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Abstract #3540

Comparison of Normalized T1 and Pulmonary Blood Flow Assessments in Cystic Fibrosis Lung Disease

Lan Lu 1,2 , Shannon Donnola 1 , Elliott C Dasenbrook 3 , David Weaver 3 , Michael W Konstan 3 , and Chris A Flask 1,4

1 Department of Radiology, Case Western Reserve University, Cleveland, OH, United States, 2 Department of Urology, Case Western Reserve University, Cleveland, OH, United States, 3 Department of Pediatrics, Case Western Reserve University, Cleveland, OH, United States, 4 Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States

We have previously developed a normalized T1 (nT1) method to sensitively and rapidly detect early-stage lung disease in cystic fibrosis (CF) patients. In this study, we aimed to determine the mechanism underlying observed nT1 changes in CF patients by direct comparison with pulmonary perfusion assessed by Arterial Spin Labeling. ASL and nT1 assessments in nine CF patients demonstrated significantly reduced mean nT1 and pulmonary perfusion in the upper lungs in comparison to healthy controls. A significant correlation (p <0.05) was also observed between nT1 and pulmonary perfusion. These results suggest that the nT1 technique is related to pulmonary perfusion.

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