Results 71 to 80 of about 12,318 (173)

Dosimetric Verification around High-density Materials for External Beam Radiotherapy

Japanese Journal of Radiological Technology, 2016
It is generally known that the dose distribution around the high-density materials is not accurate with commercially available radiation treatment planning systems (RTPS). Recently, Acuros XB (AXB) has been clinically available for dose calculation algorithm.
Makoto, Sasaki, Manabu, Nakata, Mitsuhiro, Nakamura, Yoshitomo, Ishihara, Takahiro, Fujimoto, Yusuke, Tsuruta, Shinsuke, Yano, Kyouji, Higashimura   +7 more
openaire   +3 more sources

Single institution implementation of permanent 131Cs interstitial brachytherapy for previously irradiated patients with resectable recurrent head and neck carcinoma [PDF]

, 2019
Purpose: Permanent interstitial brachytherapy is an appealing treatment modality for patients with locoregional recurrent, resectable head and neck carcinoma (HNC), having previously received radiation.
Bar-Ad, Voichita, Cognetti, David, Curry, Joseph, Doyle, Laura, Harrison, Amy, Hubley, Emily, Johnson, Jennifer, Keller, James, Luginbuhl, Adam, Peng, Cheng, To, David   +10 more
core   +1 more source

Geant 4 Monte Carlo simulation for I-125 brachytherapy

Nuclear Engineering and Technology
This study aims to validate the dosimetric characteristics of Low Dose Rate (LDR) I-125 source Geant4-based Monte Carlo code. According to the recommendation of the American Association of Physicists in Medicine (AAPM) task group report (TG-43), the ...
Jie Liu, M.E. Medhat, A.M.M. Elsayed
doaj   +1 more source

Radiation dose verification using real tissue phantom in modern radiotherapy techniques

Journal of Medical Physics, 2014
In vitro dosimetric verification prior to patient treatment has a key role in accurate and precision radiotherapy treatment delivery. Most of commercially available dosimetric phantoms have almost homogeneous density throughout their volume, while real ...
Om Prakash Gurjar, S P Mishra, Virendra Bhandari, Pankaj Pathak, Prapti Patel, Garima Shrivastav   +5 more
doaj   +1 more source

Effect of Statistical Fluctuation in Monte Carlo Based Photon Beam Dose Calculation on Gamma Index Evaluation

, 2013
The gamma-index test has been commonly adopted to quantify the degree of agreement between a reference dose distribution and an evaluation dose distribution.
Bakai A, Calvo O I, Chen M, Gu X, Gu X, Jelen U, Jia X, Jia X, Jiang S B, Low D A, Sempau J, Steve B Jiang, Stock M, Wang H, Xun Jia, Yan Jiang Graves   +15 more
core   +1 more source

Dosimetric characteristics of a new linear accelerator under gated operation. [PDF]

, 2006
Respiratory gated radiotherapy may allow reduction of the treatment margins, thus sparing healthy tissue and/or allowing dose escalation to the tumor. However, current commissioning and quality assurance of linear accelerators do not include evaluation ...
Kriminski, Sergey, Li, Alex N, Solberg, Timothy D   +2 more
core   +1 more source

Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry

Journal of Medical Signals and Sensors, 2017
Dosimetric verification of radiation treatment has recently been extended by the introduction of electronic portal imaging devices (EPIDs). Detailed dose response specifications of EPID should be addressed prior to any dosimetric application. The present
Vahideh Nazari, Seied R Mahdavi, Ahmad Mostaar, Hassan Nedaei, Mohammad A Mosleh Shirazi, Alireza Nikoofar, Golbarg Esmailie   +6 more
doaj  

Automated VMAT planning for short-course radiotherapy in locally advanced rectal cancer.

PLoS ONE
PurposeThis study aims to develop a fully automated VMAT planning program for short-course radiotherapy (SCRT) in Locally Advanced Rectal Cancer (LARC) and assess its plan quality, feasibility, and efficiency.Materials and methodsThirty LARC patients who
Qiong Zhou, Liwen Qian, Chong Shen, Xinyan Bei, Gaojie Liu, Xiaonan Sun   +5 more
doaj   +1 more source

The GLAaS algorithm for portal dosimetry and quality assurance of RapidArc, an intensity modulated rotational therapy

Radiation Oncology, 2008
Background To expand and test the dosimetric procedure, known as GLAaS, for amorphous silicon detectors to the RapidArc intensity modulated arc delivery with Varian infrastructures and to test the RapidArc dosimetric reliability between calculation and ...
Fogliata Antonella, Clivio Alessandro, Vanetti Eugenio, Nicolini Giorgia, Korreman Stine, Bocanek Jiri, Cozzi Luca   +6 more
doaj   +1 more source

Improvement of I′mRT MatriXX in terms of spatial resolution and large area acquisition for patient-specific intensity-modulated radiotherapy verification

Journal of Medical Physics, 2009
2D array of ionization chambers can be used for both absolute and relative dose verification of patient-specific intensity-modulated radiotherapy (IMRT) quality assurance. After an analysis of the dose linearity and spatial resolution of this 2D array (I&
Oinam Arun, Singh Lakhwant, Sharma S, Goswami Pradeep   +3 more
doaj