title: Uncertainties involved in the estimation of mean glandular dose for women in the Norwegian Breast Cancer Screening Program (NBCSP).
abstract: The aim of this study was to reflect on the estimation of the mean glandular dose for women in Norway aged 50-69 y. Estimation of mean glandular dose (MGD) has been conducted by applying the method of Dance et al. (1990, 2000, 2009). Uncertainties in the thickness of approximately ±10 mm adds uncertainties in the MGD of approximately ±10 %, and uncertainty in the glandularity of ±0 % will lead to an uncertainty in the MGD of ±4 %. However, the inherent uncertainty in the air kerma, given by the European protocol on dosimetry, will add an uncertainty of 12 %. The total uncertainty in the MGD is estimated to be ∼20 %, taking into consideration uncertainties in compressed breast thickness (±10 %), the air kerma (12 %), change in HVL by -0.05 mm (-9.0 %), uncertainty in the s-factor of ±2.1 % and changing the glandularity to an age-dependent glandularity distribution (+8.4 %).
authors.affiliation: Department of Radiography and Dental Technology, Faculty of Health Sciences, Oslo and Akershus University College of Applied Sciences, PO Box 4, St. Olavs plass, Oslo NO-0130, Norway. ingrid-helen.ryste-hauge@hioa.no
authors.forename: I H R
authors.initials: IH
authors.lastname: Hauge
authors.forename: H M
authors.initials: HM
authors.lastname: Olerud
mesh_terms: D000368:Aged; D001940:Breast / Q000473:pathology* / Q000528:radiation effects*; D001943:Breast Neoplasms / Q000000981:diagnostic imaging* / Q000517:prevention & control; D055088:Early Detection of Cancer; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008327:Mammography; D008403:Mass Screening; D008875:Middle Aged; D009010:Monte Carlo Method; D009664:Norway; D011829:Radiation Dosage; D035501:Uncertainty