PURPOSE To report on preliminary results of a prospective study on MRI-assisted cervix cancer brachytherapy pre-planning. MATERIAL AND METHODS In six locally advanced cervix cancer patients, five days before the first brachytherapy fraction, tandem & ring applicator was inserted under para-cervical anaesthesia, MRI performed and applicator removed. Procedure-time and patient-tolerability were...

The goal of the present study was to develop a new dose-volume histogram (DVH)- based homogeneity index for effectively evaluating the dose homogeneity of intensity-modulated radiotherapy plans. The new index, called the sigma-index ("S-index") is defined as the standard deviation of the normalized differential DVH curve. In a study of 16 patients with brain tumors at our institution, the S-ind...

Purpose: Multi-fraction high-dose-rate (HDR) brachytherapy (BT) is an important element in the treatment regimen for locally advanced carcinoma of cervix. While standard treatment planning guidelines have been established for dose-volume-histogram (DVH) based thresholds for the surrounding organs at risk (OAR), there are still high-grade complications observed in these OAR that cannot be explai...

Purpose The purpose was to study comparative evaluation of calculated dose distribution by X-ray Voxel Monte Carlo (XVMC) for calculation in Acuros XB (AXB). commissioning and head neck volumetric modulated arc therapy (VMAT) clinical cases were compared AXB Eclipse XVMC Monaco. Methods For TrueBeam at 6 MV, we the simple rectangle, heterogeneity correction, multileaf collimator (MLC) character...

ObjectiveDose prediction using deep learning networks prior to radiotherapy might lead tomore efficient modality selections. The study goal was predict proton and photon dose distributions based on the patient-specific anatomy assess their clinical usage for paediatric abdominal tumours.Material methodsData from 80 patients with neuroblastoma or Wilms’ tumour included. Pencil beam scanning (PBS...

Purpose The aim of this study was to quantify the discrepancies in geometrical and dosimetric impacts (in volumetric modulated arc therapy) between manually segmented (MS) contours smart segmentation (SS) auto-contours (by Varian Eclipse Treatment Planning System SS v13.5) for prostate cancer patients. Methods automated carried out by (Varian, version 13.5) Smart Segmentation workspace 10 patie...