In vivo skin dose measurement in breast conformal radiotherapy

Soleymanifard, S. and Aledavood, S. A. and Noghreiyan, A. V. and Ghorbani, M. and Jamali, F. and Davenport, D. (2016) In vivo skin dose measurement in breast conformal radiotherapy. Wspolczesna Onkologia, 20 (2). pp. 137-140.

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Abstract

Aim of the study: Accurate skin dose assessment is necessary during breast radiotherapy to assure that the skin dose is below the tolerance level and is sufficient to prevent tumour recurrence. The aim of the current study is to measure the skin dose and to evaluate the geometrical/anatomical parameters that affect it. Material and methods: Forty patients were simulated by TIGRT treatment planning system and treated with two tangential fields of 6 MV photon beam. Wedge filters were used to homogenise dose distribution for 11 pa-tients. Skin dose was measured by thermoluminescent dosimeters (TLD-100) and the effects of beam incident angle, thickness of irradiated region, and beam entry separation on the skin dose were analysed. Results: Average skin dose in treatment course of 50 Gy to the clinical target volume (CTV) was 36.65 Gy. The corresponding dose values for patients who were treated with and without wedge filter were 35.65 and 37.20 Gy, respectively. It was determined that the beam angle affected the average skin dose while the thickness of the irradiated region and the beam entry separation did not affect dose. Since the skin dose measured in this study was lower than the amount required to prevent tumour recurrence, application of bolus material in part of the treatment course is suggested for post-mastectomy advanced breast radiotherapy. It is more important when wedge filters are applied to homogenize dose distribution.

Item Type: Article
Additional Information: Cited By :4 Export Date: 16 February 2020 Correspondence Address: Aledavood, S.A.; Department of Radiation Oncology, Faculty of Medicine, Mashhad University of Medical Sciences, Kouhsangi Street, Iran; email: aledavooda@mums.ac.ir
Uncontrolled Keywords: Breast cancer Conformal radiotherapy In vivo dosimetry Skin dose Article beam entry separation beam incident angle cancer radiotherapy chest wall thickness clinical article controlled study gamma radiation human in vivo study outcome assessment photon therapy radiation dose radiation dose distribution radiation measurement radiological parameters skin dose measurement thermoluminescence dosimeter thickness treatment response tumor recurrence wedge filter
Subjects: WN Radiology . Diagnostic Imaging
WQ Obstetrics
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib4 lib4
Date Deposited: 26 Feb 2020 07:05
Last Modified: 26 Feb 2020 07:05
URI: http://eprints.mums.ac.ir/id/eprint/13220

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