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Title: SU-F-P-58: Squamous Cell and Basal Cell Carcinoma of the Skin Treated with a Freiburg Flap Applicator

Abstract

Purpose: To treat squamous cell and basal cell carcinoma of the skin with the Freiburg flap applicator using a high dose rate modality of an Elekta Flexitron or MicroSelectron for radiation delivery by compensating the dose deviation resulting from the incomplete scatter environment. Methods: Patients were selected to have lesions greater than or equal to 2cm. A mask might be needed depending on special locations. The lesions on the eyelid and face presented in this research were, however, treated without a mask. Cutting the flap into a shape conformal to the target and attaching it to the mask were used in order to make the treatment reproducible. Patients were scanned with a Philips Big Bore Brilliant CT. A 1cm margin was added to the lesion. An Elekta Oncentra Brachy treatment planning system ver. 4.3 was used for treatment planning. 40 Gy in 10 or 8 fractions was prescribed to the 1cm depth. The Freiburg flap was aligned and verified by CT scanning prior to treatment. Results: Three patients with squamous cell and basal cell carcinoma of the skin were treated with the Freiburg flap applicator. Lesion sizes ranged from 2cm to 6 cm in a maximum dimension. With treatment planning,more » we made a dose correction for compensating the dose deviation resulting from the incomplete scatter environment of the flap applicators exposed to air. The flap was also covered by a 4cm bolus in order to obtain more back scattered radiation during treatment. Six month follow up showed a very good cosmetic result. Conclusion: The Freiburg flap brachytherapy offers a non-invasive skin cancer treatment with a high skin dose delivered to the tumor while a low dose sparing the surrounding health tissue. It is a promising alternative to skin cancer surgery or external beam radiation therapy.« less

Authors:
;  [1]; ;  [2]
  1. MedStar Health RadAmerica, Mercy Radiation Oncology, Baltimore, MD (United States)
  2. Mercy Medical Center Radiation Oncology, Baltimore, MD (United States)
Publication Date:
OSTI Identifier:
22626727
Resource Type:
Journal Article
Resource Relation:
Journal Name: Medical Physics; Journal Volume: 43; Journal Issue: 6; Other Information: (c) 2016 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 61 RADIATION PROTECTION AND DOSIMETRY; ANIMAL TISSUES; COMPUTERIZED TOMOGRAPHY; CONSUMER PRODUCTS; CORRECTIONS; DOSE RATES; EPITHELIOMAS; EXTERNAL BEAM RADIATION THERAPY; IMAGE PROCESSING; PATIENTS; PLANNING; RADIATION DOSES; SKIN; SURGERY

Citation Formats

Dou, K, Li, B, Jacobs, M, and Laser, B. SU-F-P-58: Squamous Cell and Basal Cell Carcinoma of the Skin Treated with a Freiburg Flap Applicator. United States: N. p., 2016. Web. doi:10.1118/1.4955766.
Dou, K, Li, B, Jacobs, M, & Laser, B. SU-F-P-58: Squamous Cell and Basal Cell Carcinoma of the Skin Treated with a Freiburg Flap Applicator. United States. doi:10.1118/1.4955766.
Dou, K, Li, B, Jacobs, M, and Laser, B. Wed . "SU-F-P-58: Squamous Cell and Basal Cell Carcinoma of the Skin Treated with a Freiburg Flap Applicator". United States. doi:10.1118/1.4955766.
@article{osti_22626727,
title = {SU-F-P-58: Squamous Cell and Basal Cell Carcinoma of the Skin Treated with a Freiburg Flap Applicator},
author = {Dou, K and Li, B and Jacobs, M and Laser, B},
abstractNote = {Purpose: To treat squamous cell and basal cell carcinoma of the skin with the Freiburg flap applicator using a high dose rate modality of an Elekta Flexitron or MicroSelectron for radiation delivery by compensating the dose deviation resulting from the incomplete scatter environment. Methods: Patients were selected to have lesions greater than or equal to 2cm. A mask might be needed depending on special locations. The lesions on the eyelid and face presented in this research were, however, treated without a mask. Cutting the flap into a shape conformal to the target and attaching it to the mask were used in order to make the treatment reproducible. Patients were scanned with a Philips Big Bore Brilliant CT. A 1cm margin was added to the lesion. An Elekta Oncentra Brachy treatment planning system ver. 4.3 was used for treatment planning. 40 Gy in 10 or 8 fractions was prescribed to the 1cm depth. The Freiburg flap was aligned and verified by CT scanning prior to treatment. Results: Three patients with squamous cell and basal cell carcinoma of the skin were treated with the Freiburg flap applicator. Lesion sizes ranged from 2cm to 6 cm in a maximum dimension. With treatment planning, we made a dose correction for compensating the dose deviation resulting from the incomplete scatter environment of the flap applicators exposed to air. The flap was also covered by a 4cm bolus in order to obtain more back scattered radiation during treatment. Six month follow up showed a very good cosmetic result. Conclusion: The Freiburg flap brachytherapy offers a non-invasive skin cancer treatment with a high skin dose delivered to the tumor while a low dose sparing the surrounding health tissue. It is a promising alternative to skin cancer surgery or external beam radiation therapy.},
doi = {10.1118/1.4955766},
journal = {Medical Physics},
number = 6,
volume = 43,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}