TY - JOUR
T1 - Hippocampal volumetric integrity in mesial temporal lobe epilepsy
T2 - A fast novel method for analysis of structural MRI
AU - Hakimi, Mathew
AU - Ardekani, Babak A.
AU - Pressl, Christina
AU - Blackmon, Karen
AU - Thesen, Thomas
AU - Devinsky, Orrin
AU - Kuzniecky, Ruben I.
AU - Pardoe, Heath R.
N1 - Publisher Copyright:
© 2019
PY - 2019/8
Y1 - 2019/8
N2 - Objective: We investigate whether a rapid and novel automated MRI processing technique for assessing hippocampal volumetric integrity (HVI)can be used to identify hippocampal sclerosis (HS)in patients with mesial temporal lobe epilepsy (mTLE)and determine its performance relative to hippocampal volumetry (HV)and visual inspection. Methods: We applied the HVI technique to T1-weighted brain images from healthy control (n = 35), mTLE (n = 29), non-HS temporal lobe epilepsy (TLE, n = 44), and extratemporal focal epilepsy (EXTLE, n = 25)subjects imaged using a standardized epilepsy research imaging protocol and on non-standardized clinically acquired images from mTLE subjects (n = 40)to investigate if the technique is translatable to clinical practice. Performance of HVI, HV, and visual inspection was assessed using receiver operating characteristic (ROC)analysis. Results: mTLE patients from both research and clinical groups had significantly reduced ipsilateral HVI relative to controls (effect size: -0.053, 5.62%, p = 0.002 using a standardized research imaging protocol). For lateralizing mTLE, HVI had a sensitivity of 88% compared with a HV sensitivity of 92% when using specificity equal to 70%. Conclusions: The novel HVI approach can effectively detect HS in clinical populations, with an average image processing time of less than a minute. The fast processing speed suggests this technique could have utility as a quantitative tool to assist with imaging-based diagnosis and lateralization of HS in a clinical setting.
AB - Objective: We investigate whether a rapid and novel automated MRI processing technique for assessing hippocampal volumetric integrity (HVI)can be used to identify hippocampal sclerosis (HS)in patients with mesial temporal lobe epilepsy (mTLE)and determine its performance relative to hippocampal volumetry (HV)and visual inspection. Methods: We applied the HVI technique to T1-weighted brain images from healthy control (n = 35), mTLE (n = 29), non-HS temporal lobe epilepsy (TLE, n = 44), and extratemporal focal epilepsy (EXTLE, n = 25)subjects imaged using a standardized epilepsy research imaging protocol and on non-standardized clinically acquired images from mTLE subjects (n = 40)to investigate if the technique is translatable to clinical practice. Performance of HVI, HV, and visual inspection was assessed using receiver operating characteristic (ROC)analysis. Results: mTLE patients from both research and clinical groups had significantly reduced ipsilateral HVI relative to controls (effect size: -0.053, 5.62%, p = 0.002 using a standardized research imaging protocol). For lateralizing mTLE, HVI had a sensitivity of 88% compared with a HV sensitivity of 92% when using specificity equal to 70%. Conclusions: The novel HVI approach can effectively detect HS in clinical populations, with an average image processing time of less than a minute. The fast processing speed suggests this technique could have utility as a quantitative tool to assist with imaging-based diagnosis and lateralization of HS in a clinical setting.
KW - Hippocampal sclerosis
KW - Hippocampal volumetric integrity
KW - Hippocampal volumetry
KW - Magnetic resonance imaging
KW - Temporal lobe epilepsy
UR - http://www.scopus.com/inward/record.url?scp=85066278162&partnerID=8YFLogxK
U2 - 10.1016/j.eplepsyres.2019.05.014
DO - 10.1016/j.eplepsyres.2019.05.014
M3 - Article
C2 - 31153104
AN - SCOPUS:85066278162
SN - 0920-1211
VL - 154
SP - 157
EP - 162
JO - Epilepsy Research
JF - Epilepsy Research
ER -