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Obstructive sleep apnea: MR imaging volume segmentation analysis.

M Bret Abbott1, Lane F Donnelly, Bernard J Dardzinski

  • 1Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Ave, Cincinnati, OH 45229-3090, USA.

Radiology
|August 31, 2004
PubMed
Summary
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Children with obstructive sleep apnea (OSA) exhibit increased airway wall motion, including distention and collapse, as shown by magnetic resonance imaging (MRI). This study quantifies these dynamic changes in airway volume during respiration.

Area of Science:

  • Medical Imaging
  • Pediatric Pulmonology
  • Sleep Medicine

Background:

  • Obstructive sleep apnea (OSA) is a common condition in children.
  • Understanding the dynamic airway changes in pediatric OSA is crucial for diagnosis and management.

Purpose of the Study:

  • To assess airway wall motion in children with OSA using transverse cine magnetic resonance (MR) imaging.
  • To quantify airway volume changes and dynamics in pediatric OSA patients.

Main Methods:

  • Retrospective analysis of transverse fast gradient-echo cine MR images of the hypopharynx in children with and without OSA.
  • Volume segmentation with k-means clustering to quantify airway volumes over time.
  • Comparison of airway wall motion metrics (standard deviation, range, coefficient of variance, normalized range) between groups.

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Main Results:

  • Children with OSA showed significantly larger fluctuations in airway volume during respiration compared to controls.
  • Airway distention and collapse were evident in OSA patients.
  • Statistically significant differences in airway dynamics, including larger average airway volume and motion, were observed in the OSA group.

Conclusions:

  • Volume segmentation of transverse cine MR images effectively quantifies increased airway wall motion in pediatric OSA.
  • Transverse MR imaging is a valuable tool for visualizing airway distention and collapse in children with OSA.