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

Table 2

Summary of findings from anthromorphic phantom study comparing partial CT with breast shield.

Position	NanoDot Avg Anterior (mrad)	NanoDot Avg Posterior; (mrad)	Avg Effective Dose; (mAs)	CTDI; (mGy)	DLP; (mGy-cm)
Standard CT alone	686	602	88	5.99	318
Standard CT + breast shield	426	606	87	5.93	315
Partial CT	590	826	95	6.47	331

CTDI: CT dose index. DLP: Dose length product.