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Visualisation of intracranial aneurysms by transcranial duplex sonography
C Klötzsch1, H C Nahser, B Fischer
1Department of Neurology, Alfried-Krupp-Hospital, Essen, Germany.
Neuroradiology
|August 1, 1996
Summary
Transcranial color-coded duplex sonography (TCCD) visualized intracranial aneurysms in 47% of cases. This noninvasive method shows promise for monitoring thrombosis after coil embolization and following untreatable aneurysms.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Intracranial aneurysms pose significant risks, including subarachnoid hemorrhage and cranial nerve palsy.
- Accurate aneurysm detection and monitoring are crucial for effective patient management.
Purpose of the Study:
- To evaluate the efficacy of transcranial color-coded duplex sonography (TCCD) in detecting and characterizing intracranial aneurysms.
- To assess TCCD's utility in monitoring aneurysm treatment, particularly coil embolization.
Main Methods:
- Seventy-two patients with 89 angiographically confirmed intracranial aneurysms were examined using TCCD.
- A 2/2.25 MHz transducer was employed to visualize aneurysms through temporal bone windows or the foramen magnum.
Main Results:
- TCCD provided satisfactory visualization in 47% of aneurysms.
- Image quality was insufficient in 27% due to poor bone windows, small aneurysm size (<6 mm), or unfavorable location.
- Aneurysms were not detected in 26% of cases.
- TCCD demonstrated thrombosed structures in 8/12 giant aneurysms and 15/19 treated aneurysms.
Conclusions:
- TCCD is a noninvasive tool for monitoring intra-aneurysmal thrombosis post-coil embolization.
- It may be useful for follow-up of untreatable fusiform aneurysms.
- Detection of small aneurysms is limited by spatial resolution and insonation angles.