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Regional investigation of lung function and microstructure parameters by localized 129 Xe chemical shift saturation recovery and dissolved‐phase imaging: A reproducibility study
Author(s) -
Kern Agilo Luitger,
Gutberlet Marcel,
Qing Kun,
Voskrebenzev Andreas,
Klimeš Filip,
Kaireit Till Frederik,
Czerner Christoph,
Biller Heike,
Wacker Frank,
Ruppert Kai,
Hohlfeld Jens M.,
VogelClaussen Jens
Publication year - 2019
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.27407
Subject(s) - reproducibility , saturation (graph theory) , phase (matter) , lung function , microstructure , nuclear magnetic resonance , xenon , materials science , analytical chemistry (journal) , chemistry , radiochemistry , physics , lung , atomic physics , medicine , environmental chemistry , mathematics , metallurgy , chromatography , combinatorics , organic chemistry
Purpose To evaluate the reproducibility and regional variation of parameters obtained from localized 129 Xe chemical shift saturation recovery (CSSR) MR spectroscopy in healthy volunteers and patients with chronic obstructive pulmonary disease (COPD) and to compare the results to 129 Xe dissolved‐phase MR imaging. Methods Thirteen healthy volunteers and 10 COPD patients were scanned twice using 129 Xe dissolved‐phase imaging, CSSR, and ventilation imaging sequences. A 16‐channel phased‐array coil in combination with the regularized spectral localization achieved by sensitivity heterogeneity (SPLASH) method was used to perform a regional analysis of CSSR data. Lung function and microstructural parameters were obtained using Patz model functions and their reproducibility was assessed. Results The Patz model alveolar wall thickness parameter shows good reproducibility on a regional basis with a median coefficient of variation of 6.5% in healthy volunteers and 12.4% in COPD patients. Significant regional differences of lung function parameters derived from localized CSSR were found in healthy volunteers and correlations with spirometric indices were found. Conclusion Localized 129 Xe CSSR provides reproducible estimates of alveolar wall thickness and is able to detect regional differences of lung microstructure.