Results 31 to 40 of about 313,243 (217)

Noise level inside sri lanka transport board buses and hearing impairment of long- and short-distance bus drivers of ampara and Batticaloa Districts, Sri Lanka

Indian Journal of Community Medicine, 2022
Background: Transport drivers are more vulnerable to hearing impairment due to the traffic environment and fast-growing urbanization. Objective: The study aims to determine the noise level inside the Sri Lanka Transport Board (SLTB) buses, hearing ...
Suresh Kannah Shanmugarajah, Millawage Supun Dilara Wijesinghe   +1 more
doaj   +1 more source

AAPM Task Group Report 307: Use of EPIDs for Patient-Specific IMRT and VMAT QA. [PDF]

Med Phys, 2023
Purpose: Electronic portal imaging devices (EPIDs) have been widely utilized for patient-specific quality assurance (PSQA) and their use for transit dosimetry applications is emerging.
Dogan N, Mijnheer BJ, Padgett K, Nalichowski A, Wu C, Nyflot MJ, Olch AJ, Papanikolaou N, Shi J, Holmes SM, Moran J, Greer PB.   +11 more
europepmc   +2 more sources

Evolution of Portable Sensors for In-Vivo Dose and Time-Activity Curve Monitoring as Tools for Personalized Dosimetry in Molecular Radiotherapy

Sensors, 2023
Treatment personalization in Molecular Radiotherapy (MRT) relies on pre- and post-treatment SPECT/ PET-based images and measurements to obtain a patient-specific absorbed dose-rate distribution map and its evolution over time.
Lidia Strigari, Raffaella Marconi, Elena Solfaroli-Camillocci   +2 more
doaj   +1 more source

Setup in a clinical workflow and impact on radiotherapy routine of an in vivo dosimetry procedure with an electronic portal imaging device. [PDF]

PLoS ONE, 2018
High conformal techniques such as intensity-modulated radiation therapy and volumetric-modulated arc therapy are widely used in overloaded radiotherapy departments.
Jie Li, Angelo Piermattei, Pei Wang, Shengwei Kang, Mingyong Xiao, Bin Tang, Xiongfei Liao, Xin Xin, Mattia Grusio, Lucia Clara Orlandini   +9 more
doaj   +1 more source

Time-Resolved Versus Integrated Transit Planar Dosimetry for Volumetric Modulated Arc Therapy: Patient-Specific Dose Differences During Treatment, a Proof of Principle [PDF]

, 2016
Purpose: It is desirable that dosimetric deviations during radiation treatments are detected. Integrated transit planar dosimetry is commonly used to evaluate external beam treatments such as volumetric-modulated arc therapy. This work focuses on patient
Troost, E. G. C., Nijsten, S. M. J. J. G., Persoon, L. C. G. G., Podesta, M., Verhaegen, F.   +4 more
core   +1 more source

Feasibility Study of Transit Dosimetry (TD) with an Electronic Portal Imaging Device (EPID) in volumetric arc therapy (VMAT) for head and neck cancer (HNC) [PDF]

Iranian Journal of Medical Physics
Introduction: The progress in radiotherapy treatment modalities, such as Intensity Modulated Radiotherapy (IMRT) and Volumetric Arc Therapy (VMAT), introduces considerable complexity.
ARVIND DIUNDI, KIRAN SHARMA, CHANDI BHATT, SANGEETA HAZARIKA   +3 more
doaj   +1 more source

Comparing treatment uncertainty for ultra- vs. standard-hypofractionated breast radiation therapy based on in-vivo dosimetry

Physics and Imaging in Radiation Oncology, 2022
Background and purpose: Postoperative ultrahypofractionated radiation therapy (UHFRT) in 5 fractions (fx) for breast cancer patients is as effective and safe as conventionally hypofractionated RT (HFRT) in 15 fx, liberating time for higher-level daily ...
Yawo A.C. Fiagan, Evy Bossuyt, Melanie Machiels, Daan Nevens, Charlotte Billiet, Philip Poortmans, Thierry Gevaert, Dirk Verellen   +7 more
doaj   +1 more source

A simple method to back-project isocenter dose of radiotherapy treatments using EPID transit dosimetry

Brazilian Journal of Radiation Sciences, 2017
The aim of this work was to implement a simple algorithm to evaluate isocenter dose in a phantom using the back-projected transmitted dose acquired using an Electronic Portal Imaging Device (EPID) available in a Varian Trilogy accelerator with two ...
Thiago Bernardino da Silveira, Bianca de Quadros Cerbaro, Luiz Antônio Ribeiro da Rosa   +2 more
doaj   +1 more source

Evaluation of an Electronic Portal Imaging Device for Transit Dosimetry [PDF]

Acta Oncologica, 1999
The possibility of using a commercially available electronic portal imaging device for transit dosimetry was investigated. The detection unit of the device comprises a metal plate/fluorescence screen and a camera. Basic parameters of this system were investigated: stability, detector uniformity, dose-response curve, field-size dependence and phantom ...
X, He, A, Van Esch, R, Reymen, D, Huyskens   +3 more
openaire   +2 more sources

Transit Dosimetry for Patient Treatment Verification with an Electronic Portal Imaging Device [PDF]

, 2012
The complex and individualized photon fluence patterns constructed during intensity modulated radiation therapy (IMRT) treatment planning must be verified before they are delivered to the patient.
Berry, Sean Lawrence
core   +2 more sources