Single-layer Compton camera system and imaging method

By introducing a local occlusion structure into a single-plane pixel-type gamma-ray detector and using the local count missing feature to determine the incident side, the problem of mirror artifacts in omnidirectional imaging of planar detectors is solved, and omnidirectional imaging and high-reliability positioning with a simplified structure are achieved.

CN121995426APending Publication Date: 2026-05-08UNIV OF SCI & TECH BEIJING
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Patent Information

Application Number
CN202610061250.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-16
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing Compton imaging systems using planar detectors lack effective solutions to address the uncertainty of the incident direction when imaging in all space, resulting in image artifacts that severely affect the accuracy of the imaging results.

Method used

A single-plane pixel-type gamma-ray detector combined with a local occlusion structure is used to determine the gamma-ray incident side by using the local count missing features formed by the occlusion structure, and Compton imaging reconstruction is performed within the corresponding hemispherical field of view to avoid mirror artifacts.

Benefits of technology

It achieves partitioned omnidirectional imaging without the need for depth information, simplifies the structure and facilitates miniaturization, effectively suppresses image artifacts, and improves the reliability of radiation source localization.

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Abstract

The invention discloses a single-layer Compton camera system and an imaging method, and relates to the technical field of nuclear radiation imaging. The system comprises a single-plane pixel type gamma ray detector used for collecting gamma ray interaction event data, including time information and energy information of each interaction and two-dimensional position information in a detector plane, and forming pixel counting distribution; the shielding structure is arranged on one side of the plane of the detector, is located in a local area of the detector and is used for enabling pixel counting distribution to generate a local counting missing feature when gamma rays are incident from one side where the shielding structure is located; and the judging and imaging module is used for judging a gamma ray incident side based on the local counting missing feature and executing Compton imaging reconstruction in a corresponding hemispherical view field range according to the judged incident side. According to the invention, partitioned omnidirectional imaging can be carried out on the radioactive source under the condition that a detector does not need to act on depth information, and meanwhile, generation of mirror image artifacts is avoided.
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