RT info:eu-repo/semantics/conferenceObject
T1 Groupwise Non-Rigid Registration On Multiparametric Abdominal Dwi Acquisitions For Robust Adc Estimation: Comparison With Pairwise Approaches And Different Multimodal Metrics
A1 Sanz Estébanez, Santiago Rodrigo
A1 Peña Nogales, Óscar
A1 Luis García, Rodrigo de
A1 Aja Fernández, Santiago
A1 Alberola López, Carlos
AB Registration of diffusion weighted datasets remains a challenging task in the process of quantifying diffusion indexes. Respi- ratory and cardiac motion, as well as echo-planar characteristic geometric distortions, may greatly limit accuracy on parameter estimation, specially for the liver. This work proposes a methodology for the non-rigid registration of multiparametric abdomi- nal diffusion weighted imaging by using different well-known metrics under the groupwise paradigm. A three-stage validation of the methodology is carried out on a computational diffusion phantom, a watery solution phantom and a set of voluntary patients. Diffusion estimation accuracy has been directly calculated on the computational phantom and indirectly by means of a residual analysis on the real data. On the other hand, effectiveness in distortion correction has been measured on the phan- tom. Results have shown statistical significant improvements compared to pairwise registration being able to cope with elastic deformations.
YR 2017
FD 2017
LK http://uvadoc.uva.es/handle/10324/25465
UL http://uvadoc.uva.es/handle/10324/25465
LA eng
DS UVaDOC
RD 22-nov-2024