Proton MR properties of lyophilized urine samples from normal and stone former individuals

Abstract Proton MR measurements were performed in lyophilized urine samples collected from 5 normals (N) and 5 idiopathic hypercalciuric recurrent stone formers (SF). T 1 and T 2 relaxation times were measured with a Bruker PC Multispec at 20 MHz and 37°C in the lyophilized samples and in samples gradually rehydrated. Significantly (p T 1 and T 2 relaxation times were measured after addition of water to the lyophilized samples. The relaxation time prolongation patterns were significantly different (p In calculations of water compartmentalization for similar water content, significant (p