Technetium Tc 94m Sestamibi

**Semantic type:** Pharmacologic Substance

**Definition:** A radioconjugate consisting of sestamibi labeled with the positron-emitting isotope Tc 94m. Sestamibi is a synthetic molecule of the isonitrile family that diffuses through cell membranes and may preferentially accumulate within mitochondria. Technetium Tc 94m sestamibi may be used in tumor-imaging studies utilizing positron emission tomography (PET). (NCI05)

**Synonyms:** - technetium Tc 94m sestamibi