نتایج جستجو برای: radiotherapy intensity modulated

تعداد نتایج: 290062  

Journal: :International Journal of Radiation Oncology*Biology*Physics 2012

2005
Piotr Zygmanski Fred Hacker Scott Friesen Robin Rodenbush Hsiao‐Ming Lu Lee Chin

The analysis of dynamic multileaf collimator (MLC) positions for the delivered intensity-modulated radiotherapy (IMRT) plans is crucial in that it may capture dose delivery problems otherwise difficult to observe and quantify in the conventional dosimetric measurements with film or with an ionization chamber. In some IMRT systems, delivery of IMRT fields starts with a maximum MLC opening (rough...

2010
Taoran Li Xiaofeng Zhu Danthai Thongphiew W. Robert Lee Zeljko Vujaskovic Qiuwen Wu Fang-Fang Yin Q. Jackie Wu

The purpose of this paper is to evaluate the feasibility and clinical dosimetric benefit of an on-line, that is, with the patient in the treatment position, Adaptive Radiation Therapy (ART) system for prostate cancer treatment based on daily cone-beam CT imaging and fast volumetric reoptimization of treatment plans. A fast intensity-modulated radiotherapy (IMRT) plan reoptimization algorithm is...

2011
Jidi Sun Theam Yong Chew Juergen Meyer

BACKGROUND 2-step intensity modulated arc therapy (IMAT) is a simplified IMAT technique which delivers the treatment over typically two continuous gantry rotations. The aim of this work was to implement the technique into a computerized treatment planning system and to develop an approach to optimize the segment weights and widths. METHODS 2-step IMAT was implemented into the Prism treatment ...

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