Dosimetric evaluation of hybrid and volumetric-modulated arc therapy plan for left-sided chest wall irradiation in MONACO treatment planning system.

Background And Objective: Radiation induced toxicities in heart and lungs are diminishes the survival rate of cancer patients. The purpose of this study is to evaluate the dosimetric parameters of hybrid plans for chest wall irradiation of left breast carcinoma patients using Monaco treatment planning system and compare with the volumetric-modulated arc therapy (VMAT) treatment plans. Materials and Methods: Fifteen carcinoma left breast patients were randomly selected to evaluate the advantage of hybrid plan over VMAT.

Measurements and Monte Carlo calculation of radial dose and anisotropy functions of BEBIG Co high-dose-rate brachytherapy source in a bounded water phantom.

Purpose: The study compared the experimentally measured radial dose function, g(), and anisotropy function, (,θ), of a BEBIG Co (Co0.A86) high-dose-rate (HDR) source in an in-house designed water phantom with egs_brachy Monte Carlo (MC) calculated values. MC results available in the literature were only for unbounded phantoms, and there are no currently published data in the literature for experimental data compared to MC calculations for a bounded phantom.

Implementation and Evaluation of Phantomless Intensity Modulated Radiotherapy Delivery Verification Using FractionCHECK.

Introduction: The objective was to implement the DynaLog file-based automated FractionCHECKTM software which verifies the delivery accuracy of all patient treatments without any measuring devices and evaluate this tool for dynamic IMRT delivery verification of 40 cases. The present work was aimed to find the generalized results with user-defined tolerances of all treatment deliveries and asses the delivery results in terms of Pass/Warn/fail analysis. In addition to this, an in-depth analysis of mean RMS error of each BANK of the MLC's and mean 95th Percentile error of all the leaves and percentage of pixels passing Gamma between the planned and delivered fluences for all 40 dynamic IMRT cases.

Analysis of small field percent depth dose and profiles: Comparison of measurements with various detectors and effects of detector orientation with different jaw settings.

The advent of modern technologies in radiotherapy poses an increased challenge in the determination of dosimetric parameters of small fields that exhibit a high degree of uncertainty. Percent depth dose and beam profiles were acquired using different detectors in two different orientations. The parameters such as relative surface dose (D S), depth of dose maximum (D max), percentage dose at 10 cm (D 10), penumbral width, flatness, and symmetry were evaluated with different detectors.

Variation of beam characteristics between three different wedges from a dual-energy accelerator.

The use of megavoltage X-ray sources of radiation, with their skin-sparing qualities in radiation therapy, has been proved useful in relieving patient discomfort and allowing higher tumor doses to be given with fewer restrictions due to radiation effects in the skin. The purpose of this study was to compare the dosimetric characteristics of a physical and enhanced dynamic wedge from a dual-energy (6 and 18 MV) linear accelerator such as surfaces doses with different source to surface distances (SSD), half value layer (HVL) in water and peripheral doses for both available energies. At short SSD such as 85 cm, higher surface doses are produced by the lower wedges by the short wedge-to-skin distance.