NDLI: Dosimetric capabilities of the Iview GT portal imager using MCNP5 monte carlo simulations

Content Provider	IEEE Xplore Digital Library
Author	Juste, B. Miro, R. Diez, S. Campayo, J.M. Verdu, G.
Copyright Year	2009
Description	Author affiliation: Chemical and Nuclear Engineering Department at the Polytechnic University of Valencia, Camí de Vera s/n 46022 Valencia, Spain (Juste, B.; Miro, R.; Campayo, J.M.; Verdu, G.) \|\| Radio-physicists at the Hospital Clínic Universitari de Valencia, Avda. Blasco Ibáñez, 17. 46010, Valencia, Spain (Diez, S.)
Abstract	This work is focused on developing a methodology to obtain portal dosimetry with an amorphous silicon Electronic Portal Image Device (a-Si EPID) used in radiotherapy by means of Monte Carlo simulations and experimental measures. Pixel intensity values from portal images have been compared with dose measured from an ionization chamber and dose calculated from Monte Carlo simulations. To this end, several images were acquired with the Elekta iView GT EPID using an attenuator phantom slab (10 cm thickness of solid water) and a 6 MeV photon energy beam with different monitor units settings (MU). The average pixel value in a region of interest (ROI) centered at the beam for each image was extracted and compared to dose measures performed with an ionization chamber. These parameters were found to be linearly related with the number of monitor units. Since MCNP5 simulations allow calculating the deposited dose in the ROI within the phosphor layer of the EPID model, we could compare the portal dose with the simulated transit dose in order to perform a treatment control.
Starting Page	3743
Ending Page	3746
File Size	696583
Page Count	4
File Format	PDF
ISBN	9781424432967
ISSN	1557170X
DOI	10.1109/IEMBS.2009.5334899
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Portals Pixel Ionization chambers Dosimetry Amorphous silicon Attenuators Imaging phantoms Slabs Solids Monitoring
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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MCNP5 Monte Carlo simulation of amorphous silicon EPID dosimetry from MLC radiation therapy treatment beams

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Monte carlo simulations of the transit dose from amorphous silicon electronic portal images.

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Monte Carlo Simulations of the Transit Dose from Amorphous Silicon Electronic Portal Images

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Dosimetric capabilities of the Iview GT portal imager using MCNP5 monte carlo simulations

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