نتایج جستجو برای: gel dosimetry nipam

تعداد نتایج: 113003  

Journal: :iranian journal of medical physics 0
zeynab sanjabi m.sc. of radiation medicine dept., shahid beheshti university, tehran, iran. alireza kamali asl assistant professor, nuclear engineering dept., shahid beheshti university, tehran, iran mohammad hassan zahmatkesh associate professor, shahid beheshti university, evin, tehran, iran saeid bagheri m.sc. in medical physics, shahid beheshti university, tehran, iran

introduction: different dosimetric modalities (e.g., ionization chambers, semiconductors, tlds, radiographic films) often have some problems determining isodose curves and percentage depth doses in high dose gradient regions. research has been ongoing to develop portable high resolution dosimetry devices with accurate absolute dosimetry capabilities and easy data analysis. the ‘presage’ dosimet...

2017
Shuiqin Niu Ling-Kun Zhang Li Zhang Siyi Zhuang Xiuyu Zhan Wu-Ya Chen Shiwei Du Liang Yin Rong You Chu-Hua Li Yan-Qing Guan

Lewy bodies are considered as the main pathological characteristics of Parkinson's disease (PD). The major component of Lewy bodies is α-synuclein (α-syn). The use of gene therapy that targeting and effectively interfere with the expression of α-syn in neurons has received tremendous attention. In this study, we used magnetic Fe3O4 nanoparticles coated with oleic acid molecules as a nano-carrie...

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2014
G Gambarini M Carrara C Tenconi N Mantaut M Borroni D Cutajar M Petasecca I Fuduli M Lerch E Pignoli A Rosenfeld

MOSkin detectors were studied to perform real-time in vivo dose measurements in high dose rate prostate brachytherapy. Measurements were performed inside an urethral catheter in a gel phantom simulating a real prostate implant. Measured and expected doses were compared and the discrepancy was found to be within 8.9% and 3.8% for single MOSkin and dual-MOSkin configurations, respectively. Result...

2010
G. Gambarini M. Carrara A. Negri A. Scotti

Fricke-gel layer dosimeters (FGLD) and Fricke gel dosimetric catheters (FGDC) have been designed and tested with the aim of enquiring their suitability for HDR Ir brachytherapy source control and for in-vivo dose verification during treatment. Anisotropy function measurements have been carried out with FGLDs in which a thin plastic tube has been placed in for the Ir source insertion. FGDCs are ...

2016
Kurtis Dekker Jerry Battista Kevin Jordan

Introduction: Optical CT scanning of radiochromic gel dosimeters is a method for true 3D dosimetry, which is becoming increasingly needed as radiation therapy techniques become more advanced. Optical CT has developed from slow pencil beam laser scanners to fast cone-beam scanners using cameras. However, scattered light perturbs these broad-beam scanners, resulting in cupping artifacts and loss ...

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