MRI is not useful in diagnosis of hypercalcemia. However, MRI may be helpful in the diagnosis of  causes of hypercalcemia including hyperparathyroidism, renal cell carcinoma, and lung cancer.
Hypercalcemia MRI
Hypercalcemia CT
Hypocalcemia physical examination
Hypocalcemia CT
Hypercalcemia echocardiography or ultrasound
Hypercalcemia x ray
Hypoparathyroidism x ray
Hyperparathyroidism MRI