TOMOTHERAPY RADIOSURGERY FOR TRIGEMINAL NEURALGIA:A TECHNICAL PERSPECTIVE
We present the technical parameters used in this first application of TomoTherapy for the treatment of Trigeminal Neuralgia.A total of seven patients were treated between November 2007 and October 2011.Treatments were delivered to the trigeminal nerve root,and a 2 mm margin,in a single fraction of 30 or 35 Gy.TomoTherapy megavoltage CT imaging prior to treatment was carried out with a new 1 mm imaging collimator configuration,effectively doubling the best resolution previously available.Treatments were carried out using the 1 cm collimator yielding pencil beams of 0.64x1.0 cm.The pitch used varied from 0.05-0.10.The total beam-on time for the treatments varied from a high of 63.7 minutes for the earlier software versions to a low of 26.5 minutes for version 4.The minimum dose to 95% of the target ranged from 28.3-36.1 Gy while the mean target dose ranged 31.2-42.0 Gy.The mean dose to the brainstem was 1.01-1.55 Gy and the maximum dose to a volume of 0.02 cc ranged from 7.3-12.3 Gy.The results indicate that Tomo- Therapy can be configured for use in the treatment of TGN with acceptable dose to the target and to sensitive organs.
Trigeminal neuralgia radiosurgery TomoTherapy IGRT
T J Bichay C M Wilkinson C Chen
Radiation Oncology Department, Saint Marys Health Care, Grand Rapids, Michigan, USA;Wayne State Uni Radiation Oncology Department, Saint Marys Health Care, Grand Rapids, Michigan, USA
国际会议
World Congress on Medical Physics and Biomedical Engineering (2012年医学物理及生物医学工程国际会议(IFMBE))
北京
英文
1891-1894
2012-05-26（万方平台首次上网日期，不代表论文的发表时间）