INTRODUCTION This study compared four different volumetric modulated arc therapy (VMAT) beam arrangements for the treatment of early-stage prostate cancer examining plan quality and the impact on a radiotherapy department's resources. METHODS Twenty prostate cases were retrospectively planned using four VMAT beam arrangements (1) a partial arc (PA), (2) one arc (1A), (3) one arc plus a partia...

In this paper, we propose a novel heuristic algorithm for the volumetric-modulated arc therapy treatment planning problem, optimizing the trade-off between delivery time and treatment quality. We present a new mixed integer programming model in which the multi-leaf collimator leaf positions, gantry speed, and dose rate are determined simultaneously. Our heuristic is based on column generation; ...

Intensity-modulated radiotherapy (IMRT) has become an effective tool for cancer treatment with radiation. However, even expert radiation planners still need to spend a substantial amount of time manually adjusting IMRT optimization parameters such as dose limits and costlet weights in order to obtain a clinically acceptable plan. In this paper, we describe two main advances that simplify the pa...

The advanced developments in external beam radiation therapy (EBRT) over the past few decades have improved dose conformity to the target while minimizing dose to the surrounding organs at risk (OAR). Intensity modulated radiation therapy (IMRT) and volumetric modulated arc therapy (VMAT) are two commonly used EBRT techniques to treat cancer. In sliding window (SW) or dynamic IMRT, each radiati...

Treatment of Multiple Brain Metastases Using Stereotactic Radiosurgery with Single-Isocenter Volumetric Modulated Arc Therapy: Comparison with Conventional Dynamic Conformal Arc and Static Beam Stereotactic Radiosurgery by

Submit Manuscript | http://medcraveonline.com Abbreviations: TCP: Tumor Control Probability; NTCP: Normal Tissue Control Probability; LKB: Lyman Kutcher Burman; IGRT: Image Guided Radiation Therapy; IMRT: Intensity Modulated Radiation Therapy; SIB-IMRT: Simultaneous Integrated BoostIMRT; VMAT: Volumetric Modulated Arc Therapy; DA: Double Arc; SA: Single Arc; HT: Helical Tomotherapy; IFP: Improv...

Introduction: Planning target volume (PTV) is generated from internal treatment volume (ITV) using four-dimensional computed tomography (4D-CT) for enhanced therapeutic gain in the stereotactic body radiotherapy for lung lesions (SBRT-Lung). This study aimed to propose a strategy to generate ITV on multiple-phase 3D-CT and enhance therapeutic gain in SBRT-Lung. <stron...

no 1: Technical challenges of fast volumetric rescanning O. Actis, D. Meer, A. Mayor, G. Klimpki, S. Psoroulas, D.C. Weber For pencil beam scanning the most studied method to mitigate the dose delivery uncertainties due to the organ motion is rescanning. Achieving an optimal treatment for a moving target by volumetric rescanning, where the whole tumour volume is scanned multiple times, requires...

Intensity-modulated radiotherapy (IMRT) is one of the most important recent developments in oncology. It enables precise conformation of the radiation dose to the target volume. It has the potential to significantly reduce long-term morbidity and improve local control. This article explains the basic principles of IMRT in comparison to other planning techniques. The current clinical data are pr...

Singleton arc consistency (SAC) is a local consistency that enhances the pruning capability of arc consistency by ensuring that the network can be made arc consistent after any assignment of a value to a variable. While some algorithms have been proposed in the literature to enforce SAC, a more in-depth theoretical analysis of this local consistency has never been published. In this paper, we g...