Introduction
Complexity analysis has proven to be an important tool for treatment plans characterization and comparison, contributing to improve the quality, efficiency and safety of the planning and delivery processes [1]. The purpose of this work is to evaluate the complexity of helical tomotherapy (HT) plans using some indicators recently proposed [2] and assess their potential to predict...
MRLinacs provide the means of high resolution soft-tissue image contrast at the time of treatment to visualize the target and the surrounding normal tissue for image guided radiotherapy (RT).
The MRLinac is currently used for adaptation of the treatment based on the daily anatomical changes. This may lead to smaller margins and increased use of hypofractionation. The potential is to adapt the...
Introduction: In IMRT treatment planning, there has been little interest in defining parameters to assess the quality of the treatment plan using quantitative metrics. This work was carried out for the first time to develop a series of virtual phantom to assess the IMRT planning complexity. Methods: A series of virtual phantoms were designed by using MATLAB® software (MathWorks, Natick, MA,...
Introduction of the study
Different small field detectors are available for commissioning measurements. For each task, i.e. depth dose curves, profiles and output factor measurements, the detector response depends on properties such as the active volume size, material composition and density relative to water. In the absence of an ideal detector, measurements are typically a compromise...
Irradiation of blood and blood components is practiced with the main purpose of preventing graft versus host disease in immunodeficient patients. Transfusion-associated graft-versus-host disease (TA-GVHD) is a possible transfusion reaction and can often be a fatal complication occurring in patients receiving cellular blood components. Inactivation of transfused lymphocytes by the use of...
Introduction: This study aimed to develop a contact lens-type ocular in vivo dosimeter that can be worn directly on the eye and assess its dosimetric characteristics and biological stability for radiation therapy.
Methods: The molder of a soft contact lens was directly used to create the dosimeter, which included a radiation-sensitive component to measure the delivered dose. A flatbed scanner...
Introduction: The Royal Hospital in Muscat, Oman, obtained a Varian TrueBeam ver 2.5 SRT linac in 2016. 6 MV and 6 FFF photon beams were commissioned on an Eclipse treatment planning system (Ver 13.7) using dosimetric data ranging from 40x40 cm2 to 4x4 cm2 as recommended by the vendor. Although a dedicated iPlan treatment planning system is routinely used for stereotactic radio-surgery (SRS)...
Introduction of the study
Electronic portal imaging device (EPID) offers high-resolution digital image that can be used to quantitatively compare a measured and calculated dose distribution that is routinely used for quality assurance (QA) of volumetric-modulated arc therapy (VMAT) and stereotactic radiation therapy (SRT) treatment plans by the evaluation of the gamma index. The aim of...
