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US 2023/0056540 A1Published application
List mode image reconstruction method and nuclear medicine diagnostic apparatus
AssigneeShimadzu Corporation
InventorsTetsuya KOBAYASHI, Yoshihiro YAMADA
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Abstract
A list mode image reconstruction method includes a step of dividing list mode data into a plurality of subsets and a step of acquiring a subset balance coefficient based on the number of events in the plurality of subsets.
Claims11
A list mode image reconstruction method for reconstructing a radioactivity distribution image of a subject from list mode data collected by a nuclear medicine diagnostic apparatus by iterative calculation, the list mode image reconstruction method comprising the steps of:
- dividing the list mode data into a plurality of subsets;
- acquiring subset balance coefficients based on the number of events in the plurality of subsets;
- acquiring back projection values based on the list mode data;
- acquiring corrected back projection values by multiplying the back projection values by the subset balance coefficients;
- acquiring a back projection image based on the corrected back projection values, and
- updating the radioactivity distribution image based on the back projection image.
3 more elements
A nuclear medicine diagnostic apparatus comprising:
- a detection unit configured to detect radiation generated from a radiopharmaceutical agent in a subject;
- and
- an operation unit configured to reconstruct a radioactivity distribution image of the subject from list data as a detection result of radiation by the detection unit by iterative calculation,
- wherein the operation unit
- divides the list mode data into a plurality of subsets,
- acquires subset balance coefficients based on the number of events in the plurality of subsets,
- acquires back projection values based on the list mode data,
- acquires a corrected back projection value by multiplying the back projection values by the subset balance coefficients, and
- acquires a back projection image based on the corrected back projection values, and
- updates the radioactivity distribution image based on the back projection image.
7 more elements
Dependencies are inferred from the claim text.