Roboradiology
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Isotope Bone Scans Bone scans are usually undertaken using diphosphonates labelled with 99 metastable Technetium. (more details ?) This is injected intravenously. Early perfusion scans can be taken immediately after injection using the Gamma camera. More commonly the scans are obtained 4 hours after injection. The normal skeleton is demonstrated on bone scans due to uptake of diphosponates by the osteoblasts which are constantly replacing and remodelling bone. The normal skeleton should be completely symmetrical. Asymmetry should be regarded with suspicion. In addition there is excretion via the renal tract and the kidneys and bladder are seen on normal scans and frequently some urine staining of underwear. |
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