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The ferromagnetism, and therefore the safety in a magnetic resonance (MR) examination, of the most widely available air gun pellets has been tested. While many are made of lead and are not ferromagnetic, some contain steel and are deflected strongly in a magnetic field. There must therefore be careful consideration before undertaking MR examinations of patients with embedded air gun pellets.
MRI intravenous contrast enhancement of inflammatory synovium has been studied at two different doses to determine to what extent enhancement is dose dependent. 19 patients with clinically active rheumatoid arthritis involving a knee were scanned twice, one week apart, using 0.1 mmol/kg of gadoteridol (ProHance®) on the first occasion and 0.3 mmol/kg on the second. Static pre-and post-contrast images...
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