Imajo et al1 have undertaken the important task of analyzing non invasive surrogates for pathologically assessed liver fibrosis and steatosis.1 Regarding fibrosis, Bedossa et al2 are amongst those who have noted the “urgent need” for doing so and mention that magnetic resonance (MR) imaging is promising. They point out weakness of liver histology pertaining to fibrosis and note the limitations inherent when treating it as a gold standard. These points apply to a large extent to today’s burgeoning field of liver fat quantification.