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A PMT gain adjustment method and device

A gain adjustment and energy maintenance technology, which is applied in the field of medical devices, can solve the problems of relying on the experience of the adjustment person, having great influence, and low efficiency, so as to achieve the effect of removing human influence

Active Publication Date: 2018-04-27
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional gain adjustment method is mainly based on the position scatter diagram of the crystal array used to detect the energy value on the detector module as the basis for judgment, and manually intervenes in the PMT gain to adjust the gain with a step-by-step approach method. This adjustment method is artificially subjective. The effect of the result is large, too dependent on the experience of the adjuster and the efficiency is not high

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  • A PMT gain adjustment method and device
  • A PMT gain adjustment method and device
  • A PMT gain adjustment method and device

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Embodiment 1

[0055] figure 1 A method flowchart of a PMT gain adjustment method provided by an embodiment of the present invention is applied to a PET device, the PET device has a detector module to be adjusted, and the method includes:

[0056] S101: Obtain a one-dimensional energy spectrogram to be adjusted, where the one-dimensional energy spectrogram to be adjusted is formed by the output data of the PMT to be adjusted corresponding to the detector module to be adjusted, and the PMT to be adjusted is the detection to be adjusted One of the multiple PMTs of the processor module.

[0057] For example, the one-dimensional energy spectrum according to the embodiment of the present invention can be as figure 2 As shown, figure 2 It is a schematic diagram of a one-dimensional energy spectrum provided by an embodiment of the present invention. The part in which the black shows a scattering shape may be the energy spectrum data formed by the energy collected by the detector module to be adjusted....

Embodiment 2

[0129] Figure 7 It is a device structure diagram of a PMT gain adjustment device provided by an embodiment of the present invention, which is applied to a PET device, the PET device has a detector module to be adjusted, and the device includes:

[0130] The acquiring unit 701 is configured to acquire a one-dimensional energy spectrogram to be adjusted, the one-dimensional energy spectrogram to be adjusted is formed by the output data of the PMT to be adjusted corresponding to the detector module to be adjusted, and the PMT to be adjusted is One PMT among the multiple PMTs of the detector module to be adjusted.

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Abstract

The embodiment of the invention discloses a PMT (photomultiplier tubes) gain regulating method and device. The method comprises: acquiring a one-dimensional energy spectrum to be regulated, and determining at least one energy peak point included in the one-dimensional energy spectrum; calculating coordinate averages of the at least one energy peak point in the one-dimensional energy spectrum to be regulated; calculating a gain regulation coefficient according to a positional relation between positions of the coordinate averages in the one-dimensional energy spectrum to be regulated and target line segments in the one-dimensional energy spectrum to be regulated, judging whether the gain regulation coefficient is greater than a preset threshold or not, and if yes, regulating gain of a PMT to be regulated, through the gain regulation coefficient. The gain regulation coefficient for regulating the gain of the PMT to be regulated can be determined in real time according to current output, thus eliminating the artificial influence in traditional regulation, improving gain regulation accuracy and improving regulation efficiency.

Description

Technical field [0001] The present invention relates to the field of medical equipment, in particular to a PMT gain adjustment method and device. Background technique [0002] Positron Emission Computed Tomography (English: Positron Emission Computed Tomography, abbreviation: PET) technology is a clinical imaging technology. The PET device detects the positron annihilation radiation generated during the decay process of radionuclides injected into the body to obtain images of the lesion. [0003] The PET device uses one or more detector modules to detect the energy value of annihilation radiation. Since the energy value detected by the detector is small, it needs to pass through multiple photomultiplier tubes (English: photomultiplier tube, abbreviation) independently corresponding to the detector modules : PMT) can be recognized by subsequent electronic circuits after being amplified. The PMT's ability to amplify the energy value detected by the detector module is regarded as th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03
CPCA61B6/037
Inventor 梁国栋吴国城李楠赵健付长青徐保伟
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD