Items tagged “nuclear medicine”
70 results found
Tc-99m MAA (macroaggregated albumin) is one of the technetium radiopharmaceuticals used in lung perfusion imaging. Characteristics photon energy: 140 KeV physical half life: 6 hours biological half life: 2-3 hours normal distribution: lungs, liver, spleen, kidneys pharmacokinetics: >90% p...
Scintigraphy performed with Tc-99m labeled RBCs
Tc-99m labeled RBCs - with radiolabelling technique in vivo or in vitro of red cells 3 - is one of the technetium radiopharmaceuticals used in the non-invasive assessment of gastrointestinal (GI) bleeding 2, characterized by high sensitivity (93%) and specificity (95%) 4. It is capable, in fact,...
Tc-99m sestamibi (sestamibi is a shortening of sesta-methoxyisobutylisonitrile) is one of the technetium radiopharmaceuticals. Characteristics photon energy: 140 KeV physical half-life: 6 hours lipophilic cation normal distribution: thyroid, parathyroid, heart (myocardium) excretion: hepat...
Tc-99m DTPA (aerosol)
Tc-99m DTPA (diethylenetriamine-pentaacetic acid) (aerosol) is one of the technetium agents and is used in VQ imaging. Characteristics photon energy: 140 KeV physical half life: 6 hours biological half life: 1 hour normal distribution: lungs pharmacokinetics: aerosol deposited in bronhoal...
Graves disease (thyroid scintigraphy)
Published 28 Feb 2013
Ioflupane (I-123) is a radiopharmaceutical for the diagnosis of Parkinson disease and its differential diagnoses: essential tremor versus tremor due to parkinsonian syndromes (idiopathic Parkinson disease, multiple system atrophy and progressive supranuclear palsy). Characteristics iodine-...
Parathyroid adenomas are benign tumors of the parathyroid glands and are the most common cause of primary hyperparathyroidism. Clinical presentation Patients typically present with primary hyperparathyroidism: elevated serum calcium levels and elevated serum parathyroid hormone levels. This re...
Abdominal aortic aneurysm (incidental finding on renal scintigraphy)
Published 23 Jul 2013
Radioisotope spills are classified as major or minor. Examples of major spills include quantities equal to or larger than: 1mCi I-131 100 mCi Tc-99m or Tl-201 10 mCi Ga-67, In-111, or I-123
Gallium-67 (Ga-67) is a photon-emitting radiotracer used for scintigraphy which is used in the form of various salts like citrate and nitrate. Once administered, imaging may consist of planar (2 dimensional), SPECT, and SPECT-CT acquisitions. Once injected it binds to plasma proteins (especially...
Positron emission tomography
Positron emission tomography (PET) is a modern non-invasive imaging technique for quantification of radioactivity in vivo. It involves the intravenous injection of a positron-emitting radiopharmaceutical, waiting to allow for systemic distribution, and then scanning for detection and quantificat...
SPECT vs PET
Single photon emission computed tomography (SPECT) and positron emission tomography (PET) are nuclear medicine imaging techniques which provide metabolic and functional information unlike CT and MRI. They have been combined with CT and MRI to provide detailed anatomical and metabolic informatio...
Transient ischemic dilatation
Published 29 Oct 2014
Postoperative assessment after thyroid cancer surgery
Postoperative assessment after thyroid cancer surgery is performed in the surgical bed and regional lymph nodes, looking for possible recurrence of disease. Radiographic features Ultrasound usually performed in first 6-12 months, and then as needed by the patient's risk factors 1 suspicious ...
Diagnosis not applicable
Published 28 Apr 2015
Renal osteodystrophy - metabolic superscan
Published 12 Aug 2015
SeHCAT™ (23-seleno-25-homo-tauro-cholic acid or tauroselcholic acid) is a radiopharmaceutical used in the investigation of bile salt malabsorption, which is a cause of chronic diarrhea. Characteristics physical half-life: 118 days Uses, dosage and timings A capsule containing SeHCAT is inge...
Normal V/Q scan
Diagnosis not applicable
Published 23 Dec 2015
Iodine-131 (131I or I-131) is a radioisotope of iodine, which is used in the diagnosis, treatment and theranostic approach (diagnostic scan and radionuclide therapy 3 ) of thyroid lesions. It is one of the oldest radiotracers used in nuclear medicine, in use for over 50 years. It is predominate...
Indium-111 OncoScint is a radiopharmaceutical used in SPECT imaging. It is a labeled monoclonal antibody that is directed against TAG-72, which is a tumor-associated antigen associated with ~95% of colorectal carcinomas and 100% of ovarian carcinomas 1,2. Background hepatic uptake limits sensiti...