2024-03-29T06:08:14Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/254652021-06-23T13:29:57Zcom_10324_1191com_10324_931com_10324_894col_10324_1381
Sanz Estébanez, Santiago Rodrigo
Peña Nogales, Óscar
Luis García, Rodrigo de
Aja Fernández, Santiago
Alberola López, Carlos
2017-09-09T02:04:31Z
2017-09-09T02:04:31Z
2017
http://uvadoc.uva.es/handle/10324/25465
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.
application/pdf
eng
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Attribution 4.0 International
Groupwise Non-Rigid Registration On Multiparametric Abdominal Dwi Acquisitions For Robust Adc Estimation: Comparison With Pairwise Approaches And Different Multimodal Metrics
ISBI 2017
info:eu-repo/semantics/conferenceObject