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Silent embolism in diagnostic cerebral angiography: detection with diffusion-weighted imaging
Kenneth C Chuah1, Stephen L Stuckey, Ivor G Berman
1Department of Radiology, The Alfred Hospital, Melbourne, Victoria, Australia.
Australasian Radiology
|July 3, 2004
Summary
Cerebral angiography can cause neurological events. Diffusion-weighted MRI (DWI) detected subclinical events in 3 of 20 patients, offering a sensitive method for assessing angiography complications.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Cerebral angiography is associated with known neurological risks.
- Assessing these complications often relies on clinical observation.
- Diagnostic cerebral angiographic examinations were prospectively studied.
Observation:
- Twenty patients underwent diagnostic cerebral angiographic examinations.
- Diffusion-weighted MRI (DWI) was performed before and after angiography in most patients.
- No clinical neurological deficits were observed post-angiography.
Findings:
- New hyperintense signal abnormalities on DWI were detected in 3 out of 20 patients.
- These abnormalities represent subclinical neurological events.
- DWI proved effective in identifying neurological changes not apparent clinically.
Implications:
- Diffusion-weighted MRI offers an objective method to detect clinical and subclinical neurological events.
- DWI may simplify complication rate assessment in cerebral angiography.
- This imaging technique could reduce the sample size needed for statistical analysis of angiography complications.