A chest computed tomography (CT) scan may be ordered to detect interstitial lung disease, along with possible emboli, and provide information on the heart. Recently an ultrafast CT scan called an electron-beam tomography has been used to monitor changes in the right atrium and ventricle. Cardiac magnetic resonance imaging is useful in the assessment of the right heart as it provides a direct assessment of cardiac volume, muscle mass, and function. Ventilation/perfusion scans and pulmonary angiography
may also be used to diagnose pulmonary embolism, which is a cause of chronic thromboembolic Pulmonary hypertension.