A method of SPECT arrangement for increasing the field of view of detection

By employing a detector arrangement method with circumferential uniform distribution and lateral displacement, combined with rotating gantry and image reconstruction techniques, the problem of reduced effective volume of the detection area and image quality after probe area reduction is solved, achieving cost-effective SPECT detection.

CN115153610BActive Publication Date: 2026-03-20SHANDONG MADIC TECH CO LTD
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Patent Information

Application Number
CN202210882779.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-07-26
Publication Date
2026-03-20
Estimated Expiration
2042-07-26

AI Technical Summary

Technical Problem

In existing SPECT equipment, the reduction in probe area leads to a significant decrease in the effective volume of the detection area, resulting in high costs and reduced image quality. There is a lack of effective cost control and detection area compensation methods.

Method used

A detector arrangement with uniform circumferential distribution is adopted, with the detector center shifted a certain distance to the side. The detector is rotated by a rotating frame, and combined with coincidence circuits and computer image reconstruction, it is ensured that the image quality is not significantly reduced.

Benefits of technology

While reducing costs, it maintains the effective volume of the detection area and image quality. The edge signal is weak, but the central image intensity is still reliable, achieving high-efficiency detection at a low cost.

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Abstract

A method for increasing the detection field of view of a SPECT arrangement, which is implemented by using a SPECT system (1) comprising one or more detection groups (11), each detection group comprising a detector (21), coincidence circuit (22), computer (23), the detector is arranged in a circumferentially uniform manner with the detection surface facing the detection area, first in a first position; the center of the detection surface of each detector is displaced laterally by a distance of not less than 3 cm or not less than 10% of the width of the detection surface of the detector to reach a second position; under the premise that the distance between the center of the detection surface of each detector and the center of the detection area is d, all detectors are rotated by a plurality of turns under the drive of the gantry, and the received detection signals are transmitted to the computer through the coincidence circuit, and the SPECT system controls all computers to complete image reconstruction. The detector is composed of a collimator layer (211), a scintillation crystal layer (212), a light guide layer (213), and a PMT array layer (214).
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