What is the primary reason for using pulsed fluoroscopy mode over continuous fluoroscopy during a procedure?

• A. To reduce radiation exposure
• B. To improve spatial resolution
• C. To increase fluoroscopy time
• D. To enhance image brightness

Answer: (A)

Reducing radiation exposure is the main reason pulsed fluoroscopy is used. By turning the X-ray beam on only for brief intervals, the total energy delivered to the patient (and staff) over a procedure drops, even if image quality stays diagnostic through processing and frame-rate choices. Pulsing controls how long the beam is active (the duty cycle), so lower pulse rates mean less dose overall. This isn’t about improving spatial resolution or inherently brightening the image; brightness is adjusted by dose per pulse and display settings, and higher frame rates would raise dose rather than improve safety.