The only nuclear medicine procedure i know for imaging the pituitary gland, a rather exotic one, ist I-123 IBZM (iodobenzamide) SPECT in prolactinomas. in general, pituitary diseases are investigated with MRI. but Tc-99m MIBI can visualise the parathyroid glands.
Excessive use of magnesium supplements can be toxic. The upper limit -- the highest dose a person can take -- of magnesium supplements is: 65 mg/day for children ages 1-3. 110 mg/day for children ages 4-8. 350 mg/day for adults and children ages 9 and up.
Oral dosage (magnesium chloride, magnesium gluconate, magnesium lactate, magnesium oxide, or magnesium sulfate): Children: 10â20 mg elemental magnesium/kg/dose PO four times per day. Parenteral dosage (magnesium sulfate): Adults: 1â2 g IV/IM (or 15â30 mg/kg lean body weight) every 6 hours for 24 hours. Use the higher end of the dosage range for serum Mg concentrations < 1.2 mg/dl. For extreme hypomagnesemia, 8â12 g/day IV in divided doses have been used.