Mean glandular dose to patients from stereotactic breast biopsy procedures

• Published in: Physics in medicine & biology Vol. 63; no. 14; p. 145008
• Main Authors: Paixão, L, Chevalier, M, Hurtado-Romero, A E, Garayoa, J
• Format: Journal Article
• Language: English
• Published: England IOP Publishing 11.07.2018
• Subjects: mean glandular dose; Monte Carlo simulations; stereotactic breast biopsy
• ISSN: 0031-9155; 1361-6560; 1361-6560
• DOI: 10.1088/1361-6560/aacb06

The aim of this work is to study the radiation doses delivered to a group of patients that underwent a stereotactic breast biopsy (SBB) procedure. Mean glandular doses (MGD) were estimated from the air-kerma measured at the breast surface entrance multiplying by specific conversion coefficients (DgN) that were estimated using Monte Carlo simulations. DgN were calculated for the 0° and  ±15° projections used in SBB and for the particular beam quality. Data on 61 patients were collected showing that a typical SBB procedure is composed by ten images. MGD was on average (4  ±  2) mGy with (0.38  ±  0.06) mGy per image. The use of specific conversion coefficients instead of typical DgN for mammography/tomosynthesis yields to obtain MGD values for SBB that are around a 65% lower on average.