Results 101 to 110 of about 7,410 (208)

Comparison of EPID portal dosimetry verification and RadCalc dose verification for VMAT treatment plans

open access: yesNowotwory
INTRODUCTION: Dosimetry verification is required before starting each treatment. The legal regulations do not clearly define one method of plan verification.
Adam Gądek   +4 more
doaj   +1 more source

Evaluation of MegaVoltage Cone Beam CT image quality with an unmodified Elekta Precise Linac and EPID : a feasibility study

open access: yes, 2014
In order to increase the accuracy of patient positioning for complex radiotherapy treatments various 3D imaging techniques have been developed. MegaVoltage Cone Beam CT (MVCBCT) can utilise existing hardware to implement a 3D imaging modality to aid ...
Fielding, Andrew L.   +3 more
core   +1 more source

In vivo δοσιμετρία ακτινοθεραπευτικής δέσμης φωτονίων με τη χρήση a-Si EPID

open access: yes, 2015
Σκοπός: Η αξιολόγηση μιας εύκολα εφαρμόσιμης μεθόδου δοσιμετρίας EPID, η οποία βασίζεται στη προσέγγιση της οπισθοπροβολής, και η σύγκρισή της με τη μέθοδο δοσιμετρίας EBT2 φιλμ. Μέθοδος: Προσδιορίστηκαν τα δοσιμετρικά χαρακτηριστικά του EPID.
Μανδουράρη Καλλιόπη
core  

Characterization of the a-Si EPID in the unity MR-linac for dosimetric applications

open access: yes, 2018
Electronic portal imaging devices (EPIDs) are frequently used in external beam radiation therapy for dose verification purposes. The aim of this study was to investigate the dose-response characteristics of the EPID in the Unity MR-linac (Elekta AB ...
I Olaciregui-Ruiz   +11 more
core   +2 more sources

Direct dose to water dosimetry for pretreatment IMRT verification using a modified EPID

open access: yes, 2011
Purpose: Electronic portal imaging devices (EPIDs) are high resolution systems that produce electronic dose maps with minimal time required for equipment setup, and therefore potentially present a time-saving alternative for intensity modulated ...
Baldock, C (15601538)   +5 more
core  

Monitoring harian pesawat linac dengan EPID: studi pendahuluan [PDF]

open access: yes, 2019
Took place in Persahabatan Hospital, Department of Radiotherapy, a research has been held using Linac Elekta Precise equipped by EPID (Electronic Portal Imaging Device).
Sugiyantari, Sugiyantari; Instalasi Radioterapi, RSUP Persahabatan, Jakarta Timur, DKI Jakarta, 13230   +1 more
core  

The use of the transit-EPID images in the radiotherapy quality assurance – literature review

open access: yes, 2021
Wraz z rozwojem coraz bardziej złożonych technik napromieniania pacjenta wiązkami zewnętrznymi, weryfikacja prawidłowości ich realizacji staje się coraz większym wyzwaniem.
Borowska, Patrycja   +2 more
core  

ENFERMEDAD PULMONAR INTERSTICIAL DIFUSA (EPID)

open access: yesRevista Cuarzo, 2016
Si bien es cierto que la radiografía simple del tórax permite sospechar la presencia de enfermedad pulmonar instersticial, la tomografía axial computarizada (TACAR) es más sensible y específica en la valoración de pacientes con esta enfermedad. En este artículo se trata sobre los patrones básicos que permiten identificar los diversos grupos de EPID ...
openaire   +3 more sources

2d dose measurement using a flat panel EPID

open access: yes, 2008
The increasing use of intensity modulated radiation therapy (IMRT) to deliver conformal radiation treatment has prompted the search for a faster and more cost effective quality assurance (QA) system.
Lim, Seng Boh
core  

Four-Dimensional In Vivo Dosimetry By Dose Reconstruction Using Continuous Epid Images And Phase Sorting Method

open access: yes, 2015
In vivo dosimetry is widely used for patient specific dose evaluation and treatment verification in external beam radiation therapy (EBRT). There is a growing interest in using an electronic portal imaging device (EPID) for in vivo dosimetry, by ...
Yoon, JiHyung
core  

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