(redirected from Tc-99m)


A radioactive isotope of technetium having a half-life of 6 hr, in which the “m” refers to the fact that it is a metastable isotope.. 99mTc is used in nuclear medicine for a wide variety of diagnostic tests and imaging studies, e.g., myocardial perfusion scans, bone scans, and V/Q scans..

technetium Tc 99m albumin aggregated injection

An injection of technetium-99m that has been aggregated with albumin. It is used intravenously to scan the lungs.

technetium Tc 99m hexamethylpropyleneamine oxime

Abbreviation: HMPAO
A radioactive tracer consisting of technetium-99m linked to hexamethylpropyleneamine oxime. It is used to make nuclear imaging scans of the brain, e.g., in the determination of brain death. Absence of uptake of the molecule by the brain is diagnostic of brain death.

technetium 99m (methoxyisonitrile) MIBI

A radioactive tracer consisting of technetium-99m linked to MIBI. It is used in nuclear medical imaging (e.g., in scintimammography) to identify cancerous breast masses. Other uses of technetium 99m MIBI include cardiac, parathyroid, and thyroid imaging.

technetium Tc 99m methylene diphosphonate

A radioactive tracer consisting of technetium-99m linked to methylene diphosphonate. It is used in nuclear medicine to obtain images of bone and bone diseases, e.g., fractures not seen on plain x-rays, malignancies, and osteomyelitis.

technetium Tc 99m RBC

A radioactive tracer consisting of technetium-99m linked to red blood cells. It is used in clinical medicine to evaluate occult bleeding, e.g., from the gastrointestinal tract, or the motion of the heart in gated blood pool imaging.
Synonym: red blood cell scan

technetium Tc 99m sestamibi

A radioactive tracer consisting of technetium-99m linked to sestamibi. It is used to image blood flow to the heart muscle, esp. when combined with exercise or pharmacological “stress” tests. In a heart with normal blood flow, the isotope should be taken up uniformly throughout the heart muscle. Decreased uptake by regions of the heart occurs when coronary artery blood flow to those regions is blocked, e.g., by atherosclerotic plaque. Synonym: sestamibi

technetium Tc 99m sulfur colloid

A radioactive tracer consisting of technetium-99m linked to sulfur colloid. It is used in nuclear medicine scans to make images of gastric emptying or of the lymph nodes, liver, and spleen.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
The RadioGenix System is an innovative, high tech separation platform that is approved for processing non-uranium/non-highly enriched uranium based molybdenum-99 (Mo-99) for the production of the important medical radioisotope, technetium-99m (Tc-99m).
Grubumuz tarafindan gerceklestirilen bir diger calismada ise sentezlenen manyetik nanoparcaciklarin guanin ile konjugasyonunun ardindan Tc-99m trikarbonil koru ile radyoisaretlenmesi saglanmistir.
Mo-99 is the parent isotope of Technetium-99m (Tc-99m), the most widely used radioisotope in medical diagnostic imaging worldwide.
SLN mapping was performed after the intradermal injection of 40 MBq of Tc-99m Nano-Colloid at 2 sites adjacent to excision scar in right vulva.
Differential uptake of Tc-99m DMSA and Tc-99m EC in renal tubular disorders: Report of two cases and review of the literature.
The imaging studies used to diagnose ECD are radiographs and Tc-99m MDP Bone Scintigraphy.
The meeting urged the ministry to take steps to collect new chemicals to produce Tc-99m Cold kit in international standard.
This new medical isotope technology is expected to provide a reliable domestic supply of Mo-99 and Tc-99m for North America, which supports the U.S.
Food and Drug Administration (FDA) has approved the RadioGenix System, an innovative, high tech radioisotope separation platform indicated for use in producing the widely used medical radioisotope technetium- 99 (Tc-99m) from NorthStar's non-uranium based molybdenum- 99 (Mo-99).
M2 EQUITYBITES-February 9, 2018-NorthStar Medical Radioisotopes wins US FDA and NRC's approval for first domestic supply of medical isotope Tc-99m in diagnostic imaging