Background: Aim of this study is to evaluate the accuracy of the gated volumetric modulated arc therapy (VMAT/RapidArc) using 2D planar dosimetry, DynaLog files and COMPASS 3D dosimetry system. Materials and Methods: Pre-treatment quality assurance of 10 gated VMAT plans was verified using 2D array and COMPASS 3D dosimetry system. Advantage of COMPASS over 2D planar is that it provides the clin...

Background: Absolute dosimetry of external beam radiotherapy is carried out by the use of ionization chambers. These chambers must be calibrated at a standard dosimetry laboratory before any use in clinical dosimetry. The secondary standard dosimetry laboratory of Iran (SSDL) has the duty of calibrating the ionization chambers used in radiotherapy centers in Iran. Materials and Methods...

The work presents application of previously proposed approach for transverse profile forming high energy electron beams with plastic samples made using 3D printing technology. collimator PLA (polylactide) is designed and produced in a frame this work. results 6 MeV beam clinical linear accelerator Elekta Synergy presented. Obtained comparison data from XiO dosimetry planning system shows good a...

There is significant interest in delivering precisely targeted small-volume radiation treatments, in the pre-clinical setting, to study dose-volume relationships with tumor control and normal tissue damage. In this work we investigate the IGRT targeting accuracy of the XRad225Cx system from Precision x-Ray using high resolution 3D dosimetry techniques. Initial results revealed a significant tar...

BACKGROUND Currently, the implementation of dosimetry in molecular radiotherapy (MRT) is not well investigated, and in view of the Council Directive (2013/59/Euratom), there is a need to understand the current availability of dosimetry-based MRT in clinical practice and research studies. The aim of this study was to assess the current practice of MRT and dosimetry across European countries. M...

PURPOSE To analyze intraoperative (IO) dosimetry using transrectal ultrasound (TRUS), performed before and after prostate low-dose-rate brachytherapy (LDR-BT), and compare it to dosimetry performed 30 days following the LDR-BT implant (Day 30). MATERIAL AND METHODS A total of 236 patients underwent prostate LDR-BT using 125I that was performed with a three-dimensional TRUS-guided interactive ...

Magnesium silicate has been prepared by a precipitation technique. This composite structure was proven different tools, XRD, TGA&DTA, FTIR, and XRF. found to have the formulas Mg1.1SiO3.2.1.1H2O. Thermoluminescence (TL) dosimetric properties like (linearity, fading, energy independence) of magnesium in shape MgSiO3 estimated. A strong TL dosimetry peak associated with gamma radiation arises fro...

Computed tomography (CT) dosimetry normally uses an ionization chamber 100 mm long to estimate the computed tomography dose index (CTDI), however some reports have already indicated that small devices could replace the long ion chamber to improve quality assurance procedures in CT dosimetry. This paper presents a novel dosimetry system based in a commercial phototransistor evaluated for CT dosi...

Background: Small-field dosimetry remains an open challenge globally. Thus, it is crucial to consider adequate reference codes of practice for the performance dosimetry. Furthermore, as part good clinical practice, implementation new implies development a audit program. In this work, pilot dosimetric protocol established measuring absolute dose in water small fields using micro-TLDs LiF:Mg,Ti d...