The purpose of this study is to quantify the impact of sparse-view acquisition in short-scan trajectories, compared to 360-degrees full-scan acquisition, on image quality measures in dedicated cone-beam breast computed tomography (BCT). Projection data from 30 full-scan (360-degrees; 300 views) BCT exams with calcified lesions were selected from an existing clinical research database. Feldkamp-Davis-Kress (FDK) reconstruction of the full-scan data served as the reference. Projection data corresponding to two short-scan trajectories, 204 and 270-degrees, which correspond to the minimum and maximum angular range achievable in a cone-beam BCT system were selected. Projection data were retrospectively sampled to provide 225, 180, and 168 views for 270-degrees short-scan, and 170 views for 204-degrees short-scan. Short-scans with 180 and 168 views in 270-degrees used non-uniform angular sampling. A fast, iterative, total variation-regularized, statistical reconstruction technique (FI...

中文翻译：

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稀疏，短扫描，专用锥形束乳房计算机断层扫描：图像质量评估

这项研究的目的是量化与360度全扫描采集相比，短扫描轨迹中的稀疏视图采集对专用锥束乳房计算机断层扫描（BCT）图像质量测量的影响。从现有的临床研究数据库中选择了30次全扫描（360度； 300次观看）具有钙化病灶的BCT检查的投影数据。全扫描数据的Feldkamp-Davis-Kress（FDK）重建用作参考。选择对应于两个短扫描轨迹204和270度的投影数据，这两个轨迹对应于锥束BCT系统中可达到的最小和最大角度范围。回顾性地采样了投影数据，以提供针对270度短扫描的225、180和168视图以及针对204度短扫描的170的视图。在270度时具有180和168个视角的短扫描使用了非均匀角度采样。快速，迭代，总变化量已调整的统计重建技术（FI ...