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Hyperpolarized 3He apparent diffusion coefficient MRI of the lung: reproducibility and volume dependency in healthy volunteers and patients with emphysema

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  • Sandra Diaz
  • Ingrid Casselbrant
  • Eeva Piitulainen
  • Goran Pettersson
  • Peter Magnusson
  • Barry Peterson
  • Per Wollmer
  • Peter Leander
  • Olle Ekberg
  • Per Akeson
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PURPOSE: To measure the apparent diffusion coefficient (ADC) of hyperpolarized (HP) (3)He gas using diffusion weighted MRI in healthy volunteers and patients with emphysema and examine the reproducibility and volume dependency. MATERIALS AND METHODS: A total of eight healthy volunteers and 16 patients with emphysema were examined after inhalation of HP (3)He gas mixed with nitrogen (N(2)) during breathhold starting from functional residual capacity (FRC) in supine position. Coronal diffusion-sensitized MR images were acquired. Each subject was imaged on three separate days over a seven-day period and received two different volumes (6% and 15% of total lung capacity [TLC]) of HP (3)He each day. ADC maps and histograms were calculated. The mean and standard deviation (SD) of the ADC at different days and volumes were compared. RESULTS: The reproducibility of the mean ADC and SD over several days was good in both healthy volunteers and patients (SD range of 0.003-0.013 cm(2)/second and 0.001-0.009 cm(2)/second at 6% and 15% of TLC for healthy volunteers, and a SD range of 0.001-0.041 cm(2)/second and 0.001-0.011 cm(2)/second, respectively, for patients). A minor but significant increase in mean ADC with increased inhaled gas volume was observed in both groups. CONCLUSION: Mean ADC and SD of HP (3)He MRI is reproducible and discriminates well between healthy controls and patients with emphysema at the higher gas volume. This method is robust and may be useful to gain new insights into the pathophysiology and course of emphysema.
Original languageEnglish
JournalJournal of Magnetic Resonance Imaging
Volume27
Issue number4
Pages (from-to)763-70
Number of pages7
ISSN1053-1807
DOIs
Publication statusPublished - 2008

    Research areas

  • Adult, Diffusion Magnetic Resonance Imaging, Female, Forced Expiratory Volume, Helium, Humans, Isotopes, Lung, Male, Middle Aged, Pulmonary Disease, Chronic Obstructive, Pulmonary Emphysema, Reproducibility of Results, Vital Capacity

ID: 32572390