Estimation of abdominal subcutaneous fat volume of obese adults from single-slice MRI data - Regression coefficients and agreement.

•Abdominal subcutaneous fat volume is a promising non-invasive marker of obesity.•Slice-based estimation by MRI or CT is common and feasible but poorly standardized.•Coefficients of regression and determination have been determined systematically.•Disc spaces L5/S1, L4/L5 or the umbilicus are superior to other single-slice landmarks.•Extension to five slices yielded a moderate improvement of the accuracy only.