نتایج جستجو برای: pagat

تعداد نتایج: 50  

Mahmoud Allahverdi Mohammad Hasan Zahmatkesh Tayeb Allahverdi Pourfallah,

Introduction Polymer gel dosimeters offer a practical solution to 3D dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy. In this study, EGSnrc calculated and PAGAT polymer gel dosimeter measured dose profiles from single shot irradiation with 18 mm collimator of Gamma Knife in homogeneous and inhomogeneous phantoms were compared with eac...

M. Allahverdi, M.H. Zahmatkesh, M.R. Ay, N. Riyahi Alam, T. Allahverdi Pourfallah,

Background: Polymer gel dosimetry is still the only dosimetry method for direct measuring of threedimensional dose distributions. MRI Polymer gel dosimeters are tissue equivalent and can act as a phantom material. In this study the obtained isodose maps with PAGAT polymer gel dosimeter were compared to those calculated with EGSnrs for singleshot irradiations of 8 and 18 mm collimators of...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده مهندسی 1387

چکیده ندارد.

Journal: :iranian journal of medical physics 0
tayeb allahverdi pourfallah biochemistry and biophysics dept., faculty of medicine, mazandaran university of medical sciences, sari, iran

introduction polymer gel dosimeters offer a practical solution to 3d dose verification for conventional radiotherapy as well as intensity-modulated and stereotactic radiotherapy. in this study, egsnrc calculated and pagat polymer gel dosimeter measured dose profiles from single shot irradiation with 18 mm collimator of gamma knife in homogeneous and inhomogeneous phantoms were compared with eac...

2012
N. Gopishankar S. Vivekanandhan A. Jirasek S. S. Kale G. K. Rath Sanjay Thulkar R. K. Bisht

Gel dosimetry is a promising technique for the implementation of 3D dose verification within the radiation therapy clinic, since it is the only methodology which provides comprehensive 3D dose measurement of conformal treatments such as Intensity Modulated Radiation Therapy (IMRT), Stereotactic radiosurgery (SRS) and Stereotactic Radiotherapy (SRT), and volumetric arc therapies (VMAT). In polym...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Francisco J Ayala

T he wine grape, Vitis vinifera, is a member of the Vitaceae, a family of vigorous, climbing, woody plants that live in the Northern Hemisphere. The plants are illadapted to tropical climates, and thus never crossed the equator (except those transported by humans, which are cultivated in Argentina, Chile, Australia, South Africa, and other regions in the Southern Hemisphere). The genus Vitis co...

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