The peripheral airways in Asthma: significance, assessment, and targeted treatment
Alfred Health/Monash & Newcastle UK University
Abstract
The peripheral airways are technically challenging to assess and have been overlooked in the assessment of chronic respiratory diseases such as Asthma, in both the clinical and research space. Evidence of the importance of the small airways in Asthma is building, and small airways dysfunction is implicated in poor Asthma control, airway hyperresponsiveness, and exacerbation risk. The aim of this research was to complete comprehensive global, regional, and spatial assessments of airway function and ventilation in Asthma using physiological and MRI techniques. Specific ventilation imaging (SVI) and Phase resolved functional lung imaging (PREFUL) formed the spatial assessments. SVI uses oxygen as a contrast agent and looks at rate of change in signal to assess ventilation heterogeneity, PREFUL is a completely contrast free technique that uses Fourier decomposition to determine fractional ventilation.
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