1 code implementation • 23 Dec 2020 • Teddy X. Cai, Nathan H. Williamson, Velencia J. Witherspoon, Rea Ravin, Peter J. Basser
The method extends the Carr-Purcell-Meiboom-Gill (CPMG) cycle under a static field gradient by discretely incrementing the $\pi$-pulse spacings to simultaneously avoid off-resonance effects and probe a range of timescales ($50 - 500$ microseconds).
no code implementations • 6 Jun 2017 • Jian Cheng, Peter J. Basser
2) We propose Orientational Order (OO) and Orientational Dispersion (OD) indices to describe the degree of alignment and dispersion of a spherical function in a single voxel or in a region, respectively; 3) We also show how to construct a local orthogonal coordinate frame in each voxel exhibiting anisotropic diffusion; 4) Finally, we define three indices to describe three types of orientational distortion (splay, bend, and twist) in a local spatial neighborhood, and a total distortion index to describe distortions of all three types.
no code implementations • 10 Oct 2015 • Cheng Guan Koay, Ping-Hong Yeh, John M. Ollinger, M. Okan İrfanoğlu, Carlo Pierpaoli, Peter J. Basser, Terrence R. Oakes, Gerard Riedy
The purpose of this work is to develop a framework for single-subject analysis of diffusion tensor imaging (DTI) data.