Evaluation of treatment plans using various treatment techniques for the radiotherapy of cutaneous Kaposi's sarcoma developed on the skin of feet

Jong Min Park, Il Han Kim, Sung Joon Ye, Kyubo Kim

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16 Scopus citations

Abstract

The purpose of this study was to investigate the plan qualities of various treatment modalities for the radiotherapy of cutaneous Kaposi's sarcoma developed on the skin of the foot. A total of six virtual targets were generated on the skin of the foot in CT images. Five types of treatment plans were generated using photon beams (PB), electron beams (EB), high-dose-rate (HDR) brachytherapy with a Freiburg flap applicator, intensity-modulated radiation therapy (IMRT), and volumetric-modulated arc therapy (VMAT) techniques. Plans for each of the six targets (single-target plans) and also for the combined target consisting of the six single targets combined (multitarget plans) were generated. Dose-volumetric analysis was performed for the targets and normal tissues. The averaged conformity index (CI) and homogeneity index (HI) values for each single target using PB, EB, HDR, IMRT, and VMAT techniques were 1.97, 2.39, 1.60, 4.60, and 0.80 and 1.05, 1.11, 1.52, 1.04, and 1.04, respectively. For the multitarget, the CI values were 3.99, 5.08, 1.38, 1.95, and 0.84, and the values of HI were 1.10, 1.36, 1.43, 1.06, and 1.04, respectively. The averaged mean doses to normal tissue were 2.5, 2.7, 3.6, 1.7, and 2.9 Gy for single-target plans, and 21.3, 14.6, 14.2, 14.3, and 13.0 Gy for the multitarget plans, respectively. The VMAT demonstrated dosimetric advantages and better treatment efficiency over other techniques for the radiotherapy of multifocal skin disease of the feet.

Original languageEnglish
Pages (from-to)173-187
Number of pages15
JournalJournal of Applied Clinical Medical Physics
Volume15
Issue number6
DOIs
StatePublished - 2014

Keywords

  • Cutaneous Kaposi's sarcoma
  • Freiburg flap applicator
  • High-dose-rate brachytherapy
  • Volumetric-modulated arc therapy

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