Peng Hu1, Michael L. Chuang, Thomas H.
Hauser, Kraig V. Kissinger, Beth Goddu, Lois A. Goepfert, Neil M. Rofsky2,
Warren J. Manning, Reza Nezafat
propose a non-contrast-enhanced free-breathing ECG-gated gradient-echo
sequence with a sagittal slab-selective inversion for pulmonary vein (PV)
MRA. The inversion pulse was applied to suppress structures adjacent to the
left atrium (LA) and PVs, thereby, improving the conspicuity of the PV/LA.
The inversion slab thickness and inversion time were optimized on volunteers
to be 60mm and 500ms, respectively.
The proposed technique significantly increased the CNR between the
LA/PV and adjacent structures by 4-20 fold with minimal loss of signal in
LA/PV. The PV size measurements of the proposed technique correlated well
with clinical contrast-enhanced MRA on 9 atrial fibrillation patients.