A Technique for Stereotactic Radiosurgery Treatment Planning with Helical Tomotherapy

Journal Article · Fri Apr 01 00:00:00 EDT 2011 · Medical Dosimetry

DOI:https://doi.org/10.1016/j.meddos.2009.11.003· OSTI ID:21486884

Soisson, Emilie T ^[1]; Hoban, Peter W; Kammeyer, Thomas; Kapatoes, Jeffrey M ^[2]; Westerly, David C; Basavatia, Amar ^[3]

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1. Department of Human Oncology, University of Wisconsin School of Medicine and Public Health, Madison, WI (United States)
2. TomoTherapy Inc., Madison, WI (United States)
3. Department of Medical Physics, University of Wisconsin School of Medicine and Public Health, Madison, WI (United States)

The purpose of this study was to develop an efficient and effective planning technique for stereotactic radiosurgery using helical tomotherapy. Planning CTs and contours of 20 patients, previously treated in our clinic for brain metastases with linac-based radiosurgery using circular collimators, were used to develop a robust TomoTherapy planning technique. Plan calculation times as well as delivery times were recorded for all patients to allow for an efficiency evaluation. In addition, conformation and homogeneity indices were calculated as metrics to compare plan quality with that which is achieved with conventional radiosurgery delivery systems. A robust and efficient planning technique was identified to produce plans of radiosurgical quality using the TomoTherapy treatment planning system. Dose calculation did not exceed a few hours and resulting delivery times were less than 1 hour, which allows the process to fit into a single day radiosurgery workflow. Plan conformity compared favorably with published results for gamma knife radiosurgery. In addition, plan homogeneity was similar to linac-based approaches. The TomoTherapy planning software can be used to create plans of acceptable quality for stereotactic radiosurgery in a time that is appropriate for a radiosurgery workflow that requires that planning and delivery occur within 1 treatment day.

• OSTI ID: 21486884
• Journal Information: Medical Dosimetry, Journal Name: Medical Dosimetry Journal Issue: 1 Vol. 36; ISSN 0958-3947
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
62 RADIOLOGY AND NUCLEAR MEDICINE
ACCELERATORS
BODY
BRAIN
CENTRAL NERVOUS SYSTEM
CT-GUIDED RADIOTHERAPY
DOSES
LINEAR ACCELERATORS
MEDICINE
METASTASES
NERVOUS SYSTEM
NUCLEAR MEDICINE
ORGANS
PLANNING
RADIATION DOSES
RADIOLOGY
RADIOTHERAPY
SURGERY
THERAPY