Figure 1. A 51-year-old man with an insulinoma in the tail of the pancreas, showing the commonest signal intensity changes for islet sell tumours on the various MR sequences. (a) The T₁ weighted spin echo image (TR/TE 500/14 ms) shows the typical low signal intensity pattern (curved black arrow). (b) On the T₂ weighted fast spin echo image (TR/TE 6315/105 ms) the insulinoma (curved black arrow) shows typical high signal intensity for this sequence. (c) The fat saturated axial T₁ weighted spin echo image (TR/TE 500/14 ms) shows the characteristic high signal ofthe pancreatic parenchyma using this sequence, resulting in increased conspicuity of the insulinoma (arrow). (d) Following iv gadolinium, the insulinoma (curved white arrow) shows enhancement greater than the pancreatic parenchyma on the fat saturated axial T₁ weighted spin echo image (TR/TE 500/14 ms). Note adjacent splenic enhancement. (e) CT shows a vascular lesion (open arrow) with rim calcification, a feature not appreciated on MRI.