Which scans utilize Tc bicisate (ECD)?

• A. Bone scans
• B. Brain perfusion for cerebral artery disease
• C. Thyroid scans
• D. Pelvic scans

Answer: (B)

The use of Tc bicisate (also known as ECD or ethyl cysteinate dimer) is specifically indicated for brain perfusion imaging. This radiopharmaceutical is designed to assess cerebral blood flow, making it particularly valuable in diagnosing and evaluating conditions such as cerebral artery disease and other neurovascular disorders.

Its chemical properties allow Tc bicisate to permeate the blood-brain barrier, providing clear images of brain activity and blood supply. In brain perfusion scans, the distribution of blood flow in the brain is monitored, which helps in identifying areas of reduced perfusion or ischemic damage.

While other options such as bone scans and thyroid scans involve different radiopharmaceuticals specifically suited to target bone or thyroid tissue, respectively, Tc bicisate is tailored for evaluating cerebral perfusion, which directly correlates to the blood flow dynamics within the brain. Therefore, its application in brain perfusion imaging distinguishes it from the other imaging uses listed.