Molecular breast tomosynthesis with scanning focus multi-pinhole cameras

Area of Science:

• Medical Imaging
• Oncology
• Nuclear Medicine

Background:

• Planar molecular breast imaging (MBI) is increasingly used in diagnostic oncology.
• There is a need for 3D imaging capabilities to enhance lesion detection and characterization.
• Current MBI lacks depth resolution, limiting precise localization of abnormalities.

Purpose of the Study:

• To introduce and evaluate a novel molecular breast tomosynthesis (MBT) scanner concept.
• To assess the performance of multi-pinhole collimation for 3D breast imaging.
• To compare the diagnostic efficacy of MBT with planar MBI through simulations.

Main Methods:

• A prone patient positioning with light breast compression was designed.
• Integrated webcams facilitated scan volume designation.
• A novel scanning sequence involved translating multi-pinhole plates and gamma detectors.

Main Results:

• Simulations showed MBT significantly improved tumor-to-background contrast-to-noise ratio (CNR) over planar MBI for various lesion sizes.
• CNR improvements ranged from 12% to 241% depending on lesion size and scan focus.
• MBT achieved 4.0 mm depth resolution, surpassing planar MBI's lack of depth information.

Conclusions:

• Multi-pinhole MBT offers 3D localization of increased tracer uptake.
• MBT significantly enhances tumor-to-background CNR compared to planar MBI.
• These advancements promise improved lesion assessment, including position, extent, and shape.