Functional imaging of COPD by CT and MRI

Area of Science:

• Pulmonary Medicine
• Radiology
• Medical Imaging

Background:

• Chronic obstructive pulmonary disease (COPD) is a complex respiratory condition with diverse pathological components.
• Accurate functional assessment is crucial for effective COPD management and treatment individualization.

Purpose of the Study:

• To review the role of computed tomography (CT) and magnetic resonance imaging (MRI) in the functional assessment of COPD.
• To highlight how imaging metrics can inform personalized treatment strategies and monitor disease progression.

Main Methods:

• Review of current literature on CT and MRI applications in COPD functional assessment.
• Discussion of specific imaging techniques including CT quantification (emphysema, air trapping, airway thickening) and hyperpolarized gas MRI (apparent diffusion coefficient).
• Exploration of perfusion imaging and CT-based pulmonary vascular volume assessment.

Main Results:

• CT enables quantitative assessment of emphysema, air trapping, and airway wall thickening, aiding in COPD phenotyping.
• Hyperpolarized gas MRI provides an index of airspace enlargement, correlating with emphysema.
• Vascular imaging (perfusion, CT-based pulmonary vascular volume) reveals the impact of pulmonary vascular disease on COPD impairment.
• Functional imaging can detect early lung dysfunction, particularly in individuals with inhalational exposures.

Conclusions:

• CT and MRI are powerful tools for individualized COPD assessment, moving beyond traditional pulmonary function tests.
• Quantitative imaging metrics can guide targeted therapies and monitor treatment response or disease progression in COPD.
• Functional imaging plays a vital role in early detection of lung dysfunction and understanding COPD heterogeneity.