Comparative Analysis of COPD Phenotyping Using MRI and CT in a Multi-Center Study
Overview
This multi-center study evaluated the feasibility and diagnostic yield of MRI compared to low-dose CT (LDCT) for phenotyping COPD in 607 patients. MRI demonstrated good concordance with CT in identifying COPD phenotypes, supporting its potential as a radiation-free alternative for lung imaging in COPD.
Background
COPD is a heterogeneous respiratory disease with varying airway and parenchymal involvement, traditionally assessed by spirometry. CT has been the standard imaging modality for COPD phenotyping, providing detailed morphologic information but involves radiation exposure. MRI offers a radiation-free alternative with the ability to assess both structural and functional lung abnormalities. This study aimed to compare MRI and CT performed on the same day to assess their agreement and diagnostic value in COPD phenotyping across multiple centers.
Data Highlights
Parameter
Modality
Assessment
Number of participants
MRI and CT
607 COPD patients
Imaging protocols
MRI
1.5T and 3.0T scanners; morphological and dynamic contrast-enhanced sequences; ~30 min acquisition
Imaging protocols
CT
Low-dose, inspiratory and expiratory spiral acquisitions; thin collimation
Image analysis
Both
Independent blinded reads by two radiologists; consensus by third expert
Scoring system
Both
Semi-quantitative visual scoring based on established COPD and cystic fibrosis systems
Key Findings
MRI was feasible across multiple centers using standardized protocols on different scanner types.
Good agreement was observed between MRI and CT in detecting airway disease features such as bronchiectasis and bronchial wall thickening.
MRI combined morphological imaging with functional assessment including lung perfusion, which CT cannot provide without contrast.
CT remained the reference standard for detailed morphologic assessment, including mosaic attenuation and air trapping patterns.
Use of MRI avoids cumulative radiation exposure, important for repeat monitoring in COPD patients.
Clinical Implications
MRI can serve as a radiation-free alternative to CT for COPD phenotyping, especially valuable for longitudinal monitoring. Its ability to combine structural and functional imaging may provide additional insights into disease mechanisms and guide personalized treatment strategies. However, CT remains important for detailed morphologic characterization where MRI resolution is limited.
Conclusion
This large multi-center study demonstrates that MRI is a feasible and diagnostically valuable tool for COPD phenotyping with good concordance to CT. MRI offers a promising radiation-free imaging alternative that may complement or partially replace CT in clinical and research settings.
References
Global Burden of Disease Study 2019 -- COPD Mortality Data
COPD Gene CT Workshop Group -- COPD Phenotyping by CT
COSYCONET Study -- COPD Cohort and Imaging Substudy
World Medical Association -- Good Clinical Practice Guidelines
by Sebastian Nauck, Moritz Pohl, Bertram J. Jobst, Claudius Melzig, Hagen Meredig, Oliver Weinheimer, Simon Triphan, Oyunbileg von Stackelberg, Philip Konietzke, Hans-Ulrich Kauczor, Claus P. Heußel, Mark O. Wielpütz, Jürgen Biederer
