J Korean Soc Ther Radiol Oncol.  2002 Jun;20(2):186-192.

Transmission Dose Estimation Algorithm for Tissue Deficit

• Yun HG
• Chie EK
• Huh SN
• Lee HK
• Woo HG
• Shin KC
• Ha SW

Abstract

PURPOSE: Measurement of transmission dose is useful for in vivo dosimetry. In this study, previous algorithm for estimation of transmission dose was modified for use in cases with tissue deficit.
MATERIALS AND METHODS
The beam data was measured with flat solid phantom in various conditions of tissue deficit. New algorithm for correction of transmission dose for tissue deficit was developed by physical reasoning. The algorithm was tested in experimental settings with irregular contours mimicking breast cancer patients using multiple sheets of solid phantoms.
RESULTS
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.
CONCLUSION
Developed algorithm could accurately reflect the effect of tissue deficit and irregularly shaped body contour on transmission dosimetry.

Keyword

In vivo dosimetry; Algorithm; Transmission dose; Tissue deficit; Irregular contour

MeSH Terms

Breast Neoplasms
Humans