JPH0454942A - X-ray ct scanner - Google Patents

Abstract

PURPOSE:To facilitate a partially altering work of scanning conditions by providing a display control means which performs a control to display the scanning conditions set simultaneously on a screen each time when scanning conditions are set for scanning. CONSTITUTION:A frame 1 is so arranged to let an X-ray tube 8 and a detector 9 turn integral about a testee P to be inspected. A system controller 2 sets scanning conditions for scanning in a programmable manner based on a data of the detector 9 obtained with a data collection section 4 during a scan photographing. Then, when the scanning conditions are set for the scanning with the system controller 2, a display control section 6 shows the scanning conditions set with the system controller 2 on a screen of a display section 7 while a changeable parameter is displayed thereby allowing the selection of the optimum scanning conditions. For example, when a scanning of the shortest scanning time is desired as the testee P to be inspected moves in variety, the scanning time can be altered to the least value, thereby setting a tube current to be supplied to the X-ray tube 8 automatically to the optimum value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an X&ICT scanner that performs tomography of a subject, and particularly relates to improvements in scanner control technology.

(Prior art) Conventionally, when performing tomography of a subject using this type of Xl191CT scanner, an operator manually sets scan conditions such as tube current, tube voltage, and scan time according to the area of the subject to be imaged. It was set by operation.

Furthermore, in the case of an X-ray scanner with a shift, the shift position was also set manually.

However, setting the scan conditions manually in this way takes a long time from the start of the scan to the end of the scan, so we first changed the settings of the scan conditions in a programmable manner based on the detection data during scano shooting. A possible X$*CT scanner has been proposed.

(Problem to be Solved by the Invention) However, even when scan conditions are automatically selected in this way, there may be cases where it is desired to partially change the scan conditions, but it is easy to partially change the scan conditions. It wasn't. Furthermore, although the above proposal includes displaying the actual scan conditions on the screen immediately before scanning, it is not easy to check the actual scan conditions in advance.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an X@CT scanner that can easily make changes when automatically selected scan conditions are partially changed. It is in.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an X-ray CT in which scan conditions during scanning can be programmably set based on detection data during scanography. The present invention is characterized in that the scanner is provided with display control means that controls displaying the simultaneously set scan conditions on the screen each time the scan conditions are set at the time of scanning.

(Function) With the configuration of the XIICT scanner according to the present invention, each time scan conditions are set during scanning, the set scan conditions are displayed on the screen at the same time, so you can check the scan conditions on the screen. , you can easily change some of the scanning conditions as needed.

(Embodiment) FIG. 1 is a block diagram schematically showing an X-ray CT scanner according to an embodiment of the present invention.

In order to scan the subject P on the mount 1, the X-ray CT scanner of this embodiment uses a system controller 2 as the control center of the entire system, including an exposure control section 3, a data collection section 4, a reconstruction section 5, and a display. It includes a control section 6 and a display section 7.

The pedestal 1 is configured such that the X-ray tube 8 and the detector 9 rotate integrally around the subject P. Scan conditions for this gantry 1 are set by the system controller 2, and the X-ray tube 8 is controlled by the exposure control section 3 according to the set scan conditions.

The data acquisition unit 4 inputs the X-ray transmission data obtained by the detector 9 for each channel, performs amplification, integration, sample hold, and A/P conversion, and outputs it to the rear reconstruction unit 5. It is something.

The reconstruction unit 5 reconstructs the C7 image by performing convolution and pack projection based on the projection data from all directions from the data collection unit 4, and provides the image display on the display unit 7 at the subsequent stage. There is.

The display control section 6 controls to display the simultaneously set scan conditions on the screen of the display section 7 every time the scan conditions for scanning are set in the system controller 2.

In a system configuration with various parts like this, when performing scanography, planning, and auto index scanning, the system controller 2 collects data from the detector 9 obtained from the data collection unit 4 during scanography. Based on
Scan conditions during scanning can be set programmably.

When the scan conditions for scanning are set by the system controller 2, the display control unit 6 displays the scan conditions set by the system controller 2 on the screen of the display unit 7 as shown in FIG. Display parameters that can be changed.

Therefore, it becomes possible to select more optimal scan conditions.

For example, when the subject P moves a lot and you want to scan with the shortest scan time, by changing the scan time to the shortest time, the tube current (mA) supplied to the X-ray tube 8 will automatically be set to the optimal value. It can be used like this: Of course, if the automatically set conditions are sufficient, all that is needed is confirmation, and the burden on the operator will not increase.

Further, in order to obtain a better C7 image only for a specific region, the tube current supplied to the X-ray tube 8 can be easily set higher than the automatic setting.

Furthermore, even in single scan and multi-scan, which is limited to the auto index scan that is planned and performed as described above, by displaying the scan conditions on the screen of the display unit 7 under the control of the display control unit 6,
Easy to check and change.

For example, in multi-scanning, scanning conditions were not displayed in the past, but the X-ray CT shown in Figure 1
When automatically setting the scanner, since the scan conditions may be set differently depending on the part of the subject P, it is preferable to display the scan conditions. Therefore, if it is necessary to change the scan condition settings, the scan condition settings can be changed based on the display.

Therefore, in this embodiment, the system controller 2
In this case, the control operation as shown in the flowchart of FIG. 3 is carried out.

When scano data is given (step 301),
Set standard scan conditions according to preset condition settings (presets such as scan time priority, etc.) (Step 30)
2). Each time the standard scan conditions are set, a control signal is sent to the display control unit 6 to control the display of the simultaneously set standard scan conditions on the screen of the display unit 7,
The standard scan conditions are displayed on the screen of the display unit 7 (step 303).

When a parameter is changed while the standard scan conditions are displayed (step 304 determines that the change has been made), or when another scan condition is changed and the scan conditions that you want to change are displayed (step 305 determines that the change has been made). determination, step 306), and these changes are determined in step 303.
will be changed and displayed. If there is no change in conditions (step 30)
4 and if no change is determined in step 305), scan control is executed (step 308).

Furthermore, in the X-ray CT scanner shown in FIG. 1, scan time priority, tube current priority, etc. can be set in advance or left to automatic judgment, but in the present invention, scan conditions can be set for each setting Since it is displayed, temporary changes can be easily made during scan planning or scanning.

Note that the changeable parameters on the screen are displayed, for example, by blanking. Furthermore, by clicking on the value with a pointing device such as a mouse, the conditions can be changed and other conditions can be automatically set. Furthermore, it is also possible to set other conditions to be fixed and change specific parameters. Furthermore, it is easy to enable simultaneous setting changes across multiple slices.

[Effects of the Invention] As explained above, according to the present invention, it is possible to easily confirm the scan conditions and change the settings, thereby increasing the safety for the subject during the scan.

[Brief explanation of the drawing]

FIG. 1 is a block diagram schematically showing an X-ray CT scanner according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a screen display according to an embodiment of the present invention, and FIG. 3 is a system diagram. 3 is a flowchart illustrating an example of a control operation of a controller. ] ... Frame 2 ... System controller 3 ... Exposure control section 4 ... Data collection section 5 ...
・Reconfiguration unit 6...Display control unit 7...Display unit 8...X-ray tube 9...Detector

Claims (1)

[Claims] (1) X-ray CT in which scan conditions can be set programmably based on detection data during scanography
An X-ray CT scanner, characterized in that the scanner is equipped with a display control means that controls displaying simultaneously set scan conditions on a screen each time scan conditions are set during scanning.