title: Investigation of scatter fractions for estimating leakage dose in medical X-ray imaging facilities.
abstract: It is essential to make accurate estimates of the scatter of radiation from the human body when calculating the leakage dose in medical X-ray imaging facilities. The scatter fraction varies with the size and shape of the radiation field in a way that is not exactly proportional to the area of the field. Japanese law quotes values for the scatter fraction that are provided by the National Council on Radiation Protection and Measurements, but these data were obtained 30 years ago, using equipment that differed considerably from that employed nowadays. To date, no attempt has been made to confirm whether these data accurately describe current Japanese equipment. In the present study, we used an ion chamber dosimeter to measure scattered radiation fractions, and new scatter factor data are presented that resolve these problems.
authors.affiliation: Department of Radiology, Kanazawa University Hospital, Takaramachi, Kanazawa, Japan. knoto@med.kanazawa-u.ac.jp
authors.forename: Kimiya
authors.initials: K
authors.lastname: Noto
authors.forename: Kichirou
authors.initials: K
authors.lastname: Koshida
authors.forename: Hiroji
authors.initials: H
authors.lastname: Iida
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Ikuo
authors.initials: I
authors.lastname: Kobayashi
authors.forename: Chikako
authors.initials: C
authors.lastname: Kawabata
mesh_terms: D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011835:Radiation Protection; D011874:Radiometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D014965:X-Rays
references.citation: Radiology. 1972 Jul;104(1):161-9
references.pmid: 5033580
references.citation: Health Phys. 1989 Nov;57(5):817-8
references.pmid: 2592216
references.citation: J Vasc Interv Radiol. 1999 Nov-Dec;10(10):1343-50
references.pmid: 10584649
references.citation: Med Phys. 1994 Nov;21(11):1785-93
references.pmid: 7891641
references.citation: Health Phys. 1989 Oct;57(4):669-72
references.pmid: 2793486
references.citation: Med Phys. 1995 Aug;22(8):1235-45
references.pmid: 7476709
references.citation: Med Phys. 1996 Jul;23(7):1271-6
references.pmid: 8839423
references.citation: Health Phys. 1998 Mar;74(3):350-65
references.pmid: 9482601
references.citation: Pediatr Radiol. 2003 Oct;33(10):704-8
references.pmid: 12861430
references.citation: Nihon Hoshasen Gijutsu Gakkai Zasshi. 2004 Jan;60(1):118-25
references.pmid: 15041914
references.citation: Br J Radiol. 2004 Jan;77(913):28-38
references.pmid: 14988135