High spatial resolution high-energy industrial CT linear array detector and manufacturing method thereof

By combining the staggered design of the scintillation crystal linear array with the reflective layer, the spatial resolution of industrial CT detectors has been improved, solving the problems of high manufacturing difficulty and high cost in existing technologies. This has improved the detector's resolution and signal-to-noise ratio, while reducing manufacturing difficulty and cost.

CN122131368APending Publication Date: 2026-06-02CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2026-03-24
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In order to improve the spatial resolution of existing industrial CT detectors, reducing the pixel size of photodiodes will increase the difficulty and cost of manufacturing processes, while using optical beam expanders or interpolation reconstruction algorithms will introduce artifacts, making it impossible to overcome the pixel limitation at the physical level.

Method used

By employing a scintillation crystal linear array design, X-rays are incident from the side. Through the misaligned scintillation crystal strips and reflective layer, combined with an optical isolation layer and photodiode array, directional output of scintillation light is achieved, thereby improving the spatial resolution and signal-to-noise ratio of the detector.

Benefits of technology

Without changing the photodiode array manufacturing process, the detector spatial resolution is doubled, the signal-to-noise ratio is improved, the manufacturing difficulty and cost are reduced, and the number of detector pixels is increased, resulting in a 2-fold increase in detection efficiency.

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Abstract

This invention relates to the field of CT detector technology, and particularly to a high spatial resolution, high-energy industrial CT linear array detector and its manufacturing method. The detector includes: a scintillation crystal linear array, a first photodiode array, and a second photodiode array; X-rays are incident from the side of the scintillation crystal linear array, and the scintillation light generated by the scintillation crystal linear array is emitted from the upper and second end faces to the first and second photodiode arrays, respectively. This invention proposes a "two-end readout + intermittent light emission" coupling scheme between the scintillation crystal array and photodiodes, achieving spatial resolution improvement through physical means, breaking through the resolution bottleneck of existing detectors, while ensuring high detection efficiency and high signal-to-noise ratio. The aim is to utilize existing standard pixel-sized photodiode arrays, through innovative structural design of the scintillation crystal linear array, to achieve a spatial resolution more than twice that of the physical pixel size.
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