Which technique is used in Carotid or Vertebral Angiography?

Which technique is used in Carotid or Vertebral Angiography?

• A. Digital subtraction
• B. Intravascular ultrasound
• C. Magnetic resonance angiography
• D. Computed tomography angiography

Answer: (A)

The technique used for imaging carotid or vertebral arteries during angiography is digital subtraction angiography. This approach works by taking images after injecting contrast into the arteries and then subtracting a pre-contrast image from the post-contrast image. The subtraction removes overlying bones and soft tissue, leaving a very clean, high-contrast view of the arterial lumen. This is crucial for accurately assessing the carotid and vertebral circulation, identifying stenosis, occlusions, dissections, or aneurysms, and guiding any therapeutic interventions. Other imaging modalities—such as intravascular ultrasound, magnetic resonance angiography, or computed tomography angiography—are either intravascular imaging, noninvasive MRI, or CT-based techniques, and do not constitute the catheter-based subtraction method used to visualize these vessels with high detail.

The technique used for imaging carotid or vertebral arteries during angiography is digital subtraction angiography. This approach works by taking images after injecting contrast into the arteries and then subtracting a pre-contrast image from the post-contrast image. The subtraction removes overlying bones and soft tissue, leaving a very clean, high-contrast view of the arterial lumen. This is crucial for accurately assessing the carotid and vertebral circulation, identifying stenosis, occlusions, dissections, or aneurysms, and guiding any therapeutic interventions. Other imaging modalities—such as intravascular ultrasound, magnetic resonance angiography, or computed tomography angiography—are either intravascular imaging, noninvasive MRI, or CT-based techniques, and do not constitute the catheter-based subtraction method used to visualize these vessels with high detail.