JP2015047194A5 - - Google Patents

Description

The present invention relates to an X-ray diagnostic apparatus that irradiates a subject with X-rays and captures an X-ray image, and a data processing method thereof .

The X-ray diagnostic apparatus detects an X-ray signal of a subject by irradiating the subject with X-rays and detecting an X-ray transmitted through the subject with an X-ray detector, and based on the detected X-ray signal An X-ray image is generated. The resulting X-ray image, or displayed on a display device, or printed are sent to the printer connected to the X-ray diagnosis apparatus, that turns out to have been transmitted to an external server using a network.

The photographed X-ray image is used for diagnosis of various parts of the body. For this reason, an X-ray image used for diagnosis may be generated by connecting a plurality of X-ray images depending on the purpose of diagnosis and the site to be diagnosed. This will be described below with an example of a leg venography test for confirming the shape and the like of the leg vein. In this test, obtaining the captured image of the contrast medium by injecting concrete Kagezai the instep vein flowing in the blood vessel. Thus, a lower limb vein contrast examination for obtaining information such as the shape of the lower limb vein is performed by capturing a captured image of the contrast medium flowing in the blood vessel. Various lesions such as vein occlusion, stenosis, collateral path formation, valve abnormality, venous thrombus, and varicose veins can be confirmed from the obtained X-ray image.

In lower limb venography, the region of interest often exceeds the imaging range of the X-ray detector due to the contrast agent moving in the blood vessel. In this case, while moving the X-ray detector or the top plate of the X-ray diagnostic apparatus so as to follow the movement of the contrast agent, a contrast image is captured so as to cover the region of interest by a plurality of imaging. By performing a plurality of imaging operations as described above, a contrast image of the venous blood vessel of the entire lower limb covering the region of interest is captured. After capturing a plurality of images, a contrast image of the venous blood vessel in the region of interest of the lower limb is captured, and then the contrast images of the plurality of venous blood vessels are bonded together and synthesized as a single medical image. In this way, a long image that is an image that allows the entire imaging region to be viewed is generated.

If X-ray imaging is insufficient, it is very wasteful to perform X-ray imaging again, and the influence on the subject is very large. In particular, when X-ray imaging using a contrast image is insufficient, re-examination is accompanied with great clinical difficulty. Therefore, more than necessary images, for example, contrast images, are captured not only for the purpose of covering the region of interest but also for obtaining a more appropriate X-ray image. In order to generate a medical image to be used for diagnosis, an operation of selecting an X-ray image to be pasted together from images taken by X-ray imaging occurs. When there are many photographed X-ray images, an operation for selecting an image to be used for pasting from many X-ray photographed images occurs. It is desirable that the operation of selecting an X-ray image to be pasted from a plurality of captured images or from a large number of captured images can be performed more efficiently.

In order to solve the above problems, an X-ray diagnostic apparatus of the present invention includes an X-ray tube that irradiates a subject with X-rays, an X-ray detector that detects X-rays transmitted through the subject , and the subject A top plate that moves in the body axis direction of the subject, a storage device that stores an X-ray image based on a detection result of the X-ray detector, a control unit, an operation unit that performs an operation, and a display unit, in the storage device, the X-ray image captured in a plurality of photographing positions overlapping a region of interest of the subject is stored, the imaging position of the X-ray image on the display unit a plurality X-ray images for generating a long image from a plurality of photographed X-ray images are displayed, and the X-ray images of the selected imaging positions are displayed by selecting the displayed imaging positions. Is specified, and a long image is generated based on the specified X-ray image. It is characterized by a door.

The control unit 150 is a device that performs various image processing based on the image data detected by the X-ray detector 80 .
The control unit 150 receives the image data detected by the X-ray detector 80 and converted into a digital signal, performs image processing to be used for diagnosis based on the received image data, and the image processed image data is processed. The data is transmitted to the data processing unit 170. In the control unit 150, if example embodiment, gamma conversion and, and gradation conversion processing, and other, enlargement or reduction of an image, the image of the top and bottom and right and left reversed, a variety of image processing including reversing the like monochrome performed.

In the display area 252 of the operation screen 210 has been displayed portion 200 according to FIG. 2, the file name and a series of X-ray image which is the target of the joining process of the X-ray image, and the object name, the object gender and, and the subject age, and examination ID for identifying the test operations were carried out a series of shooting region to be examined, and the like are displayed. The display area 254 is used for an operation of selecting an X-ray image to be used for generating a long image from X-ray images taken during the examination. Each X-ray image taken during the examination is numbered sequentially.
The numbers described in the illustrated image specifying column 256 are the above-described numbers, and each X-ray image can be specified by this number. However, identification of each image is not limited to this method, and it is sufficient to have a function for identifying each captured image, and not only numbers but also characters may be used. The display area 252 is provided with an image number column 256, an application column 257 for instructing selection, and a rank column 258 for instructing a display order or a joining order.

The long image generation button 272 is a button for executing generation of a long image from the image data of the original image selected in the display area 250. The end button 274 is a button for ending the long image generation screen.

[6. (Detection of omissions)
It is important to prevent omissions in shooting long images. In the body axis direction of the subject, it is desirable that the captured images are connected in an overlapping manner. If the overlapping portion is interrupted, it is difficult to generate a long image. FIG. 22 is a flowchart executed at regular intervals to solve the above problem. Since the flowchart of FIG. 12 is executed in a short cycle, the operator always functions as if this flowchart is operating.

Step S400 is started, and it is detected in step S402 whether or not the imaging position has moved in the body axis direction of the subject . If it has not moved, since it is not necessary to execute step S412, step S414, and step S416, the process proceeds to step S432. If the shooting position has moved, it is calculated in step S412 whether or not the newly moved shooting position has an overlap with the previous shooting position. For example, if it is determined by the calculation in step S412 that the overlapping portion does not exist because the top plate 60 has been moved too much, the execution moves from step S414 to step S416. In step S416, an error is displayed, and a warning is displayed that there is no overlapping portion at the photographing position.

In step S432, it is determined whether shooting has been completed. If shooting has been completed, it is calculated in step S434 whether there is no shooting omission. If the X-ray images are connected through the overlapped portion as a result of the calculation in step S434, it is determined that there is no imaging omission. If there is a leak, execution proceeds to step S444, a warning is issued, and an error display appears. If a problem is found at this time, the subject is in a state of being placed on the top 60, and it is possible to take measures such as performing X-ray imaging of the leaked portion.

Claims (10)

An X-ray tube that irradiates the subject with X-rays;
An X-ray detector for detecting X-rays transmitted through the subject ;
A top plate for placing the subject and moving in the body axis direction of the subject;
A storage device for storing an X-ray image based on the detection result of the X-ray detector;
A control unit;
An operation unit for performing an operation;
A display unit,
Wherein the storage device, the plurality of X-ray images taken divided into shooting position overlapping a region of interest of the subject are stored,
The imaging position of the X-ray image is displayed more, the X-ray image of said selected imaging position is displayed by selecting the displayed said photographing position on said display unit,
X-ray diagnosis for specifying an X-ray image for generating a long image from a plurality of X-ray images taken, and generating a long image based on the specified X-ray image apparatus. The X-ray diagnostic apparatus according to claim 1,
A position adjustment unit that adjusts a positional relationship between at least two displayed X-ray images is provided, and the positional relationship between the displayed X-ray images changes based on an operation of the position adjustment unit. X-ray diagnostic apparatus characterized by the above. The X-ray diagnostic apparatus according to claim 1,
The storage device stores information representing the imaging positions of the plurality of X-ray images in addition to the plurality of X-ray images captured at a plurality of imaging positions, and a display area provided on the screen in the display unit The X-ray diagnostic apparatus is characterized in that the plurality of imaging positions are displayed at the coordinate positions of the display area based on information representing the imaging positions according to the coordinates. In the X-ray diagnostic apparatus according to claim 3,
Wherein a mechanism control unit for controlling the position of the X-ray tube for generating a bed controller and the X-ray to control the position of the top plate is provided, said information indicating the shooting position and the position of the front Symbol tabletop the X-ray An X-ray diagnostic apparatus characterized by corresponding to the position of a tube. The X-ray diagnostic apparatus according to claim 4,
Is detected prior Symbol the X-rays transmitted through the subject contrast agent is injected by the X-ray detector, by displaying on the display unit a detection result of the X-ray detector continuously at predetermined time intervals , the screen of the display unit, the display state of the contrast medium flowing in the subject, based on the operation of the imaging instruction, the detection result of the X-ray detector is taken as an X-ray image, the photographing position at that time An X-ray diagnostic apparatus characterized by being stored in the storage device together with information representing The X-ray diagnostic apparatus according to claim 4,
An X-ray diagnostic apparatus characterized by calculating whether a new imaging position based on the operation of moving the top plate overlaps the previous imaging position in the body axis direction, and gives a warning if they do not overlap. The X-ray diagnostic apparatus according to claim 1,
When a plurality of X-ray images at a selected said imaging position has been taken, the selection one of the plurality of X-ray images by the operation but is displayed, further not displayed the plurality of other X-ray An X-ray diagnostic apparatus, wherein a symbol for displaying an image is displayed, and the plurality of other X-ray images are displayed by operating the symbol. The X-ray diagnostic apparatus according to claim 1,
When the imaging position is selected, an X-ray image of the selected imaging position is displayed. When the application image used for the joining process is determined, the X-ray image at the imaging position is converted to the applied image. An X-ray diagnostic apparatus characterized in that the display changes to a display. The X-ray diagnostic apparatus according to claim 1 or 8,
A plurality of the imaging positions overlapping each other are displayed in a display area provided in the display unit, and when the imaging position is selected, an X-ray image of the selected imaging position is displayed in the foreground, and another selection An X-ray diagnostic apparatus characterized in that when a position is newly selected, an X-ray image of the newly selected imaging position is displayed in the foreground. A first step of irradiating a subject with X-rays generated by an X-ray tube;
A second step of detecting X-rays by an X-ray detector transmitted through the subject ;
A third step of moving the top plate on which the subject is placed in the body axis direction of the subject;
A fourth step of storing, in a storage device, an X-ray image obtained by dividing the region of interest of the subject into a plurality of overlapping imaging positions based on the detection result of the X-ray detector;
A fifth step of displaying the X-ray image on a display unit;
A sixth step in which a plurality of imaging positions of the X-ray image are displayed on the display unit;
A seventh step in which the X-ray image of the selected imaging position is displayed by selecting the displayed imaging position;
An eighth step in which an X-ray image for generating a long image from a plurality of captured X-ray images is specified;
A ninth step in which a long image is generated based on the identified X-ray image;
A data processing method for an X-ray diagnostic apparatus, comprising:

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