Three-dimensional cine imaging using variable-density spiral trajectories and SSFP with application to coronary artery angiography.
A single breath-hold 3D cardiac phase resolved steady-state free precession (SSFP) sequence was developed, allowing 3D visualization of the moving coronary arteries. A 3D stack of spirals was acquired continuously throughout the cardiac cycle, and a sliding window reconstruction was used to achieve high temporal resolution. A coil specific field of view reconstruction technique was combined with Parallel Imaging with Localized Sensitivities (PILS) to allow acquisition of a reduced field of view. A view ordering incorporating fat suppression was employed to allow use of sliding window reconstruction. The technique was evaluated on healthy volunteers (n=8), yielding images with 102 ms temporal resolution and 1.35 mm in-plane resolution, and reasonable visualization of the left and right coronary arteries was achieved.
Kressler
Bryan
B
Department of Biomedical Engineering, Cornell University, Ithaca, New York, USA, and Department of Radiology, Chinese PLA General Hospital, Beijing, China.
Spincemaille
Pascal
P
Nguyen
Thanh D
TD
Cheng
Liuquan
L
Xi Hai
Zhao
Z
Prince
Martin R
MR
Wang
Yi
Y
D000465:Algorithms; D016477:Artifacts; D003331:Coronary Vessels / Q000473:pathology*; D005583:Fourier Analysis; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D018810:Magnetic Resonance Angiography / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D009200:Myocardial Contraction / Q000502:physiology; D019047:Phantoms, Imaging