If mechanical thrombectomy is being considered, what imaging is recommended?

If mechanical thrombectomy is being considered, what imaging is recommended?

• A. Plain CT head
• B. CT angiography only
• C. Advanced imaging such as CT perfusion or MRI
• D. Ultrasound of the carotids

Answer: (C)

When considering thrombectomy, you need to know both where the blockage is and how much brain tissue can still be saved. A plain CT head mainly rules out bleeding and isn’t enough to judge tissue viability. A CT angiography can show the occluded vessel, but it doesn’t tell you how much brain is already infarcted versus how much remains at risk. Advanced imaging, like CT perfusion or MRI, provides detailed maps of blood flow and tissue viability, highlighting a potentially salvageable penumbra (tissue at risk) vs. the irreversibly damaged core. This information is especially important for patients outside the standard 6-hour window or in uncertain onset times, helping determine whether thrombectomy is likely to benefit. Ultrasound of the carotids doesn’t assess brain tissue viability in this acute decision. So, advanced perfusion-based imaging is the recommended approach when thrombectomy is being considered.

When considering thrombectomy, you need to know both where the blockage is and how much brain tissue can still be saved. A plain CT head mainly rules out bleeding and isn’t enough to judge tissue viability. A CT angiography can show the occluded vessel, but it doesn’t tell you how much brain is already infarcted versus how much remains at risk. Advanced imaging, like CT perfusion or MRI, provides detailed maps of blood flow and tissue viability, highlighting a potentially salvageable penumbra (tissue at risk) vs. the irreversibly damaged core. This information is especially important for patients outside the standard 6-hour window or in uncertain onset times, helping determine whether thrombectomy is likely to benefit. Ultrasound of the carotids doesn’t assess brain tissue viability in this acute decision. So, advanced perfusion-based imaging is the recommended approach when thrombectomy is being considered.