On average, 0.74 mL of contrast fluid was infused with a velocity of 0.01 mL/s.
Activation results in 1.3 ml of contrast.
Therefore, the small amount of 5 ml of contrast media resulted in an appropriate contrast-to-noise ratio.
The CT protocol was: unenhanced CT scan; CE-CT after intravenous injection of 1 ml of contrast material using a small-animal injection pump (Medtron, Saarbrücken, Germany).
In patients with moderately impaired renal function (stage 3 A, GFR = 45 60), bolus tracking with 75 ml of contrast at 4 5 ml/s is used.
Portograms were obtained with injection of 10 ml of contrast (RadialarⓇ 280 mg/ml, Juste SAQF, Madrid, Spain) into the hand.
In patients with moderately reduced renal function (Stage 3 B, GFR = 30 44) 30 ml of contrast with bolus tracking from SVC, preferably on the 256 slice MDCT is used.
Arterial enhancement in studies performed with a 64-slice scanner demonstrates more consistency with the bolus injection technique, but requires higher contrast volume (typically an additional 20 ml of contrast medium).
For a patient of 75 kg, a typical CT coronary angiogram would be performed with about 60-100 ml of contrast agent (depending on the CT system generation used).
Intravenous administration of 50 70 ml of contrast agent, followed by a 50/50 mixture of contrast and saline, is used to reduce streak artefacts from the superior vena cava (SVC).
CT-perfusion scanning was delayed by 3 s after the start of the injection of 40 mL of contrast medium (CM; Ultravist 370, Bayer Healthcare, Leverkusen, Germany) at 4.5 mL/s.
