Detailed lung scans could map COPD damage more precisely

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria:Patients with stable chronic obstructive pulmonary disease (COPD) Diagnosed according to GOLD criteria (post-bronchodilator FEV1/FVC \< 0.70) \- Exclusion Criteria: 1. Patient in exacerbation defined as change in the patient's baseline dyspnea, cough, and/or sputum beyond normal day-to-day variations within 14 days . (Ko, Fanny W., et al 2016) 2. Connective tissue disease . 3. Previously diagnosed Interstitial lung disease 4. Contraindication to PFT According to ATS (Stanojevic S., et al 2021) * Recent Myocardial Infarction Within 1 week * Blood Pressure Instability Severe hypertension or systemic hypotension * Arrhythmias Significant, uncontrolled atrial or ventricular arrhythmias * Decompensated heart failure * Pulmonary Circulation Issues: Uncontrolled pulmonary hypertension, acute cor pulmonale, or clinically unstable pulmonary embolism * History of Syncope Loss of consciousness related to coughing or forced expiration * Cerebral Aneurysm * Recent Brain Surgery: Within 4 weeks * Concussion: Recent concussion with prolonged symptoms * Eye Surgery: Recent eye surgery within 1 week * Pneumothorax: Active or untreated pneumothorax Recent Thoracic Surgery: Within 4 weeks Recent Abdominal Surgery: Within 4 weeks Late-Term Pregnancy 5. Contraindicatins of 6MWT according to ATS : Absolute contraindications * Unstable Angina Experienced during the previous 1 month. * Recent Myocardial Infarction : Within the previous 1 month. Relative contraindications * Resting Tachycardia: Resting heart rate \> 120{ bpm}. * Severe Uncontrolled Hypertension: * Systolic Blood Pressure \> 180{ mmHg} * Diastolic Blood Pressure \> 100{ mmHg} * Symptomatic/Severe Cardiac Conditions: High-degree atrioventricular (AV) block, hypertrophic cardiomyopathy, or symptomatic severe aortic stenosis.