Maxim Terekhov1, Manuela Gueldner2,
Klaus Gast3, Julien Rivoire1, Ursula Wolf3, Janet
Friedrich1, Sergei Karpuk2, Zahir Salhi2,
Laura Maria Schreiber1
1Department of Diagnostic
& Interventional Radiology. Section of Medical Physics, Johannes
Gutenberg University Medical Center Mainz, Mainz, Germany; 2Institute
of Physics, Johannes Gutenberg University Mainz, 3Department of
Diagnostic & Interventional Radiology, Johannes Gutenberg University
Medical Center Mainz, Mainz, Germany
Dynamic ventilation (DV) of lung measured with 3He MRI is an efficient tool to visualize the intrapulmonary gas inflow. In current work we performed comparison 3He application with two different form of gas bolus: short bolus delivered by Application Unit (AU) in Free-Breathing mode and Forced Inspiration from Tedlar bag (TB) via fine tube with high resistance and prolonged bolus shape. The discrepancy between application modes was considered in terms of first orders Linear Transfer Function. The results show that TB-application changes significantly the gas transport in parenchyma and higher order derivations of input bolus function should be accounted.
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