Radiology, Vol 146, 669-676, Copyright © 1983 by Radiological Society of North America
Low-dose, high-frame-rate versus regular-dose, low-frame-rate digital subtraction angiography
DR Enzmann, WT Djang, SJ Riederer, WF Collins, A Hall, GS Keyes and WR Brody
Using intravenous digital subtraction angiography for carotid, cerebral,
and renal arteries, a comparison was made between a single pulsed image and
an integrated image composed of several pulsed images. The single image was
generated with a conventional detected dose per frame while the frames
composing the integrated image were generated at a lower dose per frame but
at a higher frame rate. Comparisons were made for an equivalent detected
dose per image. For relatively stationary arteries, the integrated images
were equivalent or superior to the single images. When patient motion was
present, or if pulsatile vessel motion was significant, the single image
was better than the integrated image. A low-dose, high-frame-rate technique
has the potential for furnishing physiologic data in addition to
high-quality morphologic information.
