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Angiography is a medical imaging technique used to visualize the blood vessels, particularly those in the heart, brain, and extremities. It involves injecting a contrast dye into the blood vessels and using X-rays or other imaging modalities to create detailed images of the vessel structure. This procedure is commonly used to diagnose and assess the severity of conditions such as coronary artery disease, peripheral artery disease, and aneurysms.

The contrast dye used in angiography enhances the visibility of the blood vessels on the images, allowing healthcare professionals to identify blockages, narrowing, or other abnormalities. The procedure can be performed using various techniques, including conventional angiography, which uses X-rays, and digital subtraction angiography (DSA), which overlays the contrast-enhanced images onto a mask of the non-contrast images to improve visualization.

Angiography is typically performed in a hospital or clinical setting under local anesthesia or sedation. The procedure is relatively quick, usually taking only a few minutes, and is generally considered safe with minimal risks. However, like any medical procedure, angiography carries potential complications, such as allergic reactions to the contrast dye, blood clots, and damage to the blood vessels.

The primary benefits of angiography include its ability to provide detailed information about the condition of the blood vessels, guide treatment decisions, and help monitor the effectiveness of interventions. It is often used in conjunction with other diagnostic tests and treatments, such as angioplasty or stent placement, to manage vascular conditions effectively.