title: Digital respirosonography. New images of lung sounds.
abstract: We used tape recordings from normal subjects and from patients with lung disease to generate spectrographic images of respiratory sounds on a personal computer. These digital respirosonograms presented timing and frequency content of lung sounds, with the sound intensities displayed on a color scale. Respiratory sounds during inspiration and expiration could be recognized by their association with concurrent respiration curves. Contributions of low-frequency cardiac sounds were visually identified by their relationship to simultaneously recorded ECGs. Typical characteristics of normal and adventitious lung sounds were documented and displayed both in the time and the frequency domain. Digital respirosonography provides an easy way to assess lung sound amplitudes, frequencies and timing over several breaths.
authors.affiliation: Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Canada.
authors.forename: H
authors.initials: H
authors.lastname: Pasterkamp
authors.forename: C
authors.initials: C
authors.lastname: Carson
authors.forename: D
authors.initials: D
authors.lastname: Daien
authors.forename: Y
authors.initials: Y
authors.lastname: Oh
mesh_terms: D000293:Adolescent; D000328:Adult; D004562:Electrocardiography; D005260:Female; D005583:Fourier Analysis; D006801:Humans; D007091:Image Processing, Computer-Assisted; D007231:Infant, Newborn; D008171:Lung Diseases / Q000503:physiopathology*; D008297:Male; D012016:Reference Values; D012135:Respiratory Sounds / Q000175:diagnosis / Q000503:physiopathology*; D014463:Ultrasonography