Which imaging modality is generally better for evaluating calcified plaques within vessels?

Which imaging modality is generally better for evaluating calcified plaques within vessels?

• A. IVUS is better for calcified plaques.
• B. OCT is better for calcified plaques.
• C. Both are equally good at calcifications.
• D. Neither is suitable for calcified plaques.

Answer: (A)

The main idea is penetration through dense tissue. Calcified plaques are highly reflective and can block light, which makes light-based imaging less reliable for assessing the full extent of calcification. IVUS uses ultrasound, which penetrates calcium more effectively, letting you see the vessel wall, lumen, and the arc and extent of calcification with enough depth to guide therapy. This makes IVUS generally better for evaluating calcified plaques and planning interventions, such as sizing and stent expansion. OCT, while offering very high resolution for soft tissue and microstructures, suffers from signal attenuation and shadowing when calcium is present, obscuring deeper details behind the calcified area. So for assessing calcified plaques, IVUS provides a clearer, more actionable view.

The main idea is penetration through dense tissue. Calcified plaques are highly reflective and can block light, which makes light-based imaging less reliable for assessing the full extent of calcification. IVUS uses ultrasound, which penetrates calcium more effectively, letting you see the vessel wall, lumen, and the arc and extent of calcification with enough depth to guide therapy. This makes IVUS generally better for evaluating calcified plaques and planning interventions, such as sizing and stent expansion. OCT, while offering very high resolution for soft tissue and microstructures, suffers from signal attenuation and shadowing when calcium is present, obscuring deeper details behind the calcified area. So for assessing calcified plaques, IVUS provides a clearer, more actionable view.