PMID- 19926486
OWN - NLM
STAT- MEDLINE
DCOM- 20100618
LR  - 20100312
IS  - 1872-9800 (Electronic)
IS  - 0969-8043 (Linking)
VI  - 68
IP  - 4-5
DP  - 2010 Apr-May
TI  - Monte Carlo simulation of the iView GT portal imager dosimetry.
PG  - 922-5
LID - 10.1016/j.apradiso.2009.10.051 [doi]
AB  - This work is mainly focused on developing a methodology to obtain portal 
      dosimetry with an amorphous silicon electronic portal image device (EPID) by 
      means of Monte Carlo simulations and experimental measures. According to this, 
      pixel intensity values of portal images have been compared with dose measured 
      from an ionization chamber and dose obtained from Monte Carlo simulations. To 
      that, several images were acquired with the Elekta iView GT EPID using an 
      attenuator phantom slab (10 cm thickness of solid water) and a 6 MV photon energy 
      beam with different monitor units. The average pixel value in a region of 
      interest (ROI) centered at the beam selecting each image was extracted and 
      compared to dose measures performed with the ionization chamber. These parameters 
      were found to be linearly correlated with the number of monitor units (MU). 
      Since, MCNP5 simulations allow calculating the deposited dose in the ROI within 
      the phosphor layer of the EPID model, we can compare the portal dose with the 
      simulated transit dose in order to perform a treatment control.
CI  - Copyright 2009 Elsevier Ltd. All rights reserved.
FAU - Juste, B
AU  - Juste B
AD  - Chemical and Nuclear Engineering Department, Polytechnic University of Valencia, 
      Valencia, Spain. bejusvi@iqn.upv.es
FAU - Miro, R
AU  - Miro R
FAU - Diez, S
AU  - Diez S
FAU - Campayo, J M
AU  - Campayo JM
FAU - Verdu, G
AU  - Verdu G
LA  - eng
PT  - Journal Article
DEP - 20091028
PL  - England
TA  - Appl Radiat Isot
JT  - Applied radiation and isotopes : including data, instrumentation and methods for 
      use in agriculture, industry and medicine
JID - 9306253
SB  - IM
MH  - Computer Simulation
MH  - Computer-Aided Design
MH  - Equipment Design
MH  - Equipment Failure Analysis
MH  - *Models, Statistical
MH  - *Monte Carlo Method
MH  - Radiology Information Systems/*instrumentation
MH  - Radiometry/*instrumentation
MH  - Reproducibility of Results
MH  - Sensitivity and Specificity
EDAT- 2009/11/21 06:00
MHDA- 2010/06/19 06:00
CRDT- 2009/11/21 06:00
PHST- 2009/11/21 06:00 [entrez]
PHST- 2009/11/21 06:00 [pubmed]
PHST- 2010/06/19 06:00 [medline]
AID - S0969-8043(09)00668-X [pii]
AID - 10.1016/j.apradiso.2009.10.051 [doi]
PST - ppublish
SO  - Appl Radiat Isot. 2010 Apr-May;68(4-5):922-5. doi: 
      10.1016/j.apradiso.2009.10.051. Epub 2009 Oct 28.