Bias, Repeatability and Reproducibility of Liver T Mapping With Variable Flip Angles.

Background: Three-dimensional variable flip angle (VFA) methods are commonly used for T mapping of the liver, but there is no data on the accuracy, repeatability, and reproducibility of this technique in this organ in a multivendor setting.

Purpose: To measure bias, repeatability, and reproducibility of VFA T mapping in the liver.

Study Type: Prospective observational.

Bias and Precision in Magnetic Resonance Imaging-Based Estimates of Renal Blood Flow: Assessment by Triangulation.

Background: Renal blood flow (RBF) can be measured with dynamic contrast enhanced-MRI (DCE-MRI) and arterial spin labeling (ASL). Unfortunately, individual estimates from both methods vary and reference-standard methods are not available. A potential solution is to include a third, arbitrating MRI method in the comparison.