Helical tomotherapy for spine oligometastases from gastrointestinal malignancies
نویسندگان
چکیده
منابع مشابه
Helical tomotherapy for spine oligometastases from gastrointestinal malignancies
PURPOSE This study evaluated the treatment effectiveness and proper radiation dose of helical tomotherapy (HT) in spine oligometastases from gastrointestinal cancers. MATERIALS AND METHODS From 2006 to 2010, 20 gastrointestinal cancer patients were treated with HT for spine oligometastases (31 spine lesions). The gross tumor volume (GTV) was the tumor evident from magnetic resonance imaging i...
متن کاملOligometastases of Gastrointestinal Cancer Origin.
a Department of General, Thoracic, Vascular and Transplantation Surgery, University of Rostock, Rostock, Germany; b Department of General, Visceral and Transplantation Surgery, Heidelberg University Hospital, Heidelberg, Germany; c Department of General, Visceral and Transplant Surgery, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany; d University Cancer Center Le...
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Inherent to helical tomotherapy is a dose variation pattern that manifests as a "ripple" (peak-to-trough relative to the average). This ripple is the result of helical beam junctioning, completely unique to helical tomotherapy. Pitch is defined as in helical CT, the couch travel distance for a complete gantry rotation relative to the axial beam width at the axis of rotation. Without scattering ...
متن کاملRadiation characteristics of helical tomotherapy.
Helical tomotherapy is a dedicated intensity modulated radiation therapy (IMRT) system with on-board imaging capability (MVCT) and therefore differs from conventional treatment units. Different design goals resulted in some distinctive radiation field characteristics. The most significant differences in the design are the lack of flattening filter, increased shielding of the collimators, treatm...
متن کاملClinical helical tomotherapy commissioning dosimetry.
Helical tomotherapy presented many unique dosimetric challenges and solutions during the initial commissioning process, and some of them are presented. The dose calculation algorithm is convolution/superposition based. This requires that the energy fluence spectrum and magnitude be quantified. The methodology for doing so is described. Aspects of the energy fluence characterization that are uni...
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ژورنال
عنوان ژورنال: Radiation Oncology Journal
سال: 2011
ISSN: 2234-1900,2234-3156
DOI: 10.3857/roj.2011.29.4.219