Optimal protocol for injection of contrast material at MR angiography: Study of healthy volunteers

Forty healthy volunteers, matched for age and body weight, underwent abdomi nal magnetic resonance angiography with gadopentetate dimeglumine administe red by using a power injector. Injection rates were 0.3, 1.0, 2.0, or 3.0 m L/sec. Contrast material doses were 0.1 (single dose) or 0.2 (double dose) mmol/kg. increased contrast enhancement high flow rate and minimum arteriov enous overlap can be achieved with high flow rate and double-dose injection .