Time-resolved 3D MR angiography of the abdomen with a real-time system.
This study reports on the implementation of a real-time MR acquisition, reconstruction, and display system on standard hardware for 3D contrast-enhanced MR abdominal angiography. The system allows for dynamic imaging of the contrast passage with good spatial resolution in a single breathhold. It is capable of synchronously acquiring and processing multiple coil data. Bolus arrival can be detected confidently from the display of MIP images from sagittal 3D slabs with moderate spatial resolution. Upon detection of the contrast agent, the patient is asked to hold their breath and a novel 3D acquisition is started for a coronal volume. Temporal imaging within the breathhold is achieved through applying a modified time-resolved imaging of contrast kinetics (TRICKS) technique with elliptical centric view ordering. The technique displays contrast passage from the arterial phase through enhancement of the hepatic venous system. It also provides the ability to quantify motion of the diaphragm over a long breathhold.
Wieben
Oliver
O
Department of Electrical and Computer Engineering, University of Wisconsin, Madison, Wisconsin, USA. oliver.wieben@uniklinik-freiburg.de
Grist
Thomas M
TM
Hany
Thomas F
TF
Thornton
Frank J
FJ
Glaser
John K
JK
Skuldt
Dean H
DH
Block
Walter F
WF
D000005:Abdomen / Q000098:blood supply*; D000465:Algorithms; D006801:Humans; D021621:Imaging, Three-Dimensional; D018810:Magnetic Resonance Angiography / Q000379:methods*