نتایج جستجو برای: volumetric radiation

تعداد نتایج: 260921  

2008
Joshua Napoli Sandy Stutsman James C. H. Chu Xing Gong Mark J. Rivard Thomas P. Ryan Gregg E. Favalora Andrew J. Woods Nicolas S. Holliman

We describe PerspectaRAD, the first tool for the review and modification of external-beam radiation therapy treatment plans with a volumetric three-dimensional display (Perspecta 1.9, Actuality Medical, Bedford, MA, USA) and a dedicated software application (PerspectaRAD, Actuality Medical). We summarize multi-institution retrospective studies that compare the system’s efficacy to the incumbent...

2003
Dominique Baillis Harifidy Randrianalisoa Laurent Pilon Raymond Viskanta

Radiation characteristics of fused quartz containing bubbles (10 % porosity) are determined using inverse method based on theoretical and experimental bi-directional transmittances and reflectances. The Discrete Ordinates Method is used to solve the RTE. The internal and external interfaces are assumed to be optically smooth. The importance of the choice of the interpolation law has been shown,...

Journal: :International Journal of Radiation Oncology*Biology*Physics 2014

2014
Saif Ali

Advancement in treatment delivery techniques in external beam radiation therapy has significantly improved the conformal radiation dose distributions to the tumor while reducing dose to the critical structures. Modern treatment techniques combined with sophisticated treatment planning systems have led to increase in the treatment planning studies in the recent years. In this article, we review ...

Journal: :International journal of radiation oncology, biology, physics 2016
Nima Nabavizadeh David A Elliott Yiyi Chen Aaron S Kusano Timur Mitin Charles R Thomas John M Holland

PURPOSE To survey image guided radiation therapy (IGRT) practice patterns, as well as IGRT's impact on clinical workflow and planning treatment volumes (PTVs). METHODS AND MATERIALS A sample of 5979 treatment site-specific surveys was e-mailed to the membership of the American Society for Radiation Oncology (ASTRO), with questions pertaining to IGRT modality/frequency, PTV expansions, method ...

2017

Submit Manuscript | http://medcraveonline.com Abbreviations: TCP: Tumor Control Probability; NTCP: Normal Tissue Control Probability; LKB: Lyman Kutcher Burman; IGRT: Image Guided Radiation Therapy; IMRT: Intensity Modulated Radiation Therapy; SIB-IMRT: Simultaneous Integrated BoostIMRT; VMAT: Volumetric Modulated Arc Therapy; DA: Double Arc; SA: Single Arc; HT: Helical Tomotherapy; IFP: Improv...

2013
B. Allgaier E. Schüle J. Würfel

Intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) are state-of-the-art irradiation techniques for the delivery of highly conformal radiation fields to the target volume. These techniques require complex treatment planning system (TPS) algorithms as well as sophisticated irradiation methods. As a result, the use of quality assurance tools for the verificati...

2018
Wen-zhao Sun Dan-dan Zhang Ying-lin Peng li Chen De-hua Kang Bin Wang Xiao-wu Deng

BACKGROUND Conventional phantom-based planar dosimetry (2D-PBD) quality assurance (QA) using gamma pass rate (GP (%)) is inadequate to reflect clinically relevant dose error in intensity-modulated radiation therapy (IMRT), owing to a lack of information regarding patient anatomy and volumetric dose distribution. This study aimed to evaluate the dose distribution accuracy of IMRT delivery for na...

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