منابع مشابه
On correlations in IMRT planning aims
The purpose was to study correlations amongst IMRT DVH evaluation points and how their relaxation impacts the overall plan. 100 head-and-neck cancer cases, using the Eclipse treatment planning system with the same protocol, are statisti-cally analyzed for PTV, brainstem, and spinal cord. To measure variations amongst the plans, we use (i) interquartile range (IQR) of volume as a function of dos...
متن کاملTreatment Planning Considerations Using IMRT
Introduction ...........................................................103 IMRT or 3DCRT? ...................................................105 The MSKCC IMRT Planning Process....................107 Patient Selection • Patient Simulation And Structure Localization • Selection Of Beam Energy, Number, And Direction • Optimization • Conversion Of Intensity Profiles To Leaf Motion • Forward Dose ...
متن کاملReduced-order constrained optimization in IMRT planning.
This paper presents a new algorithm for constrained intensity-modulated radiotherapy (IMRT) planning, made tractable by a dimensionality reduction using a set of plans obtained by fast, unconstrained optimizations. The main result is to reduce planning time by an order of magnitude, producing viable five field prostate IMRT plans in about 5 min. Broadly, the algorithm has three steps. First, we...
متن کاملCommissioning compensator‐based IMRT on the Pinnacle treatment planning system
We present a systematic approach to commissioning of the compensator-based IMRT in Pinnacle treatment planning system for commercially manufactured brass compensators. Some model parameters for the beams modulated by the variable-thickness compensators can only be associated with a single compensator thickness. To intelligently choose that thickness for beam modeling, we empirically determined ...
متن کاملThe Optimization of Inverse Planning and IMRT
All inverse planning involves weight optimization. Beamlet-based Inverse Planning (BBIP) irradiates complex target volumes with a large number of small beams. The number of small beams or beamlets is often more than one thousand. The optimization process adjusts the weights of these beams to produce a desired dose distribution. Delivery of this large number of small beams is challenging, but ma...
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ژورنال
عنوان ژورنال: Journal of Applied Clinical Medical Physics
سال: 2016
ISSN: 1526-9914
DOI: 10.1120/jacmp.v17i6.6411