Scan Quality and Entrance Skin Dose in Thoracic CT: A Comparison between Bismuth Breast Shield and Posteriorly Centered Partial CT Scans

<table>Illustration of technique utilized in posteriorly centered partial CT scan.  The tubes are switched on during 323° out of 360° per rotation.  The radiation intensity is then reduced along the remaining 37°         (red line) corresponding to the breast region.</table>

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Figure 1: Scan Quality and Entrance Skin Dose in Thoracic CT: A Comparison between Bismuth Breast Shield and Posteriorly Centered Partial CT Scans 