New Equation to Estimate Patient Surface Absorbed Dose from Effective X-ray Energy

• MATSUMOTO MITSUHIRO

  Department of Radiology, Osaka University Hospital

• INOUE SHINICHI

  Department of Radiology, Osaka University Hospital

• MATSUZAWA RIE

  Hitachi Zosen Nankoh Clinic

Bibliographic Information

Other Title

• 実効エネルギーに基づく患者表面吸収線量推定式

Abstract

We propose a new equation to estimate patient surface absorbed dose from effective x-ray energy. The equation is represented as follows : D(skin absorbed dose)=Ds×mAs×FSF×F×DST, where Ds indicates basic exposure, mAs is additional x-ray tube current and exposure time, FSF is a factor used to count additional scattered exposure, F is a conversion coefficient to convert from exposure to absorbed dose, and DST is distance compensation. For Ds, the value of the exposure dose without aluminum in the half-value layer(HVL)measurement for 1 mAs was used(C/kg/mAs). FSF is a ratio of exposure containing scattered radiation that corresponds to field size to basic exposure. F was calculated using reported values of attenuation coefficients in the data book. Then approximation function curves for Ds, FSF, and F were success-fully created, with an excellent correlation coefficient(R^2=0.997), using effective x-ray energy as a variable.

Journal

• Japanese Journal of Radiological Technology

  Japanese Journal of Radiological Technology 57 (12), 1519-1526, 2001

  Japanese Society of Radiological Technology

Keywords

• Medical X-ray exposure
• Absorbed dose estimation
• Effective energy

Details

• CRID: 1390282681367045248
• NII Article ID: 110003439533
• NII Book ID: AN00197784
• DOI: 10.6009/jjrt.kj00001357708
• ISSN: 18814883
• ISSN: 03694305
• ISSN: http://id.crossref.org/issn/03694305
• Web Site: https://www.jstage.jst.go.jp/article/jjrt/57/12/57_KJ00001357708/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2002162955
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed