Optimization of a PET scanner design for prostate lesion detection

Area of Science:

• Medical Imaging
• Nuclear Medicine
• Biomedical Engineering

Background:

• Advancements in prostate-specific tracers necessitate improved imaging technologies.
• Current PET imaging systems require optimization for prostate cancer detection.
• Low-cost, dedicated PET cameras offer potential for wider clinical adoption.

Purpose of the Study:

• To optimize the septa design of a low-cost PET camera for enhanced prostate tumor detection.
• To evaluate the impact of septa geometry on imaging performance for prostate cancer.
• To compare a novel septa design against traditional configurations.

Main Methods:

• Development of a low-cost PET camera utilizing curved detector banks for coincidence imaging.
• Optimization of septa design within the prostate PET camera.
• System performance evaluation using a prewhitening observer and background-known-statistically task.
• Assessment at a background activity level of 0.1 μCi/cc.

Main Results:

• The septa design critically influences lesion detection capabilities in prostate PET imaging.
• A novel septa design featuring 8-crystal spacing demonstrated superior performance.
• The novel design outperformed traditional 2D (interplane) and 3D (septa-less) septa configurations.

Conclusions:

• Optimized septa design is crucial for improving the sensitivity of low-cost prostate PET cameras.
• The novel 8-crystal spacing septa design represents a significant advancement for prostate tumor detection.
• This optimized camera design holds promise for more effective and accessible prostate cancer imaging.