PET Sinogram Generation via Coordinate Extraction

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Solution Overview

Problem

Traditional PET data conversion methods increase the calculation amount of the system matrix, leading to inaccurate position information of response lines, resulting in low-quality and poorly defined PET images.

Innovation Solution

A method and terminal device that obtain and process first and second coordinates corresponding to the ends of a response line from a PET device, determine dimensional coordinates, and generate a sinogram to accurately represent the physical position of the response line, reducing the need for depth information processing and thereby reducing the calculation amount of the system matrix.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional PET data conversion method is used, then the system matrix calculation is performed, but the calculation amount increases and position information accuracy decreases

Engineering Contradiction:

Improveposition information accuracyVSAvoidcalculation amount

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent extracts and processes only the essential coordinate information (first coordinate and second coordinate corresponding to two ends of the response line) from the PET device, rather than processing the entire system matrix. This extraction approach reduces the calculation burden while maintaining position accuracy by focusing only on the critical geometric parameters needed for sinogram generation.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent performs preliminary coordinate determination and dimensional coordinate calculation before generating the sinogram. By pre-calculating the dimensional coordinates based on the first and second coordinates, the system prepares the necessary position information in advance, avoiding redundant calculations during the main image reconstruction process and thereby reducing overall computational load.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If traditional sinogram generation method is used, then the response line conversion is performed, but the sinogram accuracy decreases and PET image quality deteriorates

Engineering Contradiction:

Improvesinogram accuracyVSAvoidPET image quality

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent replaces the traditional mechanical system matrix calculation approach with a coordinate-based geometric transformation method. By substituting the complex matrix operations with direct coordinate calculations and dimensional coordinate transformations, the system achieves more accurate sinogram generation while simplifying the computational process, thereby improving both sinogram accuracy and resulting PET image quality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12153175B2Method and terminal device for processing Positron Emission Tomography data

Publication Date: 2024.11.26 SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI

AI summary

A method for processing positron emission tomography data is provided, this method includes: obtaining a first coordinate and a second coordinate respectively corresponding to two ends of a response line to be processed; determining corresponding dimensional coordinates of the response line to be processed in a sinogram based on the first coordinate and the second coordinate; and generating the sinogram corresponding to the response line to be processed based on the dimensional coordinates. According to this method, the amount of calculation of system matrix is reduced, the accuracy of position information of the generated response line is improved, and the accuracy of generated sinogram is improved accordingly.