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Abstract #4086

Multi-Readout Diffusion-Weighted Imaging for Studying Coupling between Apparent Diffusion Coefficient and Echo Time

Kaibao Sun1, Guangyu Dan1,2, Zheng Zhong1,2, and Xiaohong Joe Zhou1,2,3
1Center for MR Research, University of Illinois at Chicago, Chicago, IL, United States, 2Department of Bioengineering, University of Illinois at Chicago, Chicago, IL, United States, 3Departments of Radiology and Neurosurgery, University of Illinois at Chicago, Chicago, IL, United States

The dependence of apparent diffusion coefficient (ADC) on echo time (TE) has been observed in a number of biological tissues. Such coupling can be exploited to extract tissue microstructural information. We herein introduce a time-efficient sequence that is capable of studying the interplay between ADC and TE. The sequence incorporated multiple echo-train readouts into diffusion-weighted echo planar imaging, together with a 2D RF excitation pulse to reduce the FOV, thereby allowing multiple effective TEs in an acquisition. With this sequence, ADCs were evaluated at three TEs and T2*s at three b-values. The proposed technique has been demonstrated in the prostate.

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