Kiarash Emami1, Yi Xin1, Puttisarn Mongkolwisetwara1, Harrilla Profka1, Jennia Rajaei1, Stephen J. Kadlecek1, Masaru Ishii2, Rahim R. Rizi1
1Radiology, University of Pennsylvania, Philadelphia, PA, United States; 2Otolaryngology - Head and Neck Surgery, Johns Hopkins University, Baltimore, MD, United States
Introduction of controlled pre-acquisition time delay in the existing fractional ventilation imaging technique provides a tool for determining regional gas arrival time constant, with a fairly similar implication to lung RC time constants on a regional basis. Results can alternatively be utilized to select a proper pre-acquisition time delay to minimize motion-induced errors and well mixing of inspired and residual gases in standard specific ventilation imaging applications with HP gas MRI.