In addition to its use in precontrast T1-weighted imaging, SGE sequences are routinely used for multi-phase image acquisition after intravenous administration of gadolinium contrast agents for investigation of the liver, spleen, pancreas, and kidneys.
An important feature of the multisection acquisition of SGE images is that the central
phase-encoding steps are generally used to fill the central k-space, which determines image contrast. This contrast component of the dataset is acquired over a 4-5 sec period for the entire dataset, and is essentially shared by each individual section. As a
result, data acquisition is sufficiently short for the entire dataset to isolate a distinct phase of enhancement (e.g., hepatic arterial dominant phase). This ensures that images of organs, such as liver, are shown in the same phase of contrast enhancement
uniformly throughout the volume of the tissue.