PET SYSTEM ATTENUATION CORRECTION METHOD BASED ON FLOW MODEL

WIPO Patent Application WO/2023/134030

A1

Disclosed in the present invention is a PET system attenuation correction method based on a flow model. The used flow model is a completely invertible model, forward mapping and reverse mapping share a same parameter, and a structure is a consistency constraint; the model uses a spatial correlation of adjacent slices and uses a multi-slice input and single-slice output structure; the model is composed of a plurality of invertible blocks, each invertible block being composed of a lifting affine coupling layer and an invertible 1×1 convolution layer, and a plurality of small u-nets are used for learning transformation parameters of the lifting affine coupling layers. According to the present invention, additional CT or MR scanning is avoided, scanning costs are saved for a patient, and the harm of CT radiation to the patient is reduced; compared with a similar method, the present invention can obtain a PET image having higher quality after attenuation correction.

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WO/2022/235550	SYSTEMS AND METHODS INVOLVING ARTIFICIAL INTELLIGENCE AND CLOUD TECHNOLOGY FOR SERVER SOC
JP6901423	Information processing equipment, information processing terminals, and programs

LIU HUAFENG (CN)
WANG BO (CN)

PCT/CN2022/085009

July 20, 2023

April 02, 2022

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UNIV ZHEJIANG (CN)

G06N3/08; G06T11/00

CN113491529A	2021-10-12
CN110809782A	2020-02-18
CN111105472A	2020-05-05
CN112419173A	2021-02-26

HANGZHOU TIANQIN INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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