Which of the following is accomplished with pulsed fluoroscopy?

• A. Longer tube life
• B. Increased image resolution
• C. Decreased patient dose
• D. Higher dose per pulse

Answer: (C)

Pulsed fluoroscopy delivers radiation in short bursts rather than a continuous stream. This reduces the total exposure time, so the patient receives less radiation for the same exam. You can maintain enough temporal information for motion visualization by adjusting the pulse rate, but the dose per second is lowered because the tube is energized only part of the time. The primary outcome of using pulsed fluoroscopy is decreased patient dose. It doesn’t inherently increase image sharpness or spatial resolution, and it isn’t about increasing the dose per pulse; those effects aren’t the goal of this technique.