نتایج جستجو برای: beam gantry

تعداد نتایج: 114050  

2015
K. Noda T. Furukawa Y. Hara T. Inaniwa Y. Iwata K. Katagiri N. Kanematsu A. Kitagawa K. Mizushima S. Mori T. Murakami M. Muramatsu M. Nakao A. Noda S. Sato T. Shirai E. Takada Y. Takei

The carbon-ion radiotherapy (RT) with HIMAC has been conducted since 1994, and the accumulated treatment number exceeded 9,000 in May 2014. During the last two decades, NIRS has developed both the accelerator and beam-delivery technologies related to the carbon-ion RT, which has brought several carbon-ion RT facilities in Japan. At present, NIRS has developed a carbon-ion rotating gantry with t...

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Journal: :Journal of Medical Imaging 2018

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2001
Mehrdad Sarfaraz Cedric Yu D. J. Chen Leon Der

We have constructed a computer controlled translational couch to administer total body irradiation reproducibly and safely. The system has replaced the previous stationary anterior-posterior technique in our institution and 30 plus patients have been treated with it so far. In this technique, patients comfortably lie on a couch in supine and prone positions and are transported slowly through a ...

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2006

ID: 5219 Title: A response surface-based approach to beam orientation optimization in IMRT Purpose: To include all noncoplanar beam directions in the beam orientation optimization (BOO) problem in intensity-modulated radiation therapy (IMRT) treatment planning, and to demonstrate that high-quality treatment plans can be obtained using fewer beams than are typically used in equi-spaced plans. Me...

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2012
Pejman Rowshanfarzad Mahsheed Sabet Daryl J. O'Connor Peter M. McCowan Boyd M.C. McCurdy Peter B. Greer

The increasing popularity of intensity-modulated arc therapy (IMAT) treatments requires specifically designed linac quality assurance (QA) programs. Gantry angle is one of the parameters that has a major effect on the outcome of IMAT treatments since dose reconstruction for patient-specific QA relies on the gantry angle; therefore, it is essential to ensure its accuracy for correct delivery of ...

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2003
Anders Brahme

A new approach is suggested for the optimization of stationary and more general moving beam type of irradiations. The method reverses the order of conventional treatment planning as it derives the optimum incident beam dose distributions from the desired dose distribution in the target volume. It is therefore deterministic and largely avoids the trial and error approach often applied in treatme...

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Journal: :Mathematical Problems in Engineering 2020

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Journal: :Radiotherapy and Oncology 2019

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Journal: :International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2019

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2013
James P. Steinman Shane L. Hopkins Iris Z. Wang

Traditionally, total skin electron patients remove all clothing for treatment. It is generally assumed that this is best for the treatment of superficial skin lesions out of concern clothing may significantly perturb dose. We investigate the dosimetric effect of patient gowns and determine the necessity of treating patients naked. Using GAFCHROMIC EBT2 film, dose to a cylindrical phantom was me...

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