Non-Cartesian MRI Scan Time Reduction through Sparse Sampling

摘要

Magnetic resonance imaging (MRI) signals are measured in the Fourier domain, alsocalled k-space. Samples of the MRI signal can not be taken at will, but lie along k-space trajectories determined by the magnetic field gradients. MRI measurements are usually Cartesian, where the trajectories are parallel and equidistant and sampling along the trajectories is also equidistant. This allows fast reconstruction using the inverse Fast Fourier transform (IFFT). However, this thesis focuses on non-Cartesian MRI.