A bone scan is a nuclear medicine (scintigraphic) study that makes use of Technetium 99m (commonly Tc99m-methylene diphosphonate (MDP)) as the active agent.
The study has three stages which follow intravenous injection of the tracer.
- malignancy : detection and follow-up of skeletal metastases
- detection of radiographically occult fractures
- reflex sympathetic dystrophy
- hip joint prosthesis : evaluation for infection or loosening
- remove metal objects
- void immediately before study
Tracer dose and route of administration
- 2 to 5-sec images are obtained for 60 seconds after injection
- demonstrates perfusion and characterises the blood flow to a particular area
Blood pool phase
- the blood-pool image is obtained 5 min after injection
- demonstrated the blood pool, not the blood flow
- inflammation causes capillary dilatation and increased blood flow
If the study is going to be a triphasic bone scan, a third phase is added.
- the bone image is obtained 2 - 4 hours later
- urinary excretion has decreased the amount of the radionuclide in soft tissue
Synonyms & Alternative Spellings
|Synonyms or Alternative Spelling||Include in Listings?|
|Triphasic bone scan||✗|