Results 91 to 100 of about 21,477 (200)
Journal of Medical Physics, 2019 Objective: This study demonstrates a novel electronic portal imaging device (EPID)-based forward dosimetry approach for pretreatment quality assurance aided by a treatment planning system (TPS).
Arjunan Manikandan +3 more
doaj +1 more source
Flu Shots, Mammograms, and the Perception of Probabilities [PDF]
We study individuals' decisions to decline or accept preventive health care interventions such as flu shots and mammograms. In particular, we analyze the role of perceptions of the effectiveness of the intervention, by eliciting individuals' subjective ...
Carman, Katherine Grace, Kooreman, Peter
core
Semiparametric theory and empirical processes in causal inference
, 2016 In this paper we review important aspects of semiparametric theory and empirical processes that arise in causal inference problems. We begin with a brief introduction to the general problem of causal inference, and go on to discuss estimation and ...
A. Belloni +64 more
core +1 more source
A collapsed-cone based transit EPID dosimetry method
Physica Medica, 2018 To develop a transit-dose portal dosimetry method based on a commercial collapsed-cone algorithm.A Varian Clinac21EX (Varian Medical Systems, USA), equipped with an amorphous-silicon EPID aS1000, was used. Dose calculations were performed with the collapsed-cone algorithm of Pinnacle3 v8.0 m (Philips Medical Systems, USA).
Martínez Ortega, Jaime +7 more
openaire +2 more sources
Reproductive Risk Factors for Breast Cancer: A Case Control Study [PDF]
, 2009 Background: Breast cancer is second most important cancer among Indian women. Although risk factors are not much prevalent as in western countries, incidence rate is increasing in India.
Hiwarkar, PA, Kulkarni, PN, Meshram, II
core
Performance optimization of the Varian aS500 EPID system
Journal of Applied Clinical Medical Physics, 2006 Today, electronic portal imaging devices (EPIDs) are widely used as a replacement to portal films for patient position verification, but the image quality is not always optimal. The general aim of this study was to optimize the acquisition parameters of an amorphous silicon EPID commercially available for clinical use in radiation therapy with the view
Berger, Lucie +3 more
openaire +2 more sources
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 +6 more
doaj
EPID dosimetry – configuration and pre-treatment IMRT verification
Reports of Practical Oncology & Radiotherapy, 2007 SummaryBackgroundThe electronic portal imaging device (EPID) is used for patient setup during radiotherapy sessions. Dosimetric verification is done using ion chambers, diodes and thermoluminescence detectors. In intensity-modulated radiation therapy (IMRT) the dosimetry is a sophisticated and time-consuming task.
Grządziel, Aleksandra +3 more
openaire +1 more source
"Epid." II, IV y VI: composición de sus historias clínicas [PDF]
, 2012 Este trabajo consiste en un análisis de las historias clínicas de Epidemias II, IV y VI, especialmente en lo que respecta a su estructura, basada en una serie de datos fijos referentes al paciente, su identidad y su entorno, así como los concernientes a ...
Esteban Santos, Alicia
core +1 more source
THE ROLE OF RISK ASSESSMENT IN MANAGING RISK [PDF]
Risk and Uncertainty,
Ahmad, A. +6 more
core +1 more source