JP2013078635A - X-ray image diagnostic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray image diagnostic apparatus capable of reducing skin hazards of a subject.SOLUTION: The X-ray image diagnostic apparatus includes: an operation means permitting input operation of examination information for examining the subject; an X-ray irradiation means for irradiating the subject with X rays based on the examination information input from the operation means; an X-ray detection means for detecting X rays applied by the X-ray irradiation means and transmitting the subject; an image generating means for generating an X-ray image based on the X rays detected by the X-ray detection means; an exposure information creating means for creating exposure information of the subject corresponding to the X-ray image based on the examination information; and a display means for displaying the exposure information together with the X-ray image according to at least one of the operation of stopping radioscopy, operation of radiography, and operation of termination of the examination.

Description

The present invention relates to an X-ray image diagnostic apparatus, and more particularly to an X-ray image diagnostic apparatus that outputs exposure information of a subject to be irradiated with X-rays.

In recent years, an X-ray diagnostic imaging apparatus has been used in angiographic examinations using catheters and IVR (Inter).
With the development of (ventional radiology), progress has been made mainly in the cardiovascular field. This X-ray diagnostic imaging apparatus is intended for the entire arteries and veins including the cardiovascular system, performs X-ray fluoroscopy and imaging in a state where a contrast medium is injected into the blood vessel, and displays the blood vessel displayed on the display unit. Diagnosis and treatment are performed by interpreting image data.

However, for example, in the examination by IVR, X-ray fluoroscopy is performed for a long time on the subject, and therefore skin damage such as burns occurs due to excessive radiation exposure. In order to solve this problem, the skin dose of the subject is obtained, and when the obtained skin dose reaches a preset value, an X-ray tube that emits X-rays and X-rays from the X-ray tube are detected. An X-ray diagnostic imaging apparatus is known in which an arm supporting an X-ray detector is driven to reverse the X-ray irradiation direction to prevent the skin dose of the subject from becoming excessive (for example, , See Patent Document 1).

JP 2007-89923 A

However, when the skin dose reaches a preset value, it is necessary to interrupt the test and drive the arm. Therefore, if the test cannot be interrupted, skin damage can be avoided by excessive exposure. There is a problem that cannot be done.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an X-ray diagnostic imaging apparatus that can reduce skin disorders of a subject.

In order to solve the above problem, an X-ray image diagnostic apparatus of the present invention is based on an operation means capable of inputting examination information for examining a subject, and examination information input from the operation means. X-ray irradiation means for irradiating the subject with X-rays, and X-ray irradiation means for irradiation,
X-ray detection means for detecting X-rays transmitted through the subject, and X detected by the X-ray detection means
An image generating means for generating an X-ray image based on a line; an exposure information generating means for generating exposure information of the subject corresponding to the X-ray image based on the examination information; and an operation for stopping X-ray fluoroscopy , According to at least one of the X-ray imaging operation and the inspection end operation,
And a display means for displaying the exposure information together with the X-ray image.

1 is a block diagram showing a configuration of an X-ray image diagnostic apparatus according to an embodiment of the present invention. The flowchart which shows operation | movement of the X-ray-image diagnostic apparatus which concerns on the Example of this invention. The figure which shows an example of the 1st synthetic | combination data displayed on the screen of the 1st monitor which concerns on the Example of this invention. The figure which shows the other example of the gauge data contained in the 1st synthetic | combination data based on the Example of this invention. The figure which shows an example of the 2nd synthetic | combination data containing the area | region data displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows the other example of the 2nd synthetic | combination data containing the area | region data displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows an example of the area | region data 3D model displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows an example of the 2nd synthetic | combination data containing the maximum area | region data and perspective graph which were displayed on the screen of the 2nd monitor which concerns on the Example of this invention. The figure which shows the detail of the perspective graph shown in FIG. The figure which shows the detail of the imaging | photography graph displayed on the 4th display area of the 2nd monitor which concerns on the Example of this invention. The figure which shows an example of the 2nd synthetic | combination data containing the warning area data displayed on the screen of the 2nd monitor which concerns on the Example of this invention.

  Examples of the present invention will be described.

Embodiments of an X-ray image diagnostic apparatus according to the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing a configuration of an X-ray image diagnostic apparatus according to an embodiment of the present invention. The X-ray diagnostic imaging apparatus 100 generates an X-ray irradiation unit 10 that irradiates a subject P placed on the top board 7 with X-rays and a high voltage necessary for the X-ray irradiation of the X-ray irradiation unit 10. High voltage generator 20 and X
An X-ray detection unit 30 that detects X-rays transmitted through the subject P by X-ray irradiation of the X-ray irradiation unit 10 and generates X-ray projection data.

The X-ray diagnostic imaging apparatus 100 moves the arm 8 that holds the X-ray irradiation unit 10 and the X-ray detection unit 30 that is disposed to face the X-ray irradiation unit 10, and the top plate 7 and the arm 8. Based on the information on the X-rays emitted from the mechanism unit 40, the image data generation unit 50 that processes the X-ray projection data generated by the X-ray detection unit 30 and generates image data, and the X-ray irradiation unit 10. And an exposure information creation unit 60 for creating exposure information of the subject P.

Furthermore, the X-ray diagnostic imaging apparatus 100 includes a display unit 70 that displays image data generated by the image data generation unit 50 and exposure information generated by the exposure information generation unit 60, and a name and height for identifying the subject P. And an operation unit 80 for inputting examination information for examining the subject P, such as subject information including body weight, imaging region, fluoroscopic conditions, imaging conditions, and the like, and controlling these units as a whole And a system control unit 90.

The X-ray irradiation unit 10 is arranged between the X-ray tube 11 that generates X-rays and the X-ray tube 11 that is disposed between the X-ray tube 11 and the subject P and limits the range of X-rays that are irradiated to the subject P. And. And
The X-ray tube 11 includes a high voltage generator 20 based on the fluoroscopic conditions supplied from the system controller 90.
X-rays for fluoroscopy are generated by the high voltage supplied from. In addition, the frame rate is determined during the imaging irradiation time by one shot of X-rays for generating one frame of image data by a high voltage supplied from the high voltage generator 20 based on the imaging conditions, or by a high voltage of a plurality of pulses. X-rays for generating image data of the number of frames multiplied by.

Further, the X-ray diaphragm 12 is used for fluoroscopy and radiography from the X-ray tube 11 that irradiates the subject P based on the information on the irradiation field included in the fluoroscopy conditions and radiographing conditions supplied from the system control unit 90. Limit the range of X-rays.

The high voltage generator 20 includes a tube voltage included in the fluoroscopic condition supplied from the system controller 90,
The X-ray tube 11 of the X-ray irradiator 10 is fluoroscopically based on fluoroscopic irradiation conditions such as tube current and information on imaging irradiation conditions such as tube voltage, tube current, frame rate, and X-ray irradiation time included in the imaging conditions. X for
A high voltage for generating X-rays for imaging and X-rays is supplied to the X-ray tube 11.

The X-ray detection unit 30 processes an X-ray detector 31 that detects X-rays irradiated from the X-ray diaphragm 12 of the X-ray irradiation unit 10 and transmitted through the subject P, and a signal from the X-ray detector 31. And a signal processing unit 32 for generating X-ray projection data.

The X-ray detector 31 includes, for example, a detection element that converts incident X-rays into electric charge, a gate driver that supplies a drive pulse for reading to the detection element, an amplifier that converts electric charge accumulated in the detection element into voltage, and an amplifier A multiplexer that selects a signal output from the A / D converter, an A / D converter that converts an analog signal from the multiplexer into a digital signal, and the like. In addition, a moving mechanism that can move the position back and forth with respect to the X-ray tube 11 of the X-ray irradiation unit 10 is provided, and the distance (SID) from the X-ray tube 11 can be adjusted. In addition, it has an X-ray detection surface for incident X-rays transmitted through the subject P, and an X-ray input field size (FOV) on the X-ray detection surface.
Can be adjusted.

An image intensifier that detects X-rays transmitted through the subject P and converts them into light,
A TV camera that captures the light from this image intensifier and converts it into an electrical signal,
And an A / D converter that converts an electrical signal from the TV camera into a digital signal
You may implement so that line projection data may be produced | generated.

The mechanism unit 40 includes a top plate moving mechanism 41 that moves the top plate 7 on which the subject P is placed in the longitudinal direction, the width direction, and the vertical direction, and an arm rotation that rotates the arm 8 around the subject P. A moving mechanism 42;
A mechanism control unit 43 that controls the top plate moving mechanism 41 and the arm rotation mechanism 42 is provided.

The top board moving mechanism 41 moves the top board 7 on which the subject P is placed to an imaging position where X-ray fluoroscopy and X-ray imaging of the imaging part of the subject P can be performed. Further, the arm moving mechanism 42 rotates the arm 8 to an angle at which X-ray fluoroscopy and X-ray imaging of the imaging part of the subject P on the top 7 can be performed.

The image data generation unit 50 processes the X-ray projection data generated by the signal processing unit 32 of the X-ray detection unit 30 to generate image data such as fluoroscopic image data and captured image data, and stores the generated image data And output to the display unit 70.

The exposure information creation unit 60 includes subject information supplied from the system control unit 90, fluoroscopic irradiation conditions, X-ray fluoroscopy time, imaging irradiation conditions and the number of imaging operations, irradiation field, position of the top board 7, and angle of the arm 8. The exposure information of the subject P corresponding to the image data generated by the image data generation unit 50 is created based on the examination information such as the imaging region and SID, and the created exposure information is output to the display unit 70.

Then, exposure information is created in accordance with an operation for starting X-ray fluoroscopy, an operation for stopping X-ray fluoroscopy, an operation for X-ray imaging, and an operation for ending the test after an operation for starting the test is performed from the operation unit 80. . Further, for example, the position of the top plate 7, the angle of the arm 8, the SID, the FOV, the image magnification, the irradiation field, the fluoroscopic irradiation condition, the imaging irradiation condition, etc. accompanied by the change of the X-ray irradiation area or irradiation dose to the subject P The exposure information is created in accordance with the operation for changing the fluoroscopy conditions and the imaging conditions.

Here, the X-ray irradiation region irradiated to the subject P from the cumulative X-ray dose irradiated to the subject P from the start of the examination operation to the generation of the image data by the image data generation unit 50 The cumulative skin dose in the maximum region where the cumulative skin dose is maximum is calculated. Next, gauge data representing the ratio of the calculated cumulative skin dose to a preset warning dose at risk of developing a skin disorder such as a burn is created.

In addition, the X-ray irradiated to the subject P from the start of the operation to the start of the operation in accordance with the operation of stopping fluoroscopy, the operation of X-ray imaging, and the operation of ending the inspection. Of the irradiation regions, region data representing the irradiation region excluding the irradiation region corresponding to the region of the last image data generated by the image data generation unit 50 when the operation is performed is created. In addition, a rotatable three-dimensional 3D model (or a two-dimensional 2D model) in which the subject P including the imaging part is modeled based on the information on the imaging part supplied from the system control unit 90 is created. 3D region data (or 2) for representing on the surface of the 3D model (or 2D model) an X-ray irradiation region irradiated on the subject P from the start of the examination of the subject P to when the operation is performed.
Region data display 3D model (or region data 2) in which the created 3D region data (or 2D region data) is superimposed on the 3D model (or 2D model) surface.
D model) is created. Further, it corresponds to the last image data area when the operation is performed, among the X-ray irradiation areas irradiated on the subject P after the operation for starting the examination is performed. Maximum area data representing an irradiation area in which the integrated skin dose of the irradiation area is maximum is created. In addition, the subject P is measured after the operation for starting the examination is performed until the operation is performed.
Warning area data representing an irradiation area in which the cumulative skin dose of the irradiation area corresponding to the area of the last image data when the operation is performed is equal to or higher than the warning dose among the X-ray irradiation areas irradiated to create.

Furthermore, the exposure of the subject P that predicts the subsequent operation according to the change operation of the examination information including the change of the X-ray irradiation area or the X-ray dose irradiated to the subject P after the examination start operation is performed. Create a graph that is information.

Here, the fluoroscopic X-ray irradiation time changed in accordance with the change in the examination information, the fluoroscopic X-ray irradiation time changed in accordance with the change in the examination information, and the examination of the subject P are started. Thereafter, a perspective graph is created that represents the relationship with the cumulative skin dose calculated from the cumulative X-ray dose irradiated to the irradiation region of the subject P corresponding to the region of interest designated on the image data from the operation unit 80.

Further, the number of times of imaging with the imaging X-ray changed according to the change of the examination information, and the examination of the subject P corresponding to the region of interest designated on the image data from the operation unit 80 after the examination of the subject P is started. An imaging graph representing the relationship with the cumulative skin dose calculated from the cumulative X-ray dose irradiated to the irradiation region is created.

The display unit 70 combines the image data generated by the image data generation unit 50 and the exposure information generated by the exposure information generation unit 60, and combines the image data combined with the exposure information by the combination unit 71. A first monitor 72 for displaying data and a second monitor 73 adjacent to the first monitor 72 are provided.

The synthesizer 71 outputs the image data generated by the image data generator 50 to the first monitor 72. Further, the image data generated by the image data generation unit 50 and the gauge data generated by the exposure information generation unit 60 corresponding to the image data are combined, and the combined first combined data is output to the first monitor 72. To do.

The combining unit 71 outputs the region data 2D model and the region data 3D model created by the exposure information creating unit 60 to the second monitor 73. Also, the image data generated by the image data generation unit 50 and the exposure information such as the area data, the maximum area data, the warning area data, and the graph generated by the exposure information generation unit 60 corresponding to the image data are combined and combined. The second synthesized data is output to the second monitor 73.

Here, the image data generated by the image data generation unit 50 and the area data generated by the exposure information generation unit 60 are combined. Further, the image data generated by the image data generation unit 50 and the maximum area data generated by the exposure information generation unit 60 are combined. The image data generation unit 5
The image data generated at 0 and the graph generated by the exposure information generation unit 60 corresponding to the region of interest specified on the image data are synthesized. Further, the image data generated by the image data generation unit 50, the maximum area data generated by the exposure information generation unit 60, and a graph corresponding to the maximum area data are synthesized. Further, the image data generated by the image data generation unit 50 and the warning area data generated by the exposure information generation unit 60 are combined.

The first monitor 72 is provided mainly for displaying the image data generated by the image data generating unit 50, and displays the image data output from the combining unit 71 and the first combined data. The second monitor 73 is provided mainly for displaying the exposure information created by the exposure information creation unit 60, and the second synthesized data, area data 2D model, and area data 3D output from the synthesis unit 71. Display the model.

The operation unit 80 is an interactive interface including an input device such as a keyboard, a trackball, a joystick, and a mouse, a display panel, and various switches. The operation unit 80 is used to input fluoroscopy conditions and imaging conditions included in inspection information. The operation of moving the top board 7 and the arm 8, the operation of starting the inspection for starting the inspection, the operation of ending the inspection for ending the inspection, the operation for starting the X-ray fluoroscopy for starting the X-ray fluoroscopy, and the X for stopping the X-ray fluoroscopy An operation of stopping fluoroscopy, an operation of X-ray imaging for performing X-ray imaging, and the like are performed.

The system control unit 90 includes a CPU and a storage circuit, temporarily stores input information supplied from the operation unit 80, and then, based on the input information, the X-ray irradiation unit 10, the high voltage generation unit 20, and the X
Line detection unit 30, mechanism unit 40, image data generation unit 50, exposure information generation unit 60, and display unit 7
Controls each unit of 0 and the entire system.

Hereinafter, an example of the operation of the X-ray image diagnostic apparatus 100 will be described with reference to FIGS. 1 to 11.
FIG. 2 is a flowchart showing the operation of the X-ray image diagnostic apparatus 100. FIG. 3 is a diagram illustrating an example of the first combined data displayed on the screen of the first monitor 72. FIG. 4 is a diagram illustrating another example of gauge data included in the first composite data. FIG. 5 is a diagram illustrating an example of second synthesized data including area data displayed on the screen of the second monitor 73. FIG. 6 is a diagram illustrating another example of the second combined data including the area data displayed on the screen of the second monitor 73.

FIG. 7 is a diagram illustrating an example of the area data 3D model displayed on the screen of the second monitor 73. FIG. 8 is a diagram illustrating an example of the second combined data including the maximum area data and the perspective graph displayed on the screen of the second monitor 73. FIG. 9 is a diagram showing details of the perspective graph shown in FIG. FIG. 10 is a diagram showing details of the photographing graph. FIG. 11 is a diagram illustrating an example of second combined data including warning area data displayed on the screen of the second monitor 73.

In FIG. 2, when an examination start operation is performed by inputting examination information of the subject P, the X-ray image diagnostic apparatus 100 starts an operation (step S1).

When the operation unit 80 for moving the imaging part of the subject P placed on the top plate 7 to the imaging position is performed, the top plate moving mechanism 41 is controlled by the mechanism control unit 43 of the mechanism unit 40. The arm rotation mechanism 42 rotates the arm 8. Then, the imaging part of the subject P is set as the imaging position.

Next, when an operation for starting X-ray fluoroscopy is performed from the operation unit 80, for example, the system control unit 90
Instructs the X-ray fluoroscopy to the X-ray irradiation unit 10, the high voltage generation unit 20, the X-ray detection unit 30, the mechanism unit 40, the image data generation unit 50, the exposure information generation unit 60, and the display unit 70. High voltage generator 20
Supplies a high voltage for fluoroscopy to the X-ray tube 11 of the X-ray irradiation unit 10. The X-ray tube 11 generates X-rays for fluoroscopy according to the high voltage supplied from the high voltage generator 20. The X-ray diaphragm 12 irradiates the subject P with X-rays from the X-ray tube 11 restricted based on the information of the first irradiation field supplied from the system control unit 90.

The X-ray detection unit 30 detects X-rays transmitted through the subject P, generates X-ray projection data, and outputs the generated X-ray projection data to the image data generation unit 50. The image data generation unit 50 processes the X-ray projection data output from the X-ray detection unit 30 to generate perspective image data, and outputs the generated perspective image data to the synthesis unit 71 of the display unit 70.

The exposure information creation unit 60 is operated after the subject information supplied from the system control unit 90, the fluoroscopic conditions, the position of the top plate 7, the angle of the arm 8, the imaging region, the SID, and the operation for starting fluoroscopy. Based on the X-ray fluoroscopy time information when the specimen P is irradiated with fluoroscopic X-rays, the cumulative total of the irradiation of the subject P from the start of the examination to the generation of fluoroscopic image data by the image data generation unit 50 X
From the dose, the cumulative skin dose in the irradiation region in which the cumulative skin dose in the X-ray irradiation region irradiated on the subject P is maximized is calculated. Next, gauge data representing the ratio of the calculated cumulative skin dose to a preset warning dose is created, and the created gauge data is output to the combining unit 71.

The synthesizing unit 71 synthesizes the fluoroscopic image data output from the image data generating unit 50 and the gauge data output from the exposure information generating unit 60 corresponding to the fluoroscopic image data, and combines the synthesized first synthetic data into the first. Are output to the monitor 72. The first monitor 72 displays the first combined data output from the combining unit 71 in real time (step S2).

FIG. 3 is a diagram illustrating an example of first composite data displayed on the screen of the first monitor 72. The screen 72a includes a first display area 721 for displaying image data and exposure information from the combining unit 71, and a second display area 722 arranged adjacent to the first display area 721.
The first composite data 723 is displayed in the first and second display areas 721 and 722.

The first composite data 723 includes perspective image data 724 and gauge data 725 represented by, for example, a progress bar. The perspective image data 724 is displayed in real time in the first display area 721, and the gauge data 725 is displayed in real time in the second display area 722.

The gauge data 725 starts the examination of the subject P based on the ratio of the cumulative skin dose to the warning dose in the irradiation region where the cumulative skin dose in the X-ray irradiation region irradiated on the subject P is maximum. The cumulative skin dose before the start of X-ray irradiation is “0%”, and when the warning dose is reached, for example, “100%”. The proportion of the shaded bar extends in the direction of arrow L1 as the cumulative skin dose increases.

The gauge data 725 is displayed in the second display area 722 until the operation for deleting the gauge data 725 after the operation for ending the inspection or the operation for starting the next inspection is performed after the operation for starting the inspection is performed. Is done.

In addition, you may implement so that the value of the cumulative skin dose and warning dose in the irradiation region which becomes the maximum may be displayed in the second display area 722. In addition, using a pie chart, as shown in FIG.
“0%”, the ratio of the calculated cumulative skin dose to the warning dose, “100%” is displayed, and the proportion of the angle of the hatched portion increases in the direction of the arrow R1 as the cumulative skin dose increases. Also good.

As described above, the gauge data 725 can be displayed on the first monitor 72 together with the perspective image data 724. This makes it possible to easily grasp in real time the cumulative skin dose in the irradiation region where the cumulative skin dose is maximized among the X-ray irradiation regions irradiated to the subject P, and to reduce the risk of skin damage. Inspection can be performed in consideration.

Next, the bar of the hatched portion of the gauge data 725 displayed in the second display area 722 of the first monitor 72 after the operation of changing the irradiation field for three times, for example, is performed from the operation unit 80.
If the operation of stopping fluoroscopy is performed when less than 00% is indicated, the image data generating unit 5
0 processes the X-ray projection data output from the X-ray detection unit 30 to generate the last fluoroscopic image data when the X-ray fluoroscopic stop operation is performed, and the generated fluoroscopic image data is displayed on the display unit 70. Is output to the combining unit 71.

The exposure information creating unit 60 is the last fluoroscopic image generated when the operation is performed in the X-ray irradiation region irradiated on the subject P from the start of the examination to the operation of stopping the X-ray fluoroscopy. Area data representing an irradiation area excluding the irradiation area corresponding to the area of the image data is created, and the created area data is output to the combining unit 71. The synthesizing unit 71 synthesizes the stationary fluoroscopic image data output from the image data generating unit 50 and the area data output from the exposure information generating unit 60 corresponding to the fluoroscopic image data, and includes the synthesized area data. 2 combined data to the second monitor 73
Output to. The second monitor 73 displays the second combined data including the area data output from the combining unit 71 (Step S3 in FIG. 2).

FIG. 5 is a diagram illustrating an example of second synthesized data including area data displayed on the screen of the second monitor 73. The screen 73 a is configured by a third display area 731 and a fourth display area 732 arranged adjacent to the third display area 731, and the second combined data 733 is displayed in the third display area 731. Has been.

The second composite data 733 is composed of still perspective image data 7331 and region data 7332 to 7334 surrounded by three square frames color-coded in an identifiable manner displayed superimposed on the perspective image data 7331, for example. Is done. The three area data 7332
The region surrounded by 7334 to 7334 may be displayed by being color-coded with a color having transparency so that each region can be identified.

The area data 7332 corresponds to the irradiation area of the subject P irradiated with the X-rays from the X-ray diaphragm 12 restricted based on the information of the first irradiation field after the examination is started. Also,
The area data 7333 corresponds to the irradiation area of the subject P irradiated with the X-rays from the X-ray diaphragm 12 restricted based on the information of the second irradiation field. Further, the area data 7334 corresponds to the irradiation area of the subject P irradiated with the X-rays from the X-ray diaphragm 12 restricted based on the information of the third irradiation field. Furthermore, the fluoroscopic image data 7331 corresponds to the image data generated by the X-ray irradiation from the X-ray diaphragm 12 restricted based on the information of the fourth irradiation field.

The second combined data 733 is displayed in the third display area 731, and the gauge data 7 displayed in the second display area 722 of the first monitor 72 in the fourth display area 732.
25 may be displayed.

As described above, in accordance with the operation for stopping the fluoroscopy from the operation unit 80, the stationary fluoroscopic image data 7331 is displayed on the second monitor 73 and the region data 7332 to 7334 is displayed on the fluoroscopic image data 7331. be able to. Thereby, the irradiation area | region of the X-ray irradiated during the test | inspection of the subject P can be grasped | ascertained easily.

Of the X-ray irradiation area irradiated to the subject P from the start of the examination to the operation of stopping the X-ray fluoroscopy, the area deviates from the area of the last fluoroscopic image data 7331 when the operation is performed, If there is an irradiation area corresponding to the area included in the third display area 731, area data representing the irradiation area is created. Then, as shown in FIG.
335 can be displayed in the third display area 731.

Thus, the area data 7335 outside the area of the perspective image data 7331 included in the third display area 731 can be displayed. Thus, X irradiated during the examination of the subject P
The irradiation area of the line can be grasped over a wide range.

Here, when an operation for displaying, for example, the region data 3D model is performed from the operation unit 80,
The exposure information creation unit 60 is based on the information on the imaging region supplied from the system control unit 90.
A rotatable three-dimensional 3D model that models the subject P including the imaging region is created, and the subject P is inspected from the start of the examination of the subject P to the operation of stopping the fluoroscopy. After creating 3D area data for representing the irradiated X-ray irradiation area on the surface of the 3D model, an area data 3D model is created by superimposing the created 3D area data on the 3D model surface. Then, the generated region data 3D model is output to the synthesis unit 71. The combining unit 71
The region data 3D model output from the exposure information creation unit 60 is output to the second monitor 73. The second monitor 73 displays the area data 3D model output from the synthesis unit 71.

FIG. 7 is a diagram illustrating an example of the area data 3D model displayed on the screen of the second monitor 73. The area data 3D model 734 is displayed in the third display area 731 of the screen 73c.

The region data 3D model 734 includes the 3D model 7341 of the subject P created by the exposure information creation unit 60 based on the information on the imaging region supplied from the system control unit 90, and the X-ray fluoroscopy is stopped after the examination is started. The X-ray irradiation area irradiated to the subject P before the operation of 3D model 7
3D region data 7342 to 7345 to be represented on the surface 341.

The 3D area data 7342 is, for example, the perspective image data 73 displayed on the screen 73a of FIG.
3D region data 7343 corresponds to the region of region data 7332. The 3D area data 7344 corresponds to the area of the area data 7333, and the 3D area data 7345 corresponds to the area of the area data 7334.

When a rotation operation is performed from the operation unit 80, the area data 3D model 3D734 is
The 3D model 7341 is displayed from a desired angle rotated in the arrow R1 direction with the body axis as the rotation axis.

Thus, by displaying the area data 3D model 734 on the second monitor 73,
All irradiation areas of X-rays irradiated during the examination of the subject P can be displayed. Further, by rotating the region data 3D model 734, it is possible to observe all irradiation regions of the X-rays irradiated to the subject P from various directions.

After step S3 in FIG. 2, for example, a fluoroscopy condition changing operation is performed from the operation unit 80, and then a region of interest designating operation for displaying the maximum region where the cumulative skin dose is maximized and designating the maximum region is performed. Then, the exposure information creation unit 60 uses the accumulated X-ray dose irradiated to the subject P from the start of the examination to the generation of the fluoroscopic image data 7331, within the X-ray irradiation region irradiated to the subject P, The maximum area data representing the irradiation area where the accumulated skin dose of the irradiation area corresponding to the area of the fluoroscopic image data 7331 is maximized, and a fluoroscopic graph for predicting X-ray fluoroscopy corresponding to the maximum area data are created. The generated maximum area data and perspective graph are then combined with the synthesizing unit 7.
Output to 1.

The synthesizing unit 71 synthesizes the fluoroscopic image data 7331 output from the image data generating unit 50 and the maximum area data and fluoroscopic graph output from the exposure information generating unit 60 corresponding to the fluoroscopic image data 7331, and combines them. The second composite data including the area data and the perspective graph is output to the second monitor 73. The second monitor 73 displays the second combined data including the maximum area data output from the combining unit 71 and the perspective graph (step S4 in FIG. 2).
.

FIG. 8 is a diagram illustrating an example of the second combined data including the maximum area data and the perspective graph displayed on the screen of the second monitor 73. The third and fourth display areas 7 of the screen 73d
The second composite data 735 is displayed at 31 and 732.

The second composite data 735 includes perspective image data 7331, maximum region data 7351 surrounded by a rectangular frame that can be identified and superimposed on the perspective image data 7331, and the perspective graph 7.
36. The perspective image data 7331 and the maximum area data 7351 are displayed in the third display area 731, and the perspective graph 736 is displayed in the fourth display area 732.

The area corresponding to the maximum area data 7351 is an area of a subset of, for example, three area data 7332 to 7334 displayed on the perspective image data 7331 shown in FIG.

The perspective graph 736 represents the relationship between the fluoroscopic time and the integrated skin dose in the irradiation region corresponding to the maximum region data 7351.

Note that a perspective graph corresponding to the region of interest can be ejected and displayed in the third display area 731 by a mouse operation from the operation unit 80 that moves the cursor to the region of interest on the perspective image data 7331. Further, after the cursor is moved to the region of interest on the fluoroscopic image data 7331, a perspective graph corresponding to the region of interest is pop-up displayed in the third display area 731 by a mouse operation from the operation unit 80 that clicks on the region of interest. can do. Furthermore, by specifying a plurality of regions of interest on the perspective image data 7331, a perspective graph corresponding to the plurality of regions of interest can be displayed in the fourth display area 732.

As described above, the maximum area data 7351 can be displayed on the fluoroscopic image data 7331 displayed on the second monitor 73. As a result, it is possible to easily grasp the irradiation region in which the cumulative skin dose in the irradiation region corresponding to the region of the fluoroscopic image data 7331 becomes the maximum among the X-ray irradiation regions irradiated to the subject P.

FIG. 9 is a diagram showing details of the perspective graph 736 shown in FIG. This perspective graph 73
6 is a graph 7361 expressed as a relationship in which the direction of the horizontal axis is the X-ray irradiation time and the direction of the vertical axis is the cumulative skin dose, 7362 to 7365 extrapolated to the graph 7361, and an operation for starting the examination , The current time line 7366 indicating the time when the X-ray fluoroscopic stop operation is performed, and the warning dose line 7367 indicating the position of the warning dose.

A graph 7361 shows a time zone T from the start of the operation to the current time line 7366.
1 represents the relationship between the irradiation time of X-rays irradiated to 1 and the cumulative skin dose.

A graph 7362 represents a relationship between an irradiation time predicted when X-rays for fluoroscopy are irradiated under a high fluoroscopic irradiation condition set in advance after the current time line 7366 and an integrated skin dose.

A graph 7363 represents the relationship between the irradiation time predicted when the X-ray is irradiated under the fluoroscopic condition before the operation for stopping the X-ray fluoroscopy after the current time line 7366 and the accumulated skin dose.

A graph 7364 represents the relationship between the irradiation time predicted when X-rays are irradiated under the fluoroscopic condition after the current time line 7366 is changed and the cumulative skin dose.

A graph 7365 represents the relationship between the irradiation time and the skin dose predicted when fluoroscopic X-rays are irradiated under the low fluoroscopic irradiation conditions set in advance after the current time line 7366.

As described above, the perspective graph 736 corresponding to the maximum area data 7351 displayed on the second monitor 73 can be displayed by changing the perspective condition from the operation unit 80. Then, by displaying the graph 7361, the X-ray irradiation area irradiated to the subject P
The accumulated skin dose from the start of the examination of the irradiation region corresponding to the maximum region data 7351 to the generation of the fluoroscopic image data 7331 can be grasped.

Further, by displaying the graph 7364, based on the examination information after changing the fluoroscopic conditions, irradiation of fluoroscopic X-rays irradiated after the generation of the fluoroscopic image data 7331 to the irradiation area corresponding to the maximum area data 7351 is performed. The relationship between time and accumulated skin dose can be predicted. Furthermore, by displaying each graph 7362, 7363, 7365, the maximum region data based on the examination information of the preset high fluoroscopic irradiation condition, the fluoroscopic condition before the change, and the preset low fluoroscopic irradiation condition. The relationship between the irradiation time of fluoroscopic X-rays irradiated after the generation of the fluoroscopic image data 7331 to the irradiation region corresponding to 7351 and the integrated skin dose can be predicted.

Thereby, since each irradiation time until reaching the warning dose can be predicted, the irradiation range and irradiation time of the X-rays irradiated to the subject P after the generation of the fluoroscopic image data 7331 can be considered.

If, for example, an imaging condition change operation is performed from the operation unit 80 after step S3, the exposure information creation unit 60 creates the maximum area data 7351 and an imaging graph that predicts X-ray imaging corresponding to the maximum area data 7351. The generated maximum area data 7351 and the photographed graph are output to the combining unit 71. The synthesizing unit 71 synthesizes the fluoroscopic image data 7331 output from the image data generating unit 50 and the maximum area data 7351 and the photographing graph output from the exposure information generating unit 60 corresponding to the fluoroscopic image data 7331. The second combined data including the maximum area data 7351 and the photographing graph is output to the second monitor 73. The second monitor 73 displays the captured graph included in the second combined data output from the combining unit 71 as the fourth.
Are displayed in the display area 732.

FIG. 10 is a diagram showing details of the photographing graph displayed in the fourth display area 732 of the second monitor 73. The imaging graph 737 is expressed as a relationship with the graph 7361, the current time line 7366, and the warning dose line 7367 shown in FIG. 9, with the horizontal axis direction being the number of imaging times and the vertical axis direction being the cumulative skin dose. Graphs 7371 to 737 extrapolated to the graph 7361
4.

A graph 7371 represents the relationship between the number of imaging times estimated when the X-ray for imaging is irradiated under the preset high imaging irradiation conditions after the current time line 7366 and the integrated skin dose.

A graph 7372 represents the relationship between the number of times of imaging and the cumulative skin dose predicted when X-rays are irradiated after the current time line 7366 under the imaging conditions before performing the fluoroscopic stop operation.

A graph 7373 represents a relationship between the number of imaging times estimated when the X-ray is irradiated under the imaging conditions after the change after the current time line 7366 and the integrated skin dose.

A graph 7374 represents the relationship between the number of imagings and the skin dose predicted when X-rays for imaging are irradiated under the preset low imaging irradiation conditions after the current time line 7366.

As described above, the photographing graph 737 corresponding to the maximum area data 7351 displayed on the second monitor 73 can be displayed by the photographing condition changing operation from the operation unit 80. Then, by displaying the graph 7373, based on the examination information after changing the imaging conditions, the number of imaging with the X-rays for imaging irradiated after the fluoroscopic image data 7331 is generated to the irradiation area corresponding to the maximum area data 7351 and The relationship of accumulated skin dose can be predicted. Also, by displaying each graph 7371, 7372, 7374, based on each inspection information of the preset high imaging irradiation conditions, the imaging conditions before the change, the preset low imaging irradiation conditions,
It is possible to predict the relationship between the number of times of imaging with imaging X-rays irradiated after the fluoroscopic image data 7331 is generated to the irradiation area corresponding to the maximum area data 7351 and the integrated skin dose.

Accordingly, since the number of times of imaging until reaching the warning dose can be predicted, the X-ray irradiation range irradiated on the subject P after the generation of the fluoroscopic image data 7331 and the number of times of imaging of the subject P are taken into consideration. can do.

Next, when the shaded bar of the gauge data 725 displayed in the second display area 722 of the first monitor 72 indicates 100% or more, an operation for stopping X-ray fluoroscopy is performed from the operation unit 80. After that, when an operation for displaying the warning dose data is performed, the image data generation unit 50
The X-ray projection data output from the X-ray detection unit 30 is processed to generate the last fluoroscopic image data when an operation for stopping X-ray fluoroscopy is performed, and the generated fluoroscopic image data is output to the synthesizing unit 71. .

Here, it is assumed that the irradiation region corresponding to the region of the last fluoroscopic image data includes an irradiation region in which the integrated skin dose is equal to or higher than the warning dose. In this case, the exposure information creation unit 60 irradiates the subject P from the accumulated X-ray dose irradiated to the subject P from the start of the examination to the generation of the last fluoroscopic image data by the image data generation unit 50. Among the X-ray irradiation areas, a warning representing an irradiation area in which the accumulated skin dose of the irradiation area corresponding to the last fluoroscopic image data area generated by the image data generation unit 50 is equal to or higher than a preset warning dose. Create region data. And
The generated warning area data is output to the synthesis unit 71. The synthesizer 71 includes an image data generator 50
The last stationary fluoroscopic image data output from the image data and the warning area data output from the exposure information generating unit 60 corresponding to the fluoroscopic image data are synthesized, and the second synthesized data including the synthesized warning area data is second. Is output to the monitor 73. The second monitor 73 displays the second combined data including the warning area data output from the combining unit 71 (step S5 in FIG. 2).

FIG. 11 is a diagram showing an example of second synthesized data including warning area data displayed on the screen of the second monitor 73. Second composite data 738 is displayed in the third display area 731 of the screen 73e.

The second composite data 738 is composed of still perspective image data 7381 and warning area data 7382 surrounded by, for example, a square frame so as to be identified and displayed superimposed on the perspective image data 7381. The warning area data 7382 is, for example, data in the same area as the maximum area data 7351 shown in FIG.

In this way, while displaying the still fluoroscopic image data 7381 on the second monitor 73,
By displaying the warning area data 7382, it is possible to easily grasp the irradiation area where the cumulative skin dose within the X-ray irradiation area irradiated to the subject P is equal to or higher than the warning dose. As a result, it is possible to perform an examination in consideration of an increased risk of skin damage, and skin damage can be reduced.

According to the embodiment of the present invention described above, during or after the examination of the subject P created by the exposure information creation unit 60 corresponding to the image data together with the image data generated by the image data generation unit 50 The exposure information in can be displayed.

Then, the fluoroscopic image data 724 is displayed in the first display area 721 of the first monitor 72, and the gauge data 725 is displayed in the second display area 722, whereby the X-rays irradiated on the subject P are displayed. It is possible to easily grasp the integrated skin dose in the irradiation region where the integrated skin dose is maximum among the irradiation regions in real time. In addition, in response to an operation for stopping fluoroscopy, the perspective image data 7331 that is stationary is displayed in the third display area 731 of the second monitor 73, and the region data 7332 through the superimposed image data 7331 are displayed. 7334
By displaying, it is possible to easily grasp the irradiation region of the X-ray irradiated to the subject P. Further, by displaying the region data 7335 outside the region of the fluoroscopic image data 7331 included in the third display area 731, it is possible to grasp the X-ray irradiation region irradiated to the subject P over a wide range. In addition, the area data 3D model 734 is displayed in the third display area 731.
By displaying, it is possible to display all irradiation regions of X-rays irradiated during the examination of the subject P. Further, by rotating the region data 3D model 734, it is possible to see all the irradiation regions of the X-rays irradiated to the subject P from various directions. Further, by displaying the maximum area data 7351 superimposed on the fluoroscopic image data 7331 displayed in the third display area 731, the irradiation corresponding to the area of the fluoroscopic image data 7331 in the irradiation area of the subject P. It is possible to easily grasp the region where the cumulative skin dose of the region is maximum. Further, by displaying the warning area data 7382 superimposed on the fluoroscopic image data 7381 stationary on the second monitor 73, the cumulative skin dose in the X-ray irradiation area irradiated on the subject P is equal to or higher than the warning dose. It is possible to easily grasp the irradiation area. Further, by displaying a perspective graph corresponding to the region of interest on the fluoroscopic image data 7331 displayed in the third display area 731 by changing the fluoroscopic condition, based on the examination information after changing the fluoroscopic condition. It is possible to represent the relationship between the irradiation time of fluoroscopic X-rays to be irradiated and the cumulative skin dose, and the irradiation time until reaching the warning dose can be predicted.

Further, the first display area 7 of the first monitor 72 of the display unit 70 according to the operation of X-ray imaging.
The last captured image data generated by the imaging operation can be displayed on 21, and the gauge data can be displayed on the second display area 722. In addition, the third of the second monitor 73
The last photographed image data can be displayed in the display area 731 and region data can be displayed superimposed on the photographed image data. In addition, area data outside the area of the last captured image data included in the third display area 731 can be displayed. Further, the maximum area data can be displayed superimposed on the last captured image data displayed in the third display area 731. Further, the warning area data can be displayed superimposed on the last captured image data of the second monitor 73. In addition, the third display area 73 can be changed by changing the shooting conditions.
By displaying a photographing graph corresponding to the region of interest on the last photographed image data displayed in 1, the number of times of photographing with X-rays for photographing and integration based on examination information after changing the photographing conditions The relationship between the skin dose can be expressed, and the number of imaging until the warning dose is reached after changing the imaging conditions can be easily predicted. Thereby, the same effect as in the case of X-ray fluoroscopy can be obtained.

As described above, various exposure information can be output in accordance with the state of the inspection during the inspection.
As a result, the exposure information of the subject P can be easily grasped, and the examination can be performed in consideration of the risk of the skin damage of the subject P. Therefore, the skin damage can be reduced.

P Subject 7 Top plate 8 Arm 10 X-ray irradiation unit 11 X-ray tube 12 X-ray restrictor 20 High voltage generation unit 30 X-ray detection unit 31 X-ray detector 32 Signal processing unit 40 Mechanism unit 41 Top plate moving mechanism 42 Arm rotation mechanism 43 Mechanism control unit 50 Image data generation unit 60 Exposure information creation unit 70 Display unit 71 Composition unit 72 First monitor 73 Second monitor 80 Operation unit 90 System control unit

In order to solve the above problem, the X-ray diagnostic imaging apparatus according to the first aspect of the present invention includes an operation unit capable of inputting examination information for examining a subject, and an input from the operation unit. based on the examination information, and the X-ray irradiation means for irradiating X-rays to the subject, is irradiated by the X-ray irradiation means, and the X-ray detection unit that issues detects the X-rays transmitted through the subject, an image producing Narute stage for generating an X-ray image based on the X-rays detected by the X-ray detecting means, before on the basis of the dangerous査information, the exposure information of the subject corresponding to the X-ray image , X-ray fluoroscopy stop operation, X-ray imaging
And an exposure information creating means that is created in response to at least one of the operation and the operation for ending the examination .

Claims (7)

An operation means capable of inputting examination information for examining a subject;
X-ray irradiation means for irradiating the subject with X-rays based on examination information input from the operation means;
X-ray detection means for detecting X-rays irradiated by the X-ray irradiation means and transmitted through the subject;
Image generating means for generating an X-ray image based on the X-rays detected by the X-ray detecting means;
Exposure information creating means for creating exposure information of the subject corresponding to the X-ray image based on the examination information;
Display means for displaying the exposure information together with the X-ray image in response to at least one of X-ray fluoroscopic stop operation, X-ray imaging operation, and examination end operation;
An X-ray diagnostic imaging apparatus comprising: The X-ray image diagnosis apparatus according to claim 1, wherein the display unit superimposes and displays region data as the exposure information on an X-ray image that is a still image obtained immediately before the end of X-ray irradiation. The X-ray diagnostic imaging apparatus according to claim 1, wherein the display unit superimposes and displays region data as the exposure information on a model of the subject. The exposure information creating means creates gauge data representing a ratio of the calculated cumulative skin dose to a preset warning dose,
The X-ray diagnostic imaging apparatus according to claim 1, wherein the display unit displays gauge data created by the exposure information creation unit in the vicinity of the X-ray image. The exposure information creating means creates warning area data representing an irradiation area in which the cumulative skin dose is equal to or higher than a preset warning dose,
The X-ray image diagnosis apparatus according to claim 1, wherein the display unit displays the warning area data superimposed on the X-ray image. The exposure information creating unit is configured to irradiate the subject with X after starting the examination of the subject.
6. The exposure information of the subject that is predicted by the X-ray irradiation after the change of the examination information is created according to the examination information changing operation including the change of the X-ray irradiation area or the X-ray dose. An X-ray diagnostic imaging apparatus according to claim 1. The operation means designates a region of interest on the X-ray image,
The exposure information creating means sets the irradiation time of the fluoroscopic X-ray changed according to the change of the examination information, and the irradiation area of the subject corresponding to the region of interest after starting the examination of the subject. Create a graph showing the relationship with the cumulative skin dose calculated from the cumulative X-ray dose irradiated,
The X-ray image diagnosis apparatus according to claim 6, wherein the display unit displays the graph in a pop-up display or superimposed on the X-ray image.

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