An illustration of adipocytes distribution within single MRI voxel of parenchymal tissues of pancreas.

Histological section of background normal pancreatic tissue of a 48-year female undergoing pancreatectomy for a neuroendocrine tumour. The average size of single adipocyte is approximately 100μm, but adipocytes can occur in clusters. Based on average adipocyte size of 100μm, the maximum number of adipocytes likely to be present in one voxel is ~400x50 = 20000 adipocytes. The upper threshold of 20% assumes that the maximum number to be 4000 adipocytes within a single voxel of pancreas.