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BioMed Research International
Volume 2016, Article ID 6805979, 6 pages
http://dx.doi.org/10.1155/2016/6805979
Research Article

Volumetric Modulated Arc Therapy for Spine Radiosurgery: Superior Treatment Planning and Delivery Compared to Static Beam Intensity Modulated Radiotherapy

1Radiation Oncology unit, Oncology Institute, Sheba Medical Center, Ramat Gan, Israel
2Sheba Medical Center, Israel
3Stereotactic Radiosurgery Unit, Talpiot Medical Leadership Program, Department of Neurosurgery, Sheba Medical Center, Ramat Gan, Israel
4Spine Surgery Unit, Talpiot Medical Leadership Program, Department of Neurosurgery, Sheba Medical Center, Ramat Gan, Israel

Received 20 October 2015; Accepted 30 November 2015

Academic Editor: David J. Yang

Copyright © 2016 Leor Zach et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose. Spine stereotactic radiosurgery (SRS) delivers an accurate and efficient high radiation dose to vertebral metastases in 1–5 fractions. We aimed to compare volumetric modulated arc therapy (VMAT) to static beam intensity modulated radiotherapy (IMRT) for spine SRS. Methods and Materials. Ten spine lesions of previously treated SRS patients were planned retrospectively using both IMRT and VMAT with a prescribed dose of 16 Gy to 100% of the planning target volume (PTV). The plans were compared for conformity, homogeneity, treatment delivery time, and safety (spinal cord dose). Results. All evaluated parameters favored the VMAT plan over the IMRT plans. in the IMRT was significantly lower than in the VMAT plan (7.65 Gy/10.88 Gy, ), the Dice Similarity Coefficient (DSC) was found to be significantly better for the VMAT plans compared to the IMRT plans (0.77/0.58, resp., ), and an almost 50% reduction in the net treatment time was calculated for the VMAT compared to the IMRT plans (6.73 min/12.96 min, ). Conclusions. In our report, VMAT provides better conformity, homogeneity, and safety profile. The shorter treatment time is a major advantage and not only provides convenience to the painful patient but also contributes to the precision of this high dose radiation therapy.