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29 May 2024 Exploring advanced 2D acquisitions in breast tomosynthesis: T-shaped and pentagon geometries
Priyash Singh, Chloe J. Choi, Bruno Barufaldi, Andrew D. A. Maidment, Raymond J. Acciavatti
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Proceedings Volume 13174, 17th International Workshop on Breast Imaging (IWBI 2024); 1317406 (2024) https://doi.org/10.1117/12.3027054
Event: 17th International Workshop on Breast Imaging (IWBI 2024), 2024, Chicago, IL, United States
Abstract
In this study, we investigate the performance of advanced 2D acquisition geometries--Pentagon and T-shaped--in digital breast tomosynthesis (DBT) and compare them against the conventional 1D geometry. Unlike the conventional approach, our proposed 2D geometries also incorporate anterior projections away from the chest wall. Implemented on the Next-Generation Tomosynthesis (NGT) prototype developed by X-ray Physics Lab (XPL), UPenn, we utilized various phantoms to compare three geometries: a Defrise slab phantom with alternating plastic slabs to study low-frequency modulation; a Checkerboard breast phantom (a 2D adaptation of the Defrise phantom design) to study the ability to reconstruct the fine features of the checkerboard squares; and the 360° Star-pattern phantom to assess aliasing and compute the Fourier-spectral distortion (FSD) metric that assesses spectral leakage and the contrast transfer function. We find that both Pentagon and T-shaped scans provide greater modulation amplitude of the Defrise phantom slabs and better resolve the squares of the Checkerboard phantom against the conventional scan. Notably, the Pentagon geometry exhibited a significant reduction in aliasing of spatial frequencies oriented in the right-left (RL) medio-lateral direction, which was corroborated by a near complete elimination of spectral leakage in the FSD plot. Conversely T-shaped scan redistributes the aliasing between both posteroanterior (PA) and RL directions thus maintaining non-inferiority against the conventional scan which is predominantly affected by PA aliasing. The results of this study underscore the potential of incorporating advanced 2D geometries in DBT systems, offering marked improvements in imaging performance over the conventional 1D approach.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Priyash Singh, Chloe J. Choi, Bruno Barufaldi, Andrew D. A. Maidment, and Raymond J. Acciavatti "Exploring advanced 2D acquisitions in breast tomosynthesis: T-shaped and pentagon geometries", Proc. SPIE 13174, 17th International Workshop on Breast Imaging (IWBI 2024), 1317406 (29 May 2024); https://doi.org/10.1117/12.3027054
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KEYWORDS
Aliasing
Contrast transfer function
Breast
Tomosynthesis
Digital breast tomosynthesis
Modulation
Distortion
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