This study was performed using a low-field MRI scanner. Because of the relatively poor spatial resolution of MRI scanners, voxels within images contained information from different cells. We hypothesised that cells within a voxel were similar and belonged to a specific tissue. The spatial resolution of 1mm2 in the image plane was determined as a compromise between the signal to noise ratio and the acquisition time. It can be increased by using scanners operating at higher magnetic field strengths. However, T1 differences between tissues would be reduced as the sensitivity of
T1 to molecular interaction is less pronounced at higher frequencies. Furthermore, the accuracy of T2 measurements decreases for the higher magnetic field strength because of the magnetic susceptibility effects. A compromise has therefore to be made.