Abstract #2049

Periodic Sampling in the Gradient Direction Domain Facilitates Noise Reduction in Diffusion Weighted Imaging

Farshid Sepehrband¹, Jeiran Choupan¹, Viktor Vegh¹, Quang M. Tieng¹, David C. Reutens¹, Zhengyi Yang²

¹Centre for Advanced Imaging, The University of Queensland, Brisbane, Queensland, Australia; ²School of Information Technology and Electrical Engineering, The University of Queensland, Brisbane, Queensland, Australia

We have proposed a new sampling scheme for Higher Angular Resolution Diffusion Imaging. The scheme is based on sampling the diffusion gradient directions periodically in a spiral over the unit sphere. Diffusion signal acquired with this scheme inherits the periodicity of the sampling, which brings post-processing opportunities for diffusion MRI data, such as denoising, compressed sensing and tractography. Here we have demonstrated its effect on signal-to-noise improvement.