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Apparatus and method for measuring photon time information

A technology of time information and photons, applied in the field of circuits, can solve problems such as the impact of measurement accuracy, and achieve the effect of correcting time measurement errors

Active Publication Date: 2017-05-10
WUHAN ZHONGPAI TECH CO LTD
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Problems solved by technology

For the above reasons, measurement accuracy may be affected when measuring the arrival time of high-energy photons using the improved photon measurement front-end circuit

Method used

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  • Apparatus and method for measuring photon time information

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Embodiment Construction

[0020] In the following description, numerous details are provided in order to provide a thorough understanding of the invention. However, it will be appreciated by those skilled in the art that the following description relates only to preferred embodiments of the invention and that the invention may be practiced without one or more of these details. In addition, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0021] As mentioned above, in order to avoid the problem in the conventional technology that the energy calculated by ADC sampling is affected by the start time of the electrical signal output by the photoelectric sensor, an improved photon measurement front-end circuit is currently proposed. figure 1 A schematic block diagram of an improved photonic measurement front-end circuit 100 according to an example is shown. It should be noted that the direction of the arrow shown in the drawings herein is t...

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Abstract

The invention provides an apparatus and method for measuring photon time information. The apparatus comprises a current detection circuit and a processing circuit. The current detection circuit is used for connection with a photoelectric sensor for detecting initial signals output by the photoelectric sensor and generating corresponding detection signals. The input end of the processing circuit is connected with the output end of the current detection circuit, and the processing circuit is used for determining arrival time of high-energy photons detected by the photoelectric sensor according to the detection signals, according to the detection signals, estimating a time drift amount and correcting the arrival time based on the time drift amount. According to the method and apparatus provided by the embodiments of the invention, the time drift amount is estimated, the arrival time is corrected based on the time drift amount, a time measurement error caused by a dark event can be corrected in such a way, and a high-precision time measurement result can be simply and conveniently obtained.

Description

technical field [0001] The present invention relates to the field of circuits, in particular to a device and method for measuring photon time information. Background technique [0002] The front-end detection device of a high-energy photon (X-ray, gamma photon, etc.) measurement system generally includes three parts: a scintillation crystal, a photodetector (or photoelectric sensor) and a photon measurement front-end circuit. The interaction of high-energy photons with the scintillation crystal produces a group of lower-energy visible photons. The photoelectric sensor converts the light signal carried by the visible photon group into an electrical signal. The main purpose of the photon measurement front-end circuit is to obtain the energy and arrival time of high-energy photons by measuring the electrical signal generated by the photoelectric sensor. For example, in positron emission tomography (PET) and single photon emission tomography (SPECT) systems, gamma photons inte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H03M1/52
CPCH03M1/52H04J3/0638
Inventor 赵指向龚政黄秋许剑锋
Owner WUHAN ZHONGPAI TECH CO LTD
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