Qualitative and Quantitative Hippocampal MRI Assessments in Intractable Epilepsy

Table 3

Comparison of qualitative and quantitative MRI assessments in cases of TLE (𝑛=20).

(a)  

EEG localization	Number of patients having MRI findings in concordance with EEG
	Visual analysis	Hippocampal volumetry	T2 relaxometry
Right TLE; (𝑛=8)	8	8	8
Left TLE**; (𝑛=8)	5	5	5
Bitemporal*; (𝑛=4)	—	2	1

∗EEG localized 4 cases as of bitemporal origin. Out of these 4 cases, 2 had dominant focus on right side and were grouped earlier under right TLE and 2 had dominant focus on left side and were grouped earlier under left TLE.
∗∗Of the 8 left TLE patients (as localized by EEG), only 5 had MRI findings in concordance with EEG; the rest of the 3 patients had diagnosis of right MTS, FCD left parietal lobe, and calcified granuloma left centrum semiovale on MRI.

(b)  

	Visual analysis	Hippocampal volumetry	T2 relaxometry
Number of patients having MRI findings in concordance with EEG	13	15	14
Percentage concordance with EEG	65%	75%	70%