Figure 2:

Gadoxetate-enhanced abbreviated MRI interpretation. A–D, Examples of definitely benign observations, as called by the interpreting radiologist; arrows = well-circumscribed markedly hypointense observations on, A, B, T1-weighted hepatobiliary phase (T1w HBP) images which correspond to markedly T2 hyperintense observations on, C, D, T2-weighted single-shot fast spin-echo (T2w SSFSE) images, compatible with benign cysts. E–G, Example of subthreshold observation; an 8-mm observation in the lateral section is moderately hypointense, E, on the T1-weighted HBP image, mild to moderately hyperintense, F, on the T2-weighted SSFSE and demonstrates high signal, G, on diffusion-weighted imaging (DWI), suggesting restricted diffusion. Because the observation is smaller than 10 mm, it qualifies the study as subthreshold. H–J, Example of positive observation; a 16-mm observation in the lateral section is moderately hypointense, H, on the T1-weighted HBP image, mildly to moderately hyperintense, I, on the T2-weighted SSFSE image and demonstrates high signal at DWI, suggesting restricted diffusion, I . Because the observation is greater than or equal to 10 mm in size, it qualifies the study as positive. Note that our current clinical practice is to consider only HBP T1-weighted hypointense observations and/or DWI-hyperintense observations as grounds for a subthreshold or positive scoring after exclusion of benign entities. T1-weighted HBP = T1-weighted three-dimensional gradient-echo fat-suppressed imaging acquired 20 minutes following administration of 0.025 mmol/kg gadoxetic disodium, T2-weighted SSFSE = T2-weighted single-shot fast spin-echo imaging.