نتایج جستجو برای: pagat

تعداد نتایج: 50  

2017
Rahim Sabbaghizadeh Roslinda Shamsudin Najmeh Deyhimihaghighi Arman Sedghi

In the present study, the normoxic polyacrylamide gelatin and tetrakis hydroxy methyl phosphoniun chloride (PAGAT) polymer gel dosimeters were synthesized with and without the presence of silver (Ag) nanoparticles. The amount of Ag nanoparticles varied from 1 to 3 ml with concentration 3.14 g/l, thus forming two types of PAGAT polymer gel dosimeters before irradiating them with 6 to 25 Gy produ...

Asghar Mesbahi, Seyed-Salman Zakariaee

Introduction The purpose of the current study was to determine optical sensitivity of N-isopropyl acrylamide NIPAM and polyacrylamide gelatin and tetrakis hydroxymethyl phosphoniun chloride (PAGAT) polymer gels for different wavelength of visible light spectrum applied in optical computed tomography method. Materials and Methods NIPAM and PAGAT polymer gels with conventional formulations used f...

Journal: :Journal of Physics: Conference Series 2013

بختیار آزاد بخت محمدحسن زحمت کش کمال حداد

برای تعیین درصد دز عمقی باریکه‌های فوتونی با انرژی‌های مختلف در دزیمتر ژلی- پلی‌مری PAGAT و وابستگی آن به آهنگ دز با استفاده از تکنیک ام.آر.آی از مواد و ترکیبات شیمیایی با درصدهای وزنی زیر استفاده شده است: 4.5% بیس N-N' متیلن- بیس-آکریل‌آمید 4.5% آکریل‌آمید، 5 درصد ژلاتین، 5 میلی‌مول تتراکیس، 0.01 میلی‌مول هیدروکینون و 86 درصد آب دو بار تقطیر شده. برای تابش‌دهی ویال‌ها از فوتون‌های Co<su...

Journal: :iranian journal of medical physics 0
asghar mesbahi medical physics department, faculty of medicine, tabriz university of medical sciences, tabriz, iran. radiation oncology department, imam hospital, tabriz, iran

introduction the purpose of the current study was to determine optical sensitivity of n-isopropyl acrylamide nipam and polyacrylamide gelatin and tetrakis hydroxymethyl phosphoniun chloride (pagat) polymer gels for different wavelength of visible light spectrum applied in optical computed tomography method. materials and methods nipam and pagat polymer gels with conventional formulations used f...

Journal: :iranian journal of medical physics 0
bakhtiar azadbakht instructor, medical radiation engineering dept, faculty of engineering, borujerd islamic azad university, borujerd, iran. *, mohammad hassan zahmatkesh associate professor, shahid beheshti university, evin, tehran, iran kamal haddad associate professor, nuclear engineering dept, faculty of engineering, shiraz university, shiraz, iran. saeid bagheri m.sc. in medical physics, shahid beheshti university, tehran, iran

introduction: the pagat polymer gel dosimeter melts at 30 ˚c and even at room temperature during the summer, so it needs to be kept in a cool place such as a refrigerator. to increase the stability of the pagat gel, different amounts of agarose were added to the pagat gel composition and the pagata gel was manufactured. material and methods: the pagata gel vials were irradiated using a co-60 ma...

Journal: :iranian journal of radiation research 0
t. allahverdi pourfallah department of medical physics and biomedical engineering, tehran university of medical sciences, tehran, iran m. allahverdi department of medical physics and biomedical engineering, tehran university of medical sciences, tehran, iran n. riyahi alam department of medical physics and biomedical engineering, tehran university of medical sciences, tehran, iran m.r. ay research center for science and technology in medicine, tehran university of medical sciences, tehran, iran m.h. zahmatkesh novin medical radiation institute, tehran, iran

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 gamma ...

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