Saudi Journal of Radiology
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Saudi Journal of Radiology

Volume 1, 2022 · Issue 1st Issue · Open Access · Double-blind Peer-review

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Original Research Article

Does adding a sequence in brain MRI help in evaluation of seizures?

Khawaja bilal Waheed1, Ali Al Orf2, Faisal Mohammad Alzahrani2, Nawaf Nasser Aljubair2, Muhammad Zia Ul Hassan3, Abdulrahim Khushi Muhammad3, Elsayed Mohamed Ali3, Fatimah H. Albahhar & Zechariah J. Arulanantham

1 King Fahad Military Medical Complex Dhahran

2 Radiology Department, King Fahad Military Medical Complex, Saudi Arabia, Dhahran.

3 King Fahad Military Medical Complex

Published: 05 May 2026

https://doi.org/10.55038/sjr.v1i1.41
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Abstract

Objective
To evaluate the diagnostic utility of ‘Susceptibility Weighted Angiogram’ (SWAN) in brain magnetic resonance imaging (MRI) by identifying venous angiomas causing epileptic seizures.

Method and Materials
A retrospective observational study was performed in the Radiology department at King Fahad Military Medical Complex (KFMC) hospital in Dhahran from January 2016 to 2021. All consecutive adult patients who underwent brain MRIs for epilepsy with SWAN were included. Patients with brain tumors, traumatic brain injuries, and post-surgical cases were excluded. The presence of tuft of small deep parenchymal veins draining into a more prominent (transcortical or subependymal) collector vein as seen on SWAN image was considered a venous angioma and confirmed on either contrast-enhanced studies or cerebral angiograms. Two experienced neuroradiologists interpreted the studies with mutual consensus. The significance of such finding was considered if SWAN-detected venous malformation corresponded to an epileptiform focus on respective electroencephalogram (EEG). Findings were compared with incidentally detected venous angiomas in normal brain MRIs in patients without indications of seizures (control group, n=112). Proportion analysis (Z-test) was used to determine significance.

Results
Out of 112 patients, 64 were females (57%), and 48 were males (43%), with a mean age of 19.24 (range, 5-45 years). Twenty-three patients (epilepsy group) were found to have venous malformations while three (control group) had venous angiomas (Z-value, 3.93; P-value, 0.0008). Out of 23 patients, 20.53% were SWAN-detected venous angiomas, 5 corresponded to epileptiform foci on respective EEGs compared to none of 3 incidentally detected venous angiomas in the control group (p-value, 0.0005).

Conclusion
Venous angiomas are usually asymptomatic when detected incidentally. However, adding a SWAN sequence in routine brain MRI for epilepsy patients may help to detect venous angiomas, which may cause focal seizure activity in these patients.

KeywordsEpilepsyMagnetic Resonance ImagingSusceptibility Weighted Angiogramseizuresbrain

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This work is licensed under a Creative Commons Attribution 4.0 International license

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