Planar parathyroid localization scintigraphy: a comparison of subtraction and 1-, 2- and 3-h washout protocols.

Introduction: With the advent of minimally invasive surgery to treat hyperparathyroidism, preoperative imaging of parathyroid glands has become routine practice. Scintigraphy and ultrasound are the two most common imaging techniques. Despite this, published sensitivities for scintigraphy vary enormously, and there is a multitude of protocols performed.