Dynamic PET Scanning Table Adjustment for Tracer Tracking
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Solution Overview
Problem
Conventional dynamic PET scanning methods often omit key metabolism information due to limitations in the field of view of the PET system, leading to incomplete data acquisition during the dynamic imaging process.
Innovation Solution
The method involves performing PET scans on a target region, acquiring first PET-scan data, determining the single-event count distribution, and adjusting the scanning table position based on this data to dynamically correlate with the tracer's movement, ensuring comprehensive scanning regardless of the PET system's field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional dynamic imaging method performs imaging by examination table carrying patient to make periodic reciprocating motion at constant speed, then the imaging process can cover the whole body, but key metabolism information is easily omitted because the scanning is not related to the dynamics of the tracer itself
Solution Approach 1:
The scanning table speed is made dynamically adjustable based on real-time tracer distribution information. The system transitions from constant speed reciprocating motion to variable speed scanning that adapts to the dynamic characteristics of tracer metabolism, allowing the scanning parameters to change in response to the physiological processes being observed.
Solution Approach 2:
The system uses real-time PET scan data showing tracer distribution as feedback to control the scanning table speed. The acquired imaging data is continuously monitored, and the scanning parameters are adjusted based on this feedback to ensure key metabolism information is captured during the dynamic tracer distribution process.
2Measurement precision
If the field of view of the PET system cannot cover the whole body, then the device complexity is reduced, but accurate scanned data cannot be acquired during dynamic imaging process
Solution Approach 1:
The system uses dynamic scanning table adjustment to concentrate the limited field of view on the regions where tracer metabolism is occurring. By making the scanning table position and speed variable based on real-time tracer distribution, the system ensures that the fixed field of view captures the most metabolically active areas throughout the dynamic imaging process.
Solution Approach 2:
The system applies different scanning priorities to different body regions based on tracer distribution. Regions showing active tracer metabolism receive focused scanning attention with adjusted table positioning and speed, while less active regions are scanned less frequently or with lower priority, optimizing data quality within the limited field of view.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for more accurate data acquisition of the tracer's transmission and metabolism, preventing the omission of key metabolism information by dynamically adjusting the scanning table to match the tracer's position within the scanned object.
Implementation Method 1
The positrons emitted by the radionuclide combine with negatrons in tissues in the human body, and an annihilation radiation is generated, producing two y photons with equal energy and moving in opposite directions. The PET system may detect y photon pairs by means of a detection device thereof
Data Source
AI summary
Disclosed are a method and a device of dynamic PET scanning, and a computer apparatus. The method includes: performing a PET scan on a target region of a scanned object, and acquiring first PET-scan data including a single-event count received by a PET detector (S101); determining a single-event count distribution in the target region according to the first PET-scan data (S102); adjusting a position of a scanning table according to the single-event count distribution (S103); and performing a PET scan on the scanned object according to the adjusted position of the scanning table (S104). The method achieves a dynamic correlation between the position of the scanning table and changes of a tracer within the scanned object, so that more accurate scanned data can be obtained.