-  Withdraw steroids when evaluating possible Cushing’s disease. Avoid excesive salt intake, oral contraceptives, diuretics, metyrapone, aminoglutethimide, antihypertensive agents

-  Fasting overnight or for 8 h before injection.

-  Use dexamethasone supression in cases with aldosterone or androgens increased secretion.

-  Administer lugol’s solution 1 drop 2-3 times a day, 3 days before and 7 days after injecting the radiotracer to prevent free iodine uptake by the thyroid gland.

-  Mild colonic laxatives 2-3 days before imaging.

References:

1  Diez L, Mitjavila M, Tumores Neuroendocrinos: estudios con meta-yodo-bencil-guanidina, p: 549-561 in: Medicina Nuclear Aplicaciones Clínicas. Eds: I. Carrio - P. González. Editorial Masson, Barcelona España, 2003.

2  Hay RV, Scintigraphic Imaging of the Adrenals and Neuroectodermal Tumors, in Henkin RE et al. Nuclear Medicine. Mosby St Louis 1996, p 855-876.