this device, since the graphite line GL ₁ corresponds to the actual movement locus of the vascular stenosis, the balloon 31 and the vascular stenosis can be more accurately aligned by operating the catheter 30. Become.

The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the invention.

[Effects of the Invention] According to the present invention described in detail above, it is possible to clearly grasp the position of the vascular stenosis where the recovery surgery should be performed directly on a fluoroscopic image, thereby improving the accuracy of the recovery surgery. It is possible to provide an X-ray diagnostic device that can contribute to

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the device of the present invention, FIG. 2a is an explanatory diagram showing a contrast image and graphic line displayed on the TV monitor of the same device, and FIG. 2b is a TV monitor of the same device. FIG. 3 is an explanatory diagram showing an X-ray fluoroscopic image and a graphic line displayed in FIG.
FIG. 4 is an explanatory diagram showing a contrast image and a graphic line displayed on the TV monitor of the apparatus shown in FIG. 3, and FIG. be. 1... Image collecting means, 2... Recording means, 3...
Position information creation means, 4... Superposition means, 5...
Display means.

Claims (1)

[Scope of Claims] 1. An image collecting means for collecting contrast image information obtained by injecting a contrast agent into a vascular stenosis part accompanied by heartbeat in a subject and X-ray fluoroscopic image information of the vascular stenosis part; A recording means for recording contrast image information, and creating pulsation position information indicating a pulsation position of the blood vessel constriction part whose position changes with the heart beat based on the contrast image information recorded in the recording means. X, characterized in that it has a position information creation means for superimposing the X-ray fluoroscopic image information and the pulsation position information, a superposition means for superimposing the X-ray fluoroscopic image information and the pulsation position information, and a display means for displaying the information superimposed by the superposition means. Line diagnostic equipment. 2. The contrast image information recorded in the recording means corresponds to the pulsation position of the vascular stenosis in the diastolic phase and the systolic phase of the heartbeat.
The X-ray diagnostic device described in Section 1. 3. The X-ray image according to claim 1, wherein the contrast image information recorded in the recording means is an arbitrary number of image information each corresponding to a change in the position of a blood vessel stenosis accompanying the heartbeat of the subject. Diagnostic equipment.