What is the primary purpose of angiography/arteriography?

The primary purpose of angiography or arteriography is to evaluate vascular structures. This imaging technique involves using contrast agents and X-ray technology to visualize the blood vessels in the body. By creating detailed images of the arteries and veins, healthcare providers can identify blockages, aneurysms, or other abnormalities in the blood vessels, which are critical for diagnosing and treating various vascular conditions. This procedure is essential for understanding blood flow dynamics and can guide surgical or medical interventions when necessary.

The other choices pertain to different medical assessments that do not utilize angiography. Analyzing brain activity involves techniques like electroencephalography (EEG) or functional MRI, assessing lung function typically requires pulmonary function tests, and measuring heart rate is done through electrocardiograms (ECGs) or vital sign monitors. Each of these areas requires specific methods tailored to their unique physiological processes, distinct from the vascular focus of angiography.