Anisotropic field-of-view support for golden angle radial imaging.

ABSTRACT:

Purpose

To provide anisotropic field-of-view (FOV) support for golden angle radial imaging.

Theory and methods

In radial imaging, uniform spoke density leads to a circular FOV, which is excessive for objects with anisotropic dimensions. Larson et al previously showed that the angular k-space spoke density can be determined by the desired anisotropic FOV. We show that conventional golden angle sampling can be deployed in an angle-normalized space and transformed back to k-space such that the desired nonuniform spoke density is preserved for arbitrary temporal window length. Elliptical FOVs were used to illustrate this generalized mapping approach. Point-spread-function and spoke density analysis was performed. Phantom and in vivo cardiac images were acquired.

Results

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SUBMITTER: Wu Z 

PROVIDER: S-EPMC4766068 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature