Pulsed fluoroscopy / fluorography
In pulsed fluoroscopy the x-ray beam is rapidly switched on and off, as
compared with conventional fluoro where the beam is on continuously.
A pulsed mA with a short pulse width
ms) captures motion or flow
with minimal blur (1 image per pulse).
lower mA pulses are used
producing much lower dose rates and
“grainier” images than fluorography. How-
ever, dose rates significantly lower than
even continuous fluoro can be achieved
when pulse rates < 30 pps are used.*
Richard H. Behrman, PhD
(cine, DA, DSA) high
tube currents (mA) are used to produce
high quality images. These “record mode”
images are for diagnosis and are usually
stored for replay and documentation.
* Since fluoro is primarily used for image guidance and positioning, lower dose rates and
therefore lower quality images are tolerated.