Adriane Parraga

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Intensity Modulated Radiotherapy is a new technique enabling the sculpting of the 3D radiation dose. It enables to modulate the delivery of the dose inside the malignant areas and constrain the radiation plan for protecting important functional areas. It also raises the issues of adequacy and accuracy of the selection and delineation of the target volumes.(More)
In this paper we compare three non-rigid registration methods for atlas-based segmentation: B-Splines, Morphons and a combination of Morphons and Demons. To assess the quality of each method, we use a data set of four patients, containing for each patient the Computed Tomography (CT) image and a manual segmentation of the organs at risk performed by an(More)
In this paper we present a methodology to build a computational atlas based on the analysis of dense deformation fields recovered by the Morphons non-rigid registration algorithm. The atlas construction procedure is based on the minimization of the effort required to register the whole database to a reference. The suitability of our method is demonstrated(More)
The aim of this work is to investigate quantitatively the capability of the Continuous Wavelet Transform (CWT) as a tool to estimate (calculate) Jitter and Shimmer, assessing the error between these indices calculated in each Wavelet decomposition and the ones for the original signal, for several dilatation levels. Two synthetic vowels /a/ were generated(More)
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