ADC Apparent diffusion coefficient COPD Chronic obstructive pulmonary disease CT Computed tomography CTEPH Chronic thromboembolic pulmonary hypertension EBUS Endobronchial ultrasound FDG 2-fluoro-2-deoxy-D-glucose FDG-PET 2-fluoro-2-deoxy-D-glucose positron emission tomography FEV1 Forced expiratory volume in 1 s HRCT High-resolution computed tomography MIP Maximum intensity projection MRI Magnetic resonance imaging OCT Optical coherence tomography PET Positron emission tomography SPECT Single photon emission computed tomography UTE Ultra-short echo time List of abbreviations