What does the power injector flow rate setting specify?

What does the power injector flow rate setting specify?

• A. The number of mL per second injected
• B. The total contrast volume per injection
• C. The duration of injection
• D. The maximum contrast concentration

Answer: (A)

Flow rate is the pace at which contrast is pushed into the vein, expressed as milliliters per second. This setting determines how fast the injector delivers the contrast during the injection, which directly influences the bolus shape and the timing of peak enhancement. If you want a faster, sharper bolus, you increase the flow rate; a slower rate gives a more gradual bolus. The total amount of contrast delivered is not fixed by the flow rate alone—it equals flow rate multiplied by the injection duration, so changing either value changes the total dose. The duration of the injection is a separate setting that tells the injector how long to run, while the maximum concentration depends on the contrast’s concentration and dilution, not solely on the flow rate.

Flow rate is the pace at which contrast is pushed into the vein, expressed as milliliters per second. This setting determines how fast the injector delivers the contrast during the injection, which directly influences the bolus shape and the timing of peak enhancement. If you want a faster, sharper bolus, you increase the flow rate; a slower rate gives a more gradual bolus. The total amount of contrast delivered is not fixed by the flow rate alone—it equals flow rate multiplied by the injection duration, so changing either value changes the total dose. The duration of the injection is a separate setting that tells the injector how long to run, while the maximum concentration depends on the contrast’s concentration and dilution, not solely on the flow rate.