Computed tomography angiography (CTA) plays a crucial role in diagnosing abdominal aortic aneurysms (AAA) by providing a detailed and accurate visualization of the aorta and surrounding blood vessels. Here's how CTA helps diagnose AAA:

Steps Involved in Computed Tomography Angiography (CTA)

1. Preparation: You'll lie on a movable table and receive an injection of contrast dye through an intravenous line. The dye helps highlight the blood vessels in the CTA images.
2. Scanning: X-ray beams pass through your body and are detected by sensors. Advanced algorithms then reconstruct these signals into detailed 3D images of the aorta and surrounding structures.
3. Image analysis: Radiologists analyze the CTA images to assess the size, shape and location of the abdominal aortic aneurysm (AAA). They can also evaluate the presence of blood clots or complications like leaks.

Advantages of Using CTA for AAA Diagnosis

• Accuracy: CTA provides highly accurate, detailed images of the aorta, often allowing for precise measurement of the aneurysm diameter and identification of even small AAAs.
• 3D visualization: The 3D reconstruction of the aorta helps visualize its complex anatomy and assess the relationship between the AAA and surrounding vessels, crucial for planning treatment.
• Fast and painless: The scan itself takes only a few minutes and is painless.
• Reduced need for other imaging: In many cases, CTA can definitively diagnose AAA, potentially eliminating the need for further invasive tests like angiography.

Limitations of CTA

• Radiation exposure: CTA involves exposure to ionizing radiation, which carries a small risk of long-term health effects. However, it is possible the benefits of accurate diagnosis outweigh this risk.
• Contrast dye reaction: While rare, some individuals may experience allergic reactions to the contrast dye.
• Cost: CTA is generally more expensive than other imaging options like ultrasound.

When Is CTA Used for AAA Diagnosis?

• Suspected AAA: When someone shows symptoms suggestive of AAA or has risk factors like smoking and advanced age, a CTA might be ordered to confirm the diagnosis.
• Evaluating AAA size and complexity: CTA often provides detailed information about the size, shape and location of the AAA, crucial for determining the best treatment approach.
• Preoperative planning: If surgery is considered, CTA helps surgeons visualize the AAA and surrounding anatomy to plan the operation precisely.

Overall, CTA is a valuable and effective tool for diagnosing AAA. Its accuracy, speed and detailed visualization make it an important piece of the puzzle in managing this potentially life-threatening condition.

If you or your loved one is in the San Antonio area, Boerne or New Braunfels, call 210-369-9151 today to make your appointment with Dr. Busken.