@conference {700,
	title = {Groupwise Non-Rigid Registration on Multiparametric Abdominal DWI Acquisitions for Robust ADC Estimation: Comparison with Pairwise Approaches and Different Multimodal Metrics},
	booktitle = {International Symposium on Biomedical Imaging: From Nano to Macro (ISBI2017)},
	year = {2017},
	month = {2017},
	address = {Melbourne, Australia},
	abstract = {<p>Registration of diffusion weighted datasets remains a challenging\&nbsp;task in the process of quantifying diffusion indexes.\&nbsp;Respiratory and cardiac motion, as well as echo-planar characteristic\&nbsp;geometric distortions, may greatly limit accuracy on\&nbsp;parameter estimation, specially for the liver. This work proposes\&nbsp;a methodology for the non-rigid registration of multiparametric\&nbsp;abdominal diffusion weighted imaging by using\&nbsp;different well-known metrics under the groupwise paradigm.\&nbsp;A three-stage validation of the methodology is carried out on\&nbsp;a computational diffusion phantom, a watery solution phantom\&nbsp;and a set of voluntary patients. Diffusion estimation\&nbsp;accuracy has been directly calculated on the computational\&nbsp;phantom and indirectly by means of a residual analysis on\&nbsp;the real data. On the other hand, effectiveness in distortion\&nbsp;correction has been measured on the phantom. Results have\&nbsp;shown statistical significant improvements compared to pairwise\&nbsp;registration being able to cope with elastic deformations.</p>
},
	author = {Santiago Sanz-Est{\'e}banez and {\'O}scar Pe{\~n}a-Nogales and Rodrigo de Luis-Garc{\'\i}a and Santiago Aja-Fern{\'a}ndez and Carlos Alberola-Lopez}
}
