Efficient one-pair experimental system for spatial resolution demonstration of prototype PET detectors.

Area of Science:

• Medical Imaging
• Nuclear Medicine
• Detector Physics

Background:

• Depth-of-Interaction (DOI)-positron emission tomography (PET) detectors offer improved imaging performance with a broad field of view.
• Evaluating spatial resolution, especially in peripheral regions, is crucial for demonstrating the advanced capabilities of DOI-PET detectors.
• Existing evaluation methods can be time-consuming, particularly for large-scale PET systems.

Purpose of the Study:

• To develop and assess an efficient experimental system for evaluating DOI-PET detector performance.
• To demonstrate the capability of the system in simulating various PET geometries and acquiring data efficiently.
• To validate the system's effectiveness in measuring uniform spatial resolution across the detector field of view.

Main Methods:

• Proposed a novel one-pair experimental system capable of simulating arbitrary ring diameters.
• Implemented an efficient data acquisition scheme by skipping unnecessary detector combinations based on point source position.
• Utilized the system to evaluate the X'tal cube PET detector in simulated PET geometries with different ring diameters.

Main Results:

• The developed system significantly reduced total measurement time, especially for large ring sizes relevant to brain and whole-body PET scanners.
• Uniform spatial resolution was achieved and demonstrated even in the peripheral regions of the detector.
• Measurements were obtained semi-automatically in a short timeframe, showcasing the system's efficiency.

Conclusions:

• The proposed one-pair experimental system provides an efficient method for evaluating DOI-PET detector performance.
• The system effectively demonstrates uniform spatial resolution, a key advantage of DOI-PET technology.
• This efficient evaluation approach accelerates the practical development and implementation of advanced DOI-PET systems.