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Evaluation of the peripheral airway microstructure in children with cystic fibrosis (CF) using 3He magnetic resonance imaging

Erol Gaillard, Iain Ball, Kuldeep Panesar, Noor Al-Khathlan, Manjith Narayanan, Caroline Beardsmore, John Owers-Bradley
European Respiratory Journal 2012 40: 1846; DOI:
Erol Gaillard
1Institute of Lung Health, Department of Infection, Immunity and Inflammation, University of Leicester, United Kingdom
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Iain Ball
2Physics, University of Nottingham, United Kingdom
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Kuldeep Panesar
2Physics, University of Nottingham, United Kingdom
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Noor Al-Khathlan
1Institute of Lung Health, Department of Infection, Immunity and Inflammation, University of Leicester, United Kingdom
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Manjith Narayanan
1Institute of Lung Health, Department of Infection, Immunity and Inflammation, University of Leicester, United Kingdom
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Caroline Beardsmore
1Institute of Lung Health, Department of Infection, Immunity and Inflammation, University of Leicester, United Kingdom
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John Owers-Bradley
2Physics, University of Nottingham, United Kingdom
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Abstract

Background: Pathology and lung function studies show that small airways are affected early in CF lung disease. Due to the inaccessibility of the distal air spaces little research has been performed in this area. The lung microstructure can be studied using the relatively new technique of hyperpolarised noble gas magnetic resonance (3HeMR) scanning(1).

Study aims: To compare acinar airway size of children with CF with that of healthy controls.

Methods: In children with relatively mild CF lung disease 3HeMR was undertaken during breath-hold following inhalation of a bolus of hyperpolarised 3He gas mixture. A signal was obtained using the q-space technique(2). We applied Yablonskiy's acinar model(3) on the raw data to obtain the values for mean acinar duct diameter, R and mean alveolar sleeve depth, h. All children had spirometry and lung clearance index (LCI) measured.

Results: We studied 9 children (6-10y) with CF (FEV1: 97.6%predicted; SD ± 14.3) and 18 age-matched controls. LCI was elevated in all CF patients (median 10.7; range 9.1-12.9). Acinar duct diameters (438.4μm; SD ± 21.8) and alveolar sleeve depth (294.2μm; SD ± 60.3) were both significantly (p<0.05) larger compared to controls (404.3μm; SD ± 34.8 and 223.8μm; SD ± 38.5 respectively).

Discussion: 3HeMR is well tolerated in children from school age. We found that R and h, both surrogate values for acinar size, are larger in children with mild CF lung disease compared to healthy controls. 3HeMR may constitute a sensitive technique for investigating CF lung disease.

References:

1.Narayanan M et al 2012 AJRCCM; 185:186

2.Shanbhag DD et al 2006 JMRI; 24:84

3.Yablonskiy DA et al 2002 PNAS; 99:3111.

  • Biomarkers
  • Lung growth/development
  • Children
  • © 2012 ERS
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Evaluation of the peripheral airway microstructure in children with cystic fibrosis (CF) using 3He magnetic resonance imaging
Erol Gaillard, Iain Ball, Kuldeep Panesar, Noor Al-Khathlan, Manjith Narayanan, Caroline Beardsmore, John Owers-Bradley
European Respiratory Journal Sep 2012, 40 (Suppl 56) 1846;

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Evaluation of the peripheral airway microstructure in children with cystic fibrosis (CF) using 3He magnetic resonance imaging
Erol Gaillard, Iain Ball, Kuldeep Panesar, Noor Al-Khathlan, Manjith Narayanan, Caroline Beardsmore, John Owers-Bradley
European Respiratory Journal Sep 2012, 40 (Suppl 56) 1846;
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