PURPOSE This study aims to investigate the factors that reduce fetal dose in pregnant patients with breast cancer throughout their radiation treatment. Two main factors in a standard radiation oncology center are considered as the treatment planning systems (TPSs) and simple shielding for intensity modulated radiation therapy technique. MATERIALS AND METHODS TPS factor was evaluated with two ...

PURPOSE The aim of this study is to evaluate the accuracy the collapsed cone convolution (CCC) algorithm for dose calculation in a radiation treatment planning system (TPS). METHODS We modeled various photon beams for various setup conditions in a radiation treatment planning system (CorePLANTM, Seoul C&J, Korea). The beam models were generated at various set-up conditions such as open beam o...

Accurate estimation of the surface dose in radiotherapy patients with head and neck cancer is very important terms treatment. The aim this study to evaluate for intensity-modulated (IMRT) using thermoluminescent dosimeters (TLDs). In addition, it aimed examine estimates treatment planning system (TPS) different grid sizes. Before computed tomography (CT) images were taken 15 patients, 5 points ...

We created volumetric modulated arc therapy (VMAT) plans for 31 prostate cancer patients using one of three treatment planning systems (TPSs)--ERGO++, Monaco, or Pinnacle--and then treated those patients. A dose of 74 Gy was prescribed to the planning target volume (PTV). The rectum, bladder, and femur were chosen as organs at risk (OARs) with specified dose-volume constraints. Dose volume hist...

When one is seeking an expansion proof for a theorem of higher-order logic, not all necessary substitution terms can be generated by unification of formulas already present, so certain expansion options [5] are applied, and then a search for a p-acceptable mating [2] is made, using Huet's higher-order unification algorithm [8] to generate all remaining substitution terms. The expansion options ...

OBJECTIVE To investigate the efficacy as well as the complications involved in the use of interstitial Iodine-125 implantation for the treatment of oral cavity and maxillofacial carcinomas. PATIENTS AND METHODS Fifteen patients with oral cavity and maxillofacial carcinomas received treatment planning system (TPS)-guided interstitial Iodine-125 implantation. The apparent activity per particle ...

The purpose of this study was to compare the performance of different commercial quality assurance (QA) systems for the pretreatment verification plan of stereotactic body radiotherapy (SBRT) with volumetric arc therapy (VMAT) technique using a flattening-filter-free beam. The verification for 20 pretreatment cancer patients (seven lung, six spine, and seven prostate cancers) were tested using ...

BACKGROUND The GammaPlan(™) treatment planning system (TPS) does not fully account for shutter dose when multiple shots are required to deliver a patient's treatment. The unaccounted exposures to the target site and its periphery are measured in this study. The collected data are compared to a similar effect from the Gamma Knife(®) model 4C. MATERIALS AND METHODS.: A stereotactic head frame wa...

Metal artifacts cause errors in the exact delineation of implants and dose changes radiotherapy. In this study, distribution differences region interest (ROI) were calculated by deliberately making contouring from real size model using both Monaco treatment planning system (TPS) Geant4 toolkit. Sec. 2, computed tomography images acquired placing known uniform cylindrical geometry titanium (Ti6A...

Introduction: In radiotherapy treatment planning system (TPS), basic input is the data from computed tomography (CT) scan, which takes into account the effect of inhomogeneities in dose calculations. Measurement of CT numbers may be affected by scanner-specific parameters. Therefore, it is important to verify the effect of different CT scanning protocols on Hounsfield unit (HU) and its impact o...