Ahsan Javed1, Rajiv Ramasawmy1, Joel Moss2, Waqas Majeed3, Pan Su3, Thomas Benkert4, Himanshu Bhat3, and Adrienne E Campbell-Washburn5
1Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States, 2Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States, 3Siemens Medical Solutions USA Inc., Malvern, PA, United States, 4Siemens Healthcare GmbH, Erlangen, Germany, 5Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institute of Health, Bethesda, MD, United States
1Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States, 2Pulmonary Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, United States, 3Siemens Medical Solutions USA Inc., Malvern, PA, United States, 4Siemens Healthcare GmbH, Erlangen, Germany, 5Cardiovascular Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institute of Health, Bethesda, MD, United States
We developed and optimized a high-resolution stack-of-spirals UTE sequence for pulmonary imaging at 0.55T which leverages a combination of robust respiratory-binning, trajectory correction and concomitant-field corrections to achieve diagnostic image quality.
Figure 3: Coronal 3D UTE images in a patient with lung nodules and a healthy volunteer (A) before (B) after retrospective binning and (C) following concomitant field corrections. Blue arrows show some of the regions of improvements with self-gating-based retrospective binning. Red circle shows improvement in delineation of the lung nodule. Red arrows highlight some visible improvements in image sharpness with concomitant field corrections. Significant improvements in image sharpness are demonstrated with both binning and concomitant field corrections.
Figure 4: Representative example of axial 3D UTE images in a LAM patient (A) before and (B) after concomitant field correction. Blue arrows show improvements in cyst delineation and visibility with concomitant field corrections. Red arrows show improvements in vessel sharpness.