University of Massachusetts Medical School Faculty Publications

UMMS Affiliation

Department of Surgery; Department of Radiation Oncology; Department of Medicine

Date

2-22-2013

Document Type

Article

Disciplines

Oncology | Radiology | Surgery

Abstract

Purpose: Chest wall pain and discomfort has been recognized as a significant late effect of radiation therapy in historical and modern treatment models. Stereotactic Body Radiotherapy (SBRT) is becoming an important treatment tool in oncology care for patients with intrathoracic lesions. For lesions in close approximation to the chest wall with motion management, SBRT techniques can deliver high dose to the chest wall. As an unintended target of consequence, there is possibility of imposing significant chest wall pain and discomfort as a late effect of therapy. The purpose of this paper is to evaluate the potential role of Volume Modulated Arc Therapy (VMAT) technologies in decreasing chest wall dose in SBRT treatment of pulmonary lesions in close approximation to the chest wall.Materials and

Methods: Ten patients with pulmonary lesions of various sizes and tomography in close approximation to the chest wall were selected for retrospective review. All volumes including tumor target, chest wall, ribs, and lung were contoured with maximal intensity projection maps and four-dimensional computer tomography planning. Radiation therapy planning consisted of static techniques including Intensity Modulated Radiation Therapy compared to VMAT therapy to a dose of 60 Gy in 12 Gy fraction dose. Dose volume histogram to rib, chest wall, and lung were compared between plans with statistical analysis.

Results: In all patients, dose and volume were improved to ribs and chest wall using VMAT technologies compared to static field techniques. On average, volume receiving 30 Gy to the chest wall was improved by 74%; the ribs by 60%. In only one patient did the VMAT treatment technique increase pulmonary volume receiving 20 Gy (V20).

Conclusions: VMAT technology has potential of limiting radiation dose to sensitive chest wall regions in patients with lesions in close approximation to this structure. This would also have potential value to lesions treated with SBRT in other body regions where targets abut critical structures.

Rights and Permissions

Citation: Ding L, Lo YC, Kadish S, Goff D, Pieters RS, Graeber G, Uy K, Quadri S, Moser R, Martin K, Day J, Fitzgerald TJ. Volume Modulated Arc Therapy (VMAT) for pulmonary Stereotactic Body Radiotherapy (SBRT) in patients with lesions in close approximation to the chest wall. Front Oncol. 2013;3:12. doi:10.3389/fonc.2013.00012. Link to article on publisher's site

Comments

Copyright 2013 Ding, Lo, Kadish, Goff, Pieters, Graeber, Uy, Quadri, Moser, Martin, Day and FitzGerald. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.

Related Resources

Link to Article in PubMed

Keywords

Volume Modulated Arc Therapy, Chest wall, Intrathoracic lesions, Radiation therapy, Stereotactic body radiotherapy

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