Rational approximation of golden angles: Accelerated reconstructions for radial MRI.

ABSTRACT:

Purpose

To develop a generic radial sampling scheme that combines the advantages of golden ratio sampling with simplicity of equidistant angular patterns. The irrational angle between consecutive spokes in golden ratio-based sampling schemes enables a flexible retrospective choice of temporal resolution, while preserving good coverage of k-space for each individual bin. Nevertheless, irrational increments prohibit precomputation of the point-spread function (PSF), can lead to numerical problems, and require more complex processing steps. To avoid these problems, a new sampling scheme based on a rational approximation of golden angles (RAGA) is developed.

Methods

The theoretical properties of RAGA sampling are mathematically derived. Sidelobe-to-peak ratios (SPR) are numerica

SUBMITTER: Scholand N 

PROVIDER: S-EPMC12034029 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature