Fiducial detection and registration for 3D IMRT QA with organ‐specific dose information
نویسندگان
چکیده
منابع مشابه
A dose‐gradient analysis tool for IMRT QA
The use of intensity-modulated radiation therapy (IMRT) has led to an increase in the number of complex fields that require measurement and comparison to calculated dose distributions in 2D. Current dose-evaluation techniques, including isodose line comparisons, displays of the dose difference between calculated and measured distributions, and distance-to-agreement (DTA) comparisons, are useful...
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Mutual information (MI) is a widely used similarity metric for multimodality image registration. However, it involves an extremely high computational time especially when it is applied to volume images. Moreover, its robustness is affected by existence of local maxima. The multi-resolution pyramid approaches have been proposed to speed up the registration process and increase the accuracy of th...
متن کاملEfficient independent planar dose calculation for FFF IMRT QA with a bivariate Gaussian source model
The aim of this study is to perform a direct comparison of the source model for photon beams with and without flattening filter (FF) and to develop an efficient independent algorithm for planar dose calculation for FF-free (FFF) intensity-modulated radiotherapy (IMRT) quality assurance (QA). The source model consisted of a point source modeling the primary photons and extrafocal bivariate Gauss...
متن کاملSU-E-T-368: Effect of Oblique Beam Incidence On 3D Dose Reconstruction for Small Field IMRT QA.
PURPOSE To compare dose reconstruction accuracy with different oblique beam angles when 2d detector arrays are used for small field IMRT QA. METHODS 2D detector arrays are convenient to use but their low resolution limits the number of sampling points inside small radiation fields. In this study, we demonstrate that with oblique beam incidence, more points can be measured and 3D dose volume c...
متن کاملImage processing for IMRT QA dosimetry
We have automated the determination of the placement location of the dosimetry ion chamber within intensity-modulated radiotherapy (IMRT) fields, as part of streamlining the entire IMRT quality assurance process. This paper describes the mathematical image-processing techniques to arrive at the appropriate measurement locations within the planar dose maps of the IMRT fields. A specific spot wit...
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ژورنال
عنوان ژورنال: Journal of Applied Clinical Medical Physics
سال: 2021
ISSN: 1526-9914,1526-9914
DOI: 10.1002/acm2.13237