Items tagged “nuclear medicine”
84 results found
Article
Tc-99m MAA
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...
Article
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,...
Article
Tc-99m sestamibi
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)
e...
Article
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...
Case
Graves disease (thyroid scintigraphy)
Published
28 Feb 2013
69% complete
Nuclear medicine
Article
Ioflupane (I-123)
Ioflupane (I-123) is a radiopharmaceutical for the diagnosis of Parkinson disease and its differential diagnoses, e.g. essential tremor versus tremor due to parkinsonian syndromes (idiopathic Parkinson disease, multiple system atrophy and progressive supranuclear palsy).
Characteristics
iodin...
Article
Parathyroid adenoma
Parathyroid adenomas are benign tumors of the parathyroid glands and are the most common cause of primary hyperparathyroidism.
Epidemiology
Associations
There is an association with multiple endocrine neoplasia types I (MEN1) and IV (MEN4).
Clinical presentation
Patients typically present w...
Case
Abdominal aortic aneurysm (incidental finding on renal scintigraphy)
Published
23 Jul 2013
75% complete
Nuclear medicine
CT
Article
Radioisotope spills
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
Article
Gallium-67 scintigraphy
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...
Article
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...
Article
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...
Case
Transient ischemic dilatation
Published
29 Oct 2014
88% complete
Nuclear medicine
Article
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 ...
Case
Alpha decay
Published
28 Apr 2015
35% complete
Diagram
Case
Renal osteodystrophy - metabolic superscan
Published
12 Aug 2015
82% complete
Nuclear medicine
X-ray
Article
SeHCAT
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...
Case
Normal V/Q scan
Published
23 Dec 2015
54% complete
Nuclear medicine
Article
Iodine-131
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...
Article
Indium-111 OncoScint
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...