Initial characterization of a dedicated breast PET/CT scanner during human imaging

Area of Science:

• Medical Imaging
• Nuclear Medicine
• Radiology

Background:

• Dedicated breast PET/CT scanners offer high-resolution functional and anatomical imaging.
• Current imaging techniques may have limitations in detecting certain breast pathologies.

Purpose of the Study:

• To characterize the performance of a newly constructed dedicated breast PET/CT scanner.
• To evaluate the scanner's ability to visualize suspected breast cancer lesions in patients.

Main Methods:

• Utilized a lutetium oxyorthosilicate-based dual-planar PET camera and a 768-slice cone-beam CT system.
• Images were reconstructed using 3D maximum a posteriori (PET) and Feldkamp (CT) algorithms, then fused.
• Phantom scans assessed registration accuracy and impact of PET on CT quality. Four women with suspicious mammograms were imaged.

Main Results:

• Achieved an average PET/CT registration error of 0.18 mm.
• PET electronics and activity did not significantly impact CT image quality.
• All biopsy-confirmed cancers, including ductal carcinoma in situ, were visualized. A correlation between larger breast volume and increased noise-equivalent counting rates was observed.

Conclusions:

• Dedicated breast PET/CT enables accurate 3D visualization of suspected breast lesions without compression.
• The technology demonstrates potential for enhanced breast cancer detection.