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sipm temperature drift adaptive system and compensation method

An adaptive system and compensation method technology, applied in the fields of application, medical science, diagnosis, etc., can solve problems such as SIPM gain drift, environmental temperature changes are very sensitive, detection data deviates from real data, etc., to achieve automatic calculation, reduce impact, The effect of circuit structure optimization

Active Publication Date: 2022-05-24
FMI MEDICAL SYST CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

In order to obtain a good clinical image, it is necessary to ensure the stable operation of the PET detector, and the SIPM photomultiplier tube is the first-level and most original data acquisition of the entire detector. Its disadvantage is that it is very sensitive to changes in ambient temperature, which will cause SIPM The gain drifts, causing the detection data to deviate from the real data

Method used

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  • sipm temperature drift adaptive system and compensation method
  • sipm temperature drift adaptive system and compensation method
  • sipm temperature drift adaptive system and compensation method

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Embodiment Construction

[0030] The present invention is described in further detail below in conjunction with an embodiment.

[0031] The present embodiment proposes a SIPM temperature drift adaptive system, such as Figure 1 As shown, including the MCU, the MCU power-up connection has a host computer, a temperature read link and a bias read and write link, the MCU and the host computer communicate through the protocol, and the bias read and write link includes a bias write link and a bias read link.

[0032] as Figure 3 As shown, the bias write link includes a DAC chip electrically connected to the MCU, and the DAC chip has an LDO regulator chip connected to the power-on of each path (M0, M1: is the object of the final bias supply, i.e. the combination of the crystal and the carrier board in pet; e.g Figure 4 As shown, the bias read link comprises an analog switch, an analog switch for receiving a bias voltage written to the link write bias voltage, the analog switch is powered on connected to an analog-...

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Abstract

The invention relates to the technical field of medical imaging equipment, in particular to a SIPM temperature drift self-adaptive system and compensation method, including an MCU, the MCU is electrically connected to a host computer, a temperature reading link and a bias reading and writing link, and the bias reading The write link includes a bias write link and a bias read link. The functional relationship between temperature and bias voltage is established through a third-party medium to automatically calculate the optimal bias value at different temperatures to reduce the impact of temperature drift on The influence of the detector gain makes the whole system more stable; and the manual input of the bias voltage can be realized in the stage of the functional relationship test, and the automatic calculation, writing and reading of the bias voltage can be realized in the use stage.

Description

Technical field [0001] The present invention relates to the technical field of medical imaging equipment, in particular to a SIMM temperature drift adaptive system and compensation method. Background [0002] PET devices have been widely used in clinical diagnosis, and the core component detector of PET directly affects the image quality of PET. In order to obtain good clinical images, it is necessary to ensure the stable operation of the PET detector, and the SIPM photomultiplier tube is the first stage of the original data acquisition of the entire detector, the disadvantage of which is that it is very sensitive to changes in ambient temperature, and changes in ambient temperature will cause the SIPM gain to drift, resulting in the detection data deviating from the real data. Studies have shown that the temperature characteristics of SIPM are related to bias, and the bias size can compensate for the gain drift caused by temperature. [0003] Based on this, the case is thus rais...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03
CPCA61B6/037A61B6/4208A61B6/5211A61B6/52A61B6/5258A61B6/58
Inventor 陈汉生王武斌朱银东余李黄振强
Owner FMI MEDICAL SYST CO LTD
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