نتایج جستجو برای: dose volume constraints
تعداد نتایج: 787080 فیلتر نتایج به سال:
هدف اصلی رادیوتراپی نابود کردن تمامی سلولهای سرطانی و رساندن کمترین آسیب به بافت های سالم اطراف تومور می باشد. برای رسیدن به هدف فوق می بایست قبل از شروع هر دوره درمانی ابتدا یک درمان مناسب را بر اساس بیشترین احتمال کنترل تومور و کمترین احتمال آسیب بافت های سالم اطراف طراحی کرد که برای انجام چنین فرایندی دانستن روابط دز- پاسخ تمامی ارگان ها الزامی است. یکی از ارگان های بدن که دارای حساسیت پرتوی...
PURPOSE To compare International Commission on Radiation Units and Measurements (ICRU) bladder and rectum reference points doses with volumetric doses in 3D intracavitary brachytherapy (ICBT) for cervical cancer. Also to compare bladder, rectum and sigmoid (organs at risk, OARs) volume doses with dose constraints recommended by the (GYN) GEC-ESTRO Working Group. MATERIAL AND METHODS A retrosp...
AIM To investigate the impact of definitive radiation therapy (RT) in the management of early glottic cancer on clinical RT-induced dysphagia (RID) and carotid vasculopathy (RICV). PATIENTS AND METHODS This is a single-institution retrospective study. From January 1997 to 2010, 253 patients, with early glottic cancer, underwent RT with (60)Co or LINAC-6 MV photons. RT fields with wedge pair a...
Background: Identify the optimal technique of radiotherapy for patients with high grade glioma. Our initial year of experience with RapidArc radiation therapy. Materials and Methods: Planning CT scans of 50 patients with grade IV glioma were reviewed and three plan sets by 3D Conformal Radiotherapy (3DCRT), Intensity Modulated Radiotherapy (IMRT) and Rapid Arc (RA) were generated and the plans ...
Prescriptions for radiation therapy are given in terms of dose-volume constraints (DVCs). Solving the fluence map optimization (FMO) problem while satisfying DVCs often requires a tedious trial-and-error for selecting appropriate dose control parameters on various organs. In this paper, we propose an iterative approach to satisfy DVCs using a multi-objective linear programming (LP) model for so...
PURPOSE We studied symptomatic radiation pneumonitis (RP) and changes in pulmonary function tests (PFTs) after loco-regional radiotherapy (LRRT) with V20 lung constraints in breast cancer (BC). PATIENTS AND METHODS Sixty-four women underwent PFTs before and 5 months after 3D planned LRRT for BC. The incidentally irradiated ipsilateral lung V20 was minimised to <30%. Patients were monitored fo...
PURPOSE Using a retrospective analysis of treatment plans submitted from multiple institutions accruing patients to the Radiation Therapy Oncology Group (RTOG) 0236 non-small-cell stereotactic body radiotherapy protocol, the present study determined the dose prescription and critical structure constraints for future stereotactic body radiotherapy lung protocols that mandate density-corrected do...
The second part of the GYN GEC ESTRO working group recommendations is focused on 3D dose-volume parameters for brachytherapy of cervical carcinoma. Methods and parameters have been developed and validated from dosimetric, imaging and clinical experience from different institutions (University of Vienna, IGR Paris, University of Leuven). Cumulative dose volume histograms (DVH) are recommended fo...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید