What is CT Angiography?
CT Angiography (CTA) is a non-invasive imaging technique used to visualize blood vessels (arteries and veins) throughout the body. This procedure involves injecting a contrast dye into the bloodstream and capturing detailed 3D images using a high-resolution CT scanner. It helps detect blockages, aneurysms, blood clots, and vascular abnormalities in various organs, including the heart, brain, lungs, kidneys, and limbs.

When is CT Angiography Recommended?

  • Coronary artery disease (CAD) – to assess blockages in heart arteries

  • Brain aneurysms or stroke risk – to detect abnormal blood vessels

  • Peripheral artery disease (PAD) – to evaluate leg artery narrowing

  • Pulmonary embolism (PE) – to identify blood clots in the lungs

  • Aortic aneurysms or dissections – to check for weakening or tears in the aorta

  • Renal artery stenosis – to diagnose kidney-related vascular conditions

  • Pre-surgical vascular assessment – for planning bypass surgery or stent placement

How is CT Angiography Performed?

  1. Preparation:

    • The patient may need to fast for 4–6 hours before the procedure.

    • Inform the doctor about allergies, kidney issues, or medications (especially for diabetes or blood thinners).

    • A contrast dye (iodine-based) is injected into a vein for clear visualization of blood vessels.

  2. CT Scan & Image Capture:

    • The patient lies on a CT scan table, which moves through the scanner.

    • A contrast dye is injected into the bloodstream through an IV line in the arm.

    • The CT scanner captures multiple high-speed images of blood vessels in the targeted area.

  3. Completion & Recovery:

    • The scan typically takes 15–30 minutes.

    • Patients can resume normal activities immediately, unless advised otherwise.

    • Drinking plenty of water helps flush out the contrast dye from the body.

Benefits of CT Angiography

  • High-precision, non-invasive vascular imaging

  • Detects blockages, clots, and aneurysms early

  • Faster and safer alternative to conventional angiography

  • Guides treatment plans for heart, brain, and vascular diseases