Real-time MRI of Upper Airway Collapse during Inspiratory Loading
Colrain I, Nayak K, Nielsen J
SRI International, University of Melbourne
Real-time single- and multi-slice upper airway (UA) imaging was performed using an echo-planar gradient echo pulse sequence, achieving 1.56 mm spatial resolution over a 20 cm FOV with a 5 mm slice thickness every 160 ms. Susceptibility resulted in moderate warping artifacts, which were mitigated by shortening the readout duration. Application of a –5 cm H2O load to an awake male subject diagnosed with primary snoring resulted in significant narrowing in UA 2D cross sectional area, primarily in the lateral (R/L) direction. We achieved real-time visualization of UA collapse in response to a known increase in inspiratory load.