학술논문
Comparison of dose distribution by means of bolus versus water bath phantom techniques in treatment of cutaneous sarcoma of an extremity.
Document Type
Academic Journal
Author
Janjan NA; Medical College of Wisconsin, Department of Radiation Oncology, Milwaukee 53226.; Zellmer DL; Lois P; Gillin MT; Hackbarth D
Source
Publisher: Elsevier Science Country of Publication: United States NLM ID: 8908862 Publication Model: Print Cited Medium: Print ISSN: 0958-3947 (Print) Linking ISSN: 18734022 NLM ISO Abbreviation: Med Dosim Subsets: MEDLINE
Subject
Language
English
ISSN
0958-3947
Abstract
Cutaneous involvement by Kaposi's sarcoma (KS) is frequently diffuse, requiring large field irradiation. Selective tissue compensation techniques, accomplished with either a 1.5 cm bolus cast or water bath phantom, are compared. Dosimetric determinations were performed using 6 MVX with bone heterogeneity corrections. Application of 1.5 cm bolus effectively eliminated dose buildup and provided tissue compensation equivalent to water bath phantom technique. Treatment of other cutaneous malignancies, such as angiosarcoma, requiring higher total doses, should be accompanied by dosimetric evaluation, because cutaneous and midline dose inhomogeneity may result in a significant total dose differential over the target volume. Application of 1.5 cm bolus improved accuracy in treatment positioning, eliminated concerns regarding infection control in AIDS-related KS, and provided dose homogeneity comparable to the more standard water bath phantom technique.