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Slip ring angle calibration method for intelligent MA transformation

A calibration method and technology of slip rings, which are applied in the fields of radiodiagnostic instruments, applications, medical science, etc., can solve the problem that the zero position of the slip ring and the actual zero position are accurately matched and difficult to control.

Inactive Publication Date: 2020-01-24
FMI MEDICAL SYST CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In the existing technology, the deviation can only be reduced as much as possible by adjusting the angle of the slip ring, but it is difficult to control the exact coincidence of the zero position of the slip ring and the actual zero position

Method used

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  • Slip ring angle calibration method for intelligent MA transformation
  • Slip ring angle calibration method for intelligent MA transformation
  • Slip ring angle calibration method for intelligent MA transformation

Examples

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Embodiment Construction

[0016] Below in conjunction with embodiment the present invention is described in further detail.

[0017] This embodiment proposes a slip ring angle calibration method for intelligent MA transformation, such as image 3 As shown, it includes slip ring encoder, FPGA, intelligent MA module, high voltage generator and bulb, where the output end of slip ring encoder is connected to the input end of FPGA, and the output end of FPGA is connected to the input end of intelligent MA module. The output end of the intelligent MA module is connected to the input end of the high-voltage generator, and the output end of the high-voltage generator is connected to the input end of the bulb, which is used to generate X-rays. The calibration method includes the following steps:

[0018] S01: Calculate the angle deviation value: Obtain the zero position of the slip ring through the slip ring encoder, and subtract the zero position of the slip ring from the actual zero position to form the angl...

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Abstract

The invention relates to the technical field of CT equipment, especially to a slip ring angle calibration method for intelligent MA transformation. The method includes the following steps: an angle deviation value is calculated; a calibration angle value of a slip ring is calculated; and an intelligent MA module performs transformation and output of an MA value according to the calibrated angle value. The invention has the following advantages: accurate intelligent MA transformation can be achieved without the alignment of the slip ring zero position and the actual zero position. Meanwhile, the method can achieve calibration for different CT equipment with different angular deviations.

Description

technical field [0001] The invention relates to the technical field of CT equipment, in particular to a slip ring angle calibration method for intelligent MA transformation. Background technique [0002] Intelligent MA (milliampere) transformation is a method for CT equipment to greatly reduce the radiation dose without affecting the image during the scanning process. Specifically, it means that the MA value is adjusted according to the actual situation as the position of the scanned object changes during the scanning process. , so that the MA value can be reduced where the MA value is required to be small, and the image effect will not be affected. Generally speaking, MA needs to be the minimum value at 0° / 180°, when the human body thickness is the smallest, and it is the maximum value at 90° and 270°, and the human body thickness is the largest at this time. [0003] The intelligent MA conversion is based on the slip ring angle to calculate the MA value. If there is a dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03A61B6/00
CPCA61B6/582A61B6/035A61B6/56
Inventor 朱炯方泽莉李敏陈修儒
Owner FMI MEDICAL SYST CO LTD
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