Modification of Transmission Dose Algorithm for Irregularly Shaped Radiation Field and Tissue Deficit


Our transmission dose estimation algorithm for in vivo dosimetry was modified for use in partially blocked radiation fields and in cases with tissue deficit by using the beam data measured with flat solid phantom in various conditions of beam block and tissue deficit. The developed correction algorithm for irregularly shaped field could accurately reflect the effect of beam block, with error within ±1.0%. The correction algorithm for tissue deficit could accurately reflect the effect of tissue deficit with errors within ±1.0% in most situations and within ±3.0% in experimental settings with irregular contours mimicking breast cancer treatment set-up. Thus, developed algorithms could accurately estimate the transmission dose in most radiation treatment settings including irregularly shaped field and irregularly shaped body contour with tissue deficit.

Meeting Name

2nd ITRS International Symposium on Radiation Safety and Detection Technology


Nuclear Engineering and Radiation Science

Document Type

Article - Conference proceedings

Document Version


File Type





© 2003 Atomic Energy Society of Japan, All rights reserved.

Publication Date

01 Jan 2003

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