Available techniques to measure in-vivo bowel permeability are inadequate for stratifying patients to identify those at risk of complications from increased bowel permeability. T1 and T2 measurements could potentially be indicators of changes in bowel wall structure and thus permeability. We have measured the T1 and T2 of the bowel wall to be 1.68±0.57 s and 0.08 ±0.02 s respectively. We found significant variations between and within subjects. However it is currently unknown whether some of these variations are real and some due to errors in the measurement process.