NDLI: Pulmonary 3He magnetic resonance imaging of childhood asthma.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Cadman, Robert V. Lemanske, Robert F. Evans, Michael D. Jackson, Daniel J. Gern, James E. Sorkness, Ronald L. Fain, Sean B.
Description	Country affiliation: United States Author Affiliation: Cadman RV ( Department of Medical Physics, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wis 53705, USA.)
Abstract	BACKGROUND: Magnetic resonance imaging (MRI) with (3)He does not require ionizing radiation and has been shown to detect regional abnormalities in lung ventilation and structure in adults with asthma, but the method has not been extended to children with asthma. Measurements of regional lung ventilation and microstructure in subjects with childhood asthma could advance our understanding of disease mechanisms. OBJECTIVE: We sought to determine whether (3)He MRI in children can identify abnormalities related to the diagnosis of asthma or prior history of respiratory illness. METHODS: Forty-four children aged 9 to 10 years were recruited from a birth cohort at increased risk of asthma and allergic diseases. For each subject, a time-resolved 3-dimensional image series and a 3-dimensional diffusion-weighted image were acquired in separate breathing maneuvers. The numbers and sizes of ventilation defects were scored, and regional maps and statistics of average (3)He diffusion lengths were calculated. RESULTS: Children with mild-to-moderate asthma had lower average root-mean-square diffusion length (X(rms)) values (P = .004), increased regional SD of diffusion length values (P = .03), and higher defect scores (P = .03) than those without asthma. Children with histories of wheezing illness with rhinovirus infection before the third birthday had lower X(rms) values (P = .01) and higher defect scores (P = .05). CONCLUSION: MRI with (3)He detected more and larger regions of ventilation defect and a greater degree of restricted gas diffusion in children with asthma compared with those seen in children without asthma. These measures are consistent with regional obstruction and smaller and more regionally variable dimensions of the peripheral airways and alveolar spaces.
File Format	HTM / HTML
ISSN	00916749
e-ISSN	10976825
DOI	10.1016/j.jaci.2012.10.032
Journal	Journal of Allergy and Clinical Immunology
Issue Number	2
Volume Number	131
Language	English
Publisher	Elsevier
Publisher Date	2013-02-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Immunology Asthma Pathology Lung Magnetic Resonance Imaging Helium Chemistry Isotopes Pulmonary Ventilation Respiratory Sounds Physiopathology Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Immunology and Allergy Immunology

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