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- Title
Volumetric-modulated arc therapy with RapidArc<sup>®</sup>: An evaluation of treatment delivery efficiency.
- Authors
Amendola, Beatriz E.; Amendola, Marco; Perez, Naipy; Iglesias, Alejandro; Wu, Xiaodong
- Abstract
Abstract: Aim/background: To evaluate how the use of volumetric-modulated arc therapy (VMAT) with RapidArc® can improve treatment delivery efficiency based on the analysis of the beam-on times and monitor units (MU) needed to deliver therapy for multiple clinical applications in a large patient population. Materials and methods: A total of 898 treatment courses were delivered in 745 patients treated from October 2008 to March 2013 using RapidArc® treatment plans generated in Eclipse™ TPS. All patients were treated with curative or palliative intent using different techniques including conventional fractionation (83%) and radiosurgery or SBRT (17%), depending on the clinical indications. Treatment delivery was evaluated based on measured beam-on time and recorded MU values delivered on a Varian Trilogy™ linear accelerator. Results: For conventional fractionation treatments using RapidArc®, the delivery times ranged from 38s to 4min and 40s (average 2min and 6s). For radiosurgical treatments the delivery times ranged from 1min and 42s to 9min and 22s (average 4min and 4s). The average number of MU per Gy was 301 for the entire group, with 285 for the conventional group and 317 for the radiosurgical group. Conclusions: In this study with a large heterogeneous population, treatments using RapidArc® were delivered with substantially less beam-on time and fewer MUs than conventional fractionation. This was highly advantageous, increasing flexibility of the scheduling allowing treatment of radiosurgery patients during the regular daily work schedule. Additionally, reduction of leakage radiation dose was achieved.
- Publication
Reports of Practical Oncology & Radiotherapy, 2013, Vol 18, Issue 6, p383
- ISSN
1507-1367
- Publication type
Article
- DOI
10.1016/j.rpor.2013.07.005