Dosimetric effects of jaw tracking in step-and-shoot intensity-modulated radiation therapy
نویسندگان
چکیده
منابع مشابه
Dosimetric effects of jaw tracking in step‐and‐shoot intensity‐modulated radiation therapy
The purpose of this work was to determine the dosimetric benefit to normal tissues by tracking the multi-leaf collimator (MLC) apertures with the photon jaws in step-and-shoot intensity-modulated radiation therapy (IMRT) on the Varian 2100 platform. Radiation treatment plans for ten thoracic, three pediatric, and three head and neck cancer patients were converted to plans with the jaws tracking...
متن کاملDosimetric Effect of Jaw Tracking in Volumetric-Modulated Arc Therapy
The aim of this study was to investigate the potential of jaw tracking with the volumetric-modulated arc therapy (VMAT) to reduce the normal tissue dose. Plans of nasopharynx, lung, and prostate cancers (10 plans for each) were used to perform VMAT with and without jaw tracking. The dose reduction was evaluated in terms of organ doses and integral doses. Organ-dose reduction with jaw tracking w...
متن کاملDosimetric comparison between jaw tracking and static jaw techniques in intensity-modulated radiotherapy
PURPOSE To compare the dosimetric differences between jaw tracking technique (JTT) and static jaw technique (SJT) in dynamic intensity-modulated radiotherapy (d-IMRT) and assess the potential advantages of jaw tracking technique. METHODS Two techniques, jaw tracking and static jaw, were used respectively to develop the d-IMRT plans for 28 cancer patients with various lesion sites: head and ne...
متن کاملDosimetric verification of pre-treatment intensity modulated radiation therapy in the commissioning process
Background: Commissioning tests are recommended before implementing Intensity Modulated Radiation Therapy. This study evaluated five different plans of IMRT mocks for different modulation indices. Materials and Methods: IMRT tests were done in slab phantom for both 6MV and 15 MV photon energies using a 2D array ion chamber dosimeter. Results: The acceptance criteria were based on 3% /3mm. All t...
متن کاملCombining segment generation with direct step-and-shoot optimization in intensity-modulated radiation therapy.
A method for generating a sequence of intensity-modulated radiation therapy step-and-shoot plans with increasing number of segments is presented. The objectives are to generate high-quality plans with few, large and regular segments, and to make the planning process more intuitive. The proposed method combines segment generation with direct step-and-shoot optimization, where leaf positions and ...
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ژورنال
عنوان ژورنال: Journal of Applied Clinical Medical Physics
سال: 2012
ISSN: 1526-9914
DOI: 10.1120/jacmp.v13i2.3707