Pre-clinical evaluation and optimization of image quality for a Next Generation Tomosynthesis prototype

Area of Science:

• Medical Imaging
• Radiology
• Biomedical Engineering

Background:

• Digital breast tomosynthesis (DBT) is an advancement over mammography.
• Next-generation tomosynthesis (NGT) explores new scanning geometries for improved DBT.
• Previous work established physics-based metrics for NGT image quality assessment.

Purpose of the Study:

• To evaluate custom NGT acquisition geometries using mastectomy specimens.
• To validate findings from prior phantom experiments.
• To compare T- and K-shaped geometries against conventional DBT.

Main Methods:

• Developed a next-generation tomosynthesis (NGT) prototype.
• Implemented T- and K-shaped x-ray source motion paths.
• Calculated 3D noise power spectra (NPS) for image quality analysis.

Main Results:

• NGT geometries improved high-frequency performance and spatial resolution.
• Out-of-plane reconstruction artifacts were reduced.
• The T-geometry integrated benefits of narrow- and wide-angle tomosynthesis.

Conclusions:

• Custom NGT acquisition geometries enhance image reconstruction quality for mastectomy specimens.
• NGT offers superior performance compared to conventional DBT.
• The T-geometry shows promise for improved diagnostic accuracy in breast imaging.