Meeting Banner
Abstract #1235

Caught Sleeping: Recording of Snoring During a Real-Time MRI Scan

Yoon-Chul Kim1, Michael I. Proctor2, Michael C.K. Khoo3, Shrikanth S. Narayanan1, Krishna S. Nayak1

1Electrical Engineering, University of Southern California, Los Angeles, CA, United States; 2Linguistics, University of Western Sydney, Sydney, Australia; 3Biomedical Engineering and Pediatrics, University of Southern California, Los Angeles, CA, United States

Real-time MRI has been used to study speech production as well as to identify collapse sites in subjects with obstructive sleep apnea. Snoring is a common precursor to apnea, and an indication of potential airway obstruction. We implemented a pulse sequence to allow for gradual ramping of gradients, resulting in gradual increase of acoustic noise, to facilitate natural sleep onset. In one subject, who reported falling asleep, we observed airway obstruction near the soft palate, and MRI-noise cancelled synchronized audio of snoring sounds.

Abstract PDF

Keywords

accompanied acoustic acoustics adaptive airway allows amplitude analyze anterior arrow arrows artifact audio better biomedical blue cancellation caught choices clinical coil collapse common compromising constriction contains contribute control coronal correlation croft custom dashed distinguishable dynamics electrical endoscopy engineering enlarged epiglottis event events every examine facilitate foam frames gradient gradients gradual head identify immediately immobilized implemented improvements improving indicated induced invasive involves involving larger like linguistics location made male medicine microphone minutes modeling mouth narrowing nasal natural near necessary noise noisy note obstruction optical pads palate patients patterns pediatrics performance periodicity pharyngeal placed portion precursor preliminary proctor properties pulse ramp real reconstruction recording reduce relationship resolution scanner sedation shaping shin simultaneous site sites sleep sleeping slew slice slices sliding snoring soft sophisticated sound sounds southern spatial speech spiral subject subjects subsequent suggest superior supine synchronized syndrome temporal tissue track typically understanding underwent upper vibration view vocal wave waveform western white window yellow