Lung deposition of particles by airway generation in healthy subjects: Three-dimensional radionuclide imaging and numerical model prediction

Adel H. Hashish, John S. Fleming, Joy Conway, Peter Halson, Elizabeth Moore, Trevor J. Williams, Adrian G. Bailey, Michael Nassim, Stephen T. Holgate

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

Multi-modality medical imaging enables measurement of the three-dimensional spatial distribution of inhaled, radiolabelled aerosol within the human lung. Using a conceptual model of spatial lung morphology, this data may be transformed to provide information on deposition by airway generation in the conducting airways. This methodology has been used to study intrapulmonary deposition patterns in control subjects for two polydisperse aerosols produced by jet-type nebulizers of mass median aerodynamic diameter (MMAD) 1.8 and 6.8 μm. Comparison between derived experimental results and those from computer modelling shows reasonable agreement for total body, oropharynx and lung deposition and also for the difference in deposition pattern between the two aerosols. However, experiment suggests significantly less deposition in the central airways than is predicted by modelling. The new methodology has considerable potential in the fields of inhalation therapy and deposition modelling though more detailed validation is still required.

Original languageEnglish
Pages (from-to)205-215
Number of pages11
JournalJournal of Aerosol Science
Volume29
Issue number1-2
DOIs
Publication statusPublished - 1998
Externally publishedYes

ASJC Scopus subject areas

  • Environmental Engineering
  • Pollution
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes
  • Atmospheric Science

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