X-ray exposure control method and device and X-ray exposure system

An exposure control and equipment technology, applied in the field of X-ray exposure, can solve the problems of inability to convert X-ray dose, waste of X-ray exposure dose, etc.

Inactive Publication Date: 2012-12-05
赵建国
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, the ionization chamber often cannot completely convert the sensed X-ray amount into an output current signal, that is to say, the ionization chamber has an ionization chamber collection efficiency, therefore, the ionization chamber produces Useless signal of the subject image, thus wasting the X-ray exposure dose of the subject being photographed

Method used

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  • X-ray exposure control method and device and X-ray exposure system
  • X-ray exposure control method and device and X-ray exposure system
  • X-ray exposure control method and device and X-ray exposure system

Examples

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Effect test

no. 1 example

[0071] In step S505, the X-ray exposure control method according to the first embodiment of the present invention starts to operate.

[0072]In step S510, pre-exposure is performed on the subject, and the pre-exposure tube voltage, pre-exposure tube current and pre-exposure time are selected as described above.

[0073] In step S515, after the pre-exposure is completed, the X-ray exposure is stopped.

[0074] Then, in step S520, the pre-exposure image generated by the pre-exposure is obtained as described above.

[0075] In step S530, according to the pre-exposure image, the exposure time required for exposing the subject is calculated, while keeping the pre-exposure tube voltage and pre-exposure tube current unchanged. Specifically, a given area is selected in the obtained pre-exposure image, and the gray value of each pixel in the selected given area is averaged so as to obtain the average gray value of the given area, using the Divide the desired exposure image grayscale ...

no. 2 example

[0079] Similar to the first embodiment, in step S515, the X-ray exposure is stopped after the pre-exposure is completed, and in step S520, a pre-exposure image generated by the pre-exposure is obtained.

[0080] In step S530, according to the pre-exposure image, the exposure time and the exposure tube voltage required for exposing the subject are calculated, while keeping the pre-exposure tube current unchanged. Specifically, the required exposure tube voltage is determined according to the imaging size of the subject in the pre-exposure image, or according to the grayscale value of each pixel in a given area in the pre-exposure image. Also, the exposure time required to expose the subject is calculated as described in the first embodiment.

[0081] Next, in step S540, the subject is re-exposed using the exposure tube voltage, the exposure tube current equal to the pre-exposure tube current, and the exposure time.

no. 3 example

[0083] Similar to the first and second embodiments, in step S515, the X-ray exposure is stopped after the pre-exposure is completed, and in step S520, a pre-exposure image generated by the pre-exposure is obtained.

[0084] In step S530, according to the pre-exposure image, the exposure time, exposure tube current and exposure tube voltage required for exposing the subject are calculated. Specifically, the required exposure tube voltage is determined according to the imaging size of the subject in the pre-exposure image, or according to the grayscale value of each pixel in a given area in the pre-exposure image. In addition, the gray value of each pixel in a given region of the pre-exposure image is averaged to obtain the average gray value of the given region, and the required gray value of the exposed image is divided by the given region In order to obtain a dosing factor, the product of the pre-exposure time and the pre-exposure tube current is multiplied by the dosing fact...

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Abstract

The invention provides an X-ray exposure system, and X-ray exposure control device and method for the X-ray exposure system. The X-ray exposure control method includes: pre-exposing a shot target for a first time under the given tube voltage and given tube current to obtain pre-exposed image formed by pre-exposure; calculating exposure parameters, namely exposure tube voltage, exposure tube current and exposure time, required to expose the shot target according to the pre-exposed image, and multiplying the exposure tube current by the exposure time to obtain a product which is exposure dose, wherein the exposure tube voltage is equal to or unequal to the given tube voltage, and the exposure tube current is equal to or unequal to the given tube current. The X-ray exposure system can automatically control the exposure parameters in X-ray exposure without using an ionization chamber, and a satisfactory X-ray exposed image is obtained with the X-ray exposure dose as little as possible.

Description

technical field [0001] The present invention relates to the field of X-ray exposure, and in particular to an X-ray exposure system, an X-ray exposure control device and an X-ray exposure control method used in the X-ray exposure system for automatically controlling X-ray exposure. Background technique [0002] In existing X-ray exposure systems, whether analog (film) or digital X-ray exposure systems, manual or automatic X-ray exposure dose control can be used. Manual X-ray exposure control is typically based on an empirical table of known X-ray exposure parameters, and the operator relies on experience to obtain X-ray exposure parameters for different objects, different shooting parts, or different shooting organs, etc. Tube voltage and exposure dose, but it is difficult to make the X-ray exposure image reach the desired exposure. These existing x-ray exposure techniques and exposure control implementations are very subjective and cannot strictly personalize x-ray exposure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B7/00G03B42/02
Inventor 赵建国
Owner 赵建国
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