DPD scan (original) (raw)

A DPD scan is a type of nuclear medicine imaging test which uses radioactive technetium-99m (99mTc) and 3,3-diphosphono-1,2-propanodicarboxylic acid (DPD) to diagnose cardiac amyloidosis. The radiopharmaceutical is taken up only in patients with ATTR amyloidosis, making it a useful tool to differentiate from AL amyloidosis. DPD is a diphosphonate and can be used as an alternative to HDP or MDP in nuclear medicine bone scintigraphy.