Contrast-enhanced 3D MR breathhold imaging of porcine coronary arteries using fluoroscopic localization and bolus triggering.
The purpose of this study was to develop cardiac-gated contrast-enhanced 3D MRA for imaging the coronary arteries of pigs. Each major coronary artery was imaged individually in a single 3D slab in one breathhold. To permit acquisition within a breathhold, a limited number of partitions (12-16) were collected in a single, oblique, thin 3D slab. Typical resolution of the acquisition was 0.8 (X) x 1.6 (Y) x 1.6 (Z) mm. MR fluoroscopic localization was used to establish the 3D double-oblique orientation. Real-time MR fluoroscopy was also used to instantaneously trigger the 3D scan after detection in the aortic root of the intravenously administered contrast bolus. Six pigs were used in the study. Each pig was scanned on two separate days. Images routinely show the majority of the length of the three principal coronary arteries. Magn Reson Med 42:1159-1165, 1999.
Kruger
D G
DG
Magnetic Resonance Research Laboratory, Mayo Clinic, Rochester, MN 55905, USA. riederer@mayo.edu
Busse
R F
RF
Johnston
D L
DL
Ritman
E L
EL
Ehman
R L
RL
Riederer
S J
SJ
D000818:Animals; D003287:Contrast Media; D003331:Coronary Vessels / Q000033:anatomy & histology*; D005471:Fluoroscopy; D019786:Gadolinium DTPA; D007091:Image Processing, Computer-Assisted; D018810:Magnetic Resonance Angiography / Q000379:methods*; D013552:Swine
D003287:Contrast Media; D019786:Gadolinium DTPA