نتایج جستجو برای: 3d gel dosimetry

تعداد نتایج: 299187  

2009
A. Berg

Modern radiation techniques aim on improved 3-dimensional (3D) spatial selectivity of the dose application sparing dose from organs-at-risk (e.g. IMRT with micro-multileaf collimation, γ-knife-, Brachyand heavy-ion therapy). The corresponding 3D-dose distributions exhibit high dose gradients above 4 Gy/mm, which are difficult to be investigated using standard single-point dosimetric detectors ...

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...

2017
M. Keshtkar A. Takavar M. H. Zahmatkesh H. A. Nedaie A. Vaezzadeh M. Naderi

Background: Some ssues in human body are radiobiologically different from water and these inhomogeneity must be considered in dose calcula on in order to achieve an accurate dose delivery. Dose verifica on in complex radia on therapy techniques, such as intensity‐modulated radia on therapy (IMRT) calls for volumetric, ssue equivalent and energy independent dosimeter. The purpose of this study i...

Journal: :iranian journal of medical physics 0
hossein hasani m.sc. student in medical radiation engineering, science and research branch, islamic azad university, tehran, iran hasan nedaie assistant professor, radiotherapy and oncology dept., tehran university of medical sciences, cancer research center, center institute, tehran, iran mohammad hasan zahmatkesh associate professor, medical physics dept., novin medical radiation institute, tehran, iran mahmood allahverdi associate professor, medical physics dept., tehran university of medical sciences, tehran, iran saeid bagheri m.sc. of medical physics, novin medical radiation institute, shahid beheshti university, tehran, iran sajad mirzaie m.sc. student in medical radiation engineering, science and research branch, islamic azad university, tehran, iran

introduction: in radiotherapy, methods of treatment planning are becoming increasingly more complicated. this requires verification of the doses delivered to increasingly smaller and more precise regions. radiotherapy techniques are continuously employing smaller and smaller field sizes to deliver tighter radiation doses with higher therapeutic ratios, generating interest among researchers to p...

Journal: :iranian journal of radiation research 0
m. khadem-abolfazli physics department, mazandaran university, babolsar, iran m. mahdavi physics department, mazandaran university, babolsar, iran s.r.m. mahdavi medical physics department, iran university of medical sciences, tehran, iran gh. ataei para medical school, babol university of medical sciences, babol, iran

background: radiation-sensitive polymer gels are among the most promising three-dimensional dose verification tools and tissue-like developed to date. among the special features of this type of dosimeters, is be doped with other elements or chemicals which made them appropriate for investigating of dose enhancement with contrast agents, by high atomic number. material and methods: in this study...

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