Null functions in three-dimensional imaging of alpha and beta particles.

Area of Science:

• Medical Imaging
• Particle Physics
• Nuclear Science

Background:

• Null functions represent intrinsic limitations in digital imaging systems, arising from the conversion of continuous objects to discrete data.
• Particle-processing (PP) detectors offer a potential solution by measuring continuous data, including particle attributes like position and momentum.
• Charged-Particle Emission Tomography (CPET) utilizes PP detectors for reconstructing radioisotope distributions.

Purpose of the Study:

• To investigate the impact of particle-processing detectors on reducing null functions in Charged-Particle Emission Tomography (CPET).
• To determine the number of measured particle attributes required to significantly minimize null functions for alpha and beta particle imaging.

Main Methods:

• Employed Charged-Particle Emission Tomography (CPET) with particle-processing (PP) detectors.
• Collected and analyzed data from alpha and beta particle emissions.
• Quantified the reduction of null functions based on the number of measured particle attributes (position and momentum components).

Main Results:

• Null functions were significantly reduced in CPET when using PP detectors.
• For alpha particles, a reduction was observed when measuring three or more attributes.
• For beta particles, measuring five attributes led to a significant reduction in null functions.

Conclusions:

• Particle-processing detectors can substantially mitigate null functions in CPET.
• The number of measured particle attributes is critical for minimizing imaging system limitations.
• This advancement holds promise for improving the accuracy of radioisotope distribution reconstruction in medical imaging.