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Abstract #1628

Quantitative Gas Exchange using Hyperpolarized 129Xe MRI in Idiopathic Pulmonary Fibrosis

Ziyi Wang1, Scott Haile Robertson2, Jennifer Wang3, Elianna Ada Bier2, Mu He4, and Bastiaan Driehuys1,2,5

1Biomedical Engineering, Duke University, Durham, NC, United States, 2Medical Physics Graduate Program, Duke University, Durham, NC, United States, 3School of Medicine, Duke University, Durham, NC, United States, 4Electrical and Computer Engineering, Duke University, Durham, NC, United States, 5Radiology, Duke University Medical Center, Durham, NC, United States

Hyperpolarized 129Xe MRI exploits solubility and chemical shift to image regional alterations in gas exchange. These properties have been particularly promising for sensitive detection and monitoring of idiopathic pulmonary fibrosis (IPF). Here we seek to refine our analysis of regional gas exchange impairment by mapping the 129Xe uptake in blood and barrier tissues relative to gas-phase signal intensity. This work shows that gas exchange impairment is dominated by increased 129Xe uptake in barrier tissues.

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