Pushing CT and MR Imaging to the Molecular Level for Studying the “Omics”: Current Challenges and Advancements
Figure 4
(a) AUTO-SMASH or VD-AUTO-SMASH reconstruction process for the acceleration rate of 2. Each -line in a single coil was composited to fit the ACS line, and the relationship was applied to fill in the missing -lines. The procedures constructed the whole -space and then the reconstructed images were obtained. SMASH did not additionally acquire ACS. It used the estimated coil sensitivities to composite the missing data. (b) GRAPPA used multiple lines from all coils to fit a line in one coil. The reconstructed images from each coil were obtained after the -space acquired from each coil was fully restored. The uncombined images were merged using sum of squares or other adaptive algorithms. The concept of reconstruction block made GRAPPA flexible using different “blocks” to fit the ACS lines for better performance. For example, at least there were three blocks used for ACS lines fitting, which would provide a more accurate outcome.
