Computed Tomography Angiography (CTA)
What is computed tomography angiography (CTA)?
Computed tomography angiography (CTA) is a diagnostic imaging test that combines a CT scan with an intravenously injected special dye (contrast material). This dye enhances the visibility of blood vessels and surrounding tissues.
CTA uses X-ray technology and computer processing to create detailed cross-sectional images of the body. These images are used to:
- Find blood vessels narrowed by atherosclerosis
- Find or measure the size of an aneurysm
- Find abnormal blood vessel formations inside the brain
- Follow vessels affected by dissections
- Identify damaged blood vessels
- Find blood clots in the lungs
- Evaluate a tumor fed by blood vessels
Unlike magnetic resonance angiography (MRA), which uses magnetic fields and radio waves, CTA uses X-rays and involves minimal radiation exposure. The amount of radiation is considered low, with a low risk of radiation-related health effects.
How does computed tomography angiography (CTA) improve healthcare?
CTA is instrumental in diagnosing and assessing diseases affecting blood vessels. It plays a crucial role before and after surgical procedures:
- Pre-surgery: Helps surgeons plan procedures by visualizing blood flow and vessel structure.
- Post-surgery: Evaluate the effectiveness of surgical interventions and monitor recovery.
CTA’s ability to provide detailed images of blood vessels aids in accurate diagnosis, treatment planning, and ongoing patient care, making it a valuable tool in modern healthcare.