Which imaging technique records pictures of blood vessels?

• A. Fluoroscopy
• B. Angiography
• C. MRI
• D. Ultrasound

Answer: (B)

Angiography is the imaging method that records pictures of blood vessels. It works by injecting a contrast agent into the vascular system and using X-ray imaging to capture the outline of the vessels as the contrast flows through arteries and veins. This produces clear, detailed pictures of the vascular tree, letting clinicians see blockages, malformations, or aneurysms. Real-time fluoroscopy is often used during angiography to guide catheters and acquisition of images, but angiography is the specific technique focused on visualizing the vessels themselves. Other modalities can visualize vessels in different ways—MRI with MR angiography or ultrasound with Doppler—but the direct, contrast-enhanced X-ray visualization that records vascular pictures is angiography.