[Real-time MRI with radial k-radial scanning technique for control of angiographic interventions].
OBJECTIVE
To test the feasibility of real-time MR controlled guidance of field-inhomogeneity catheters in vitro and in vivo as a first step to MR-guided angiographic interventions.


METHODS
Applying a combination of radial scanning with the sliding window reconstruction technique, a frame rate of 23 low resolution images per second was achieved. Field inhomogeneity catheters were steered through a flow phantom and into the renal arteries of a pig.


RESULTS
It was possible to visualize flow or, respectively, vessels and to depict catheter movements. This enabled real-time MR-guidance of the catheter into the renal arteries of the flow phantom and into those of the pig.


CONCLUSIONS
The new technique yields a sufficiently high temporal resolution for MR-guidance of catheters through vessels.
Bücker
A
A
University of Minnesota, Minneapolis, USA. buecker@rad.rwth-aachen.de
Adam
G
G
Neuerburg
J M
JM
Glowinski
A
A
Nolte-Ernsting
C C
CC
Hunter
D
D
Grosskortenhaus
S
S
Leenen
M
M
Rasche
V
V
Proksa
R
R
van Vaals
J J
JJ
Hurtak
W
W
Günther
R W
RW
D000792:Angiography; D000818:Animals; D001012:Aorta, Abdominal / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D005240:Feasibility Studies; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000295:instrumentation* / Q000379:methods*; D019047:Phantoms, Imaging; D012077:Renal Artery / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D013552:Swine
Echtzeit-MR mit radialer k-Raumabtastung zur Uberwachung angiographischer Interventionen.