RT Journal Article
SR Electronic
T1 Neuroanatomic Markers of Posttraumatic Epilepsy Based on MR Imaging and Machine Learning
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 347
OP 353
DO 10.3174/ajnr.A7436
VO 43
IS 3
A1 H. Akrami
A1 R.M. Leahy
A1 A. Irimia
A1 P.E. Kim
A1 C.N. Heck
A1 A.A. Joshi
YR 2022
UL http://www.ajnr.org/content/43/3/347.abstract
AB BACKGROUND AND PURPOSE: Although posttraumatic epilepsy is a common complication of traumatic brain injury, the relationship between these conditions is unclear and early posttraumatic epilepsy detection and prevention remain major unmet clinical challenges. This study aimed to identify imaging biomarkers that predict posttraumatic epilepsy among survivors of traumatic brain injury on the basis of an MR imaging data set.MATERIALS AND METHODS: We performed tensor-based morphometry to analyze brain-shape changes associated with traumatic brain injury and to derive imaging features for statistical group comparison. Additionally, machine learning was used to identify structural anomalies associated with brain lesions. Automatically generated brain lesion maps were used to identify brain regions where lesion load may indicate an increased incidence of posttraumatic epilepsy. We used 138 non-posttraumatic epilepsy subjects for training the machine learning method. Validation of lesion delineation was performed on 15 subjects. Group analysis of the relationship between traumatic brain injury and posttraumatic epilepsy was performed on an independent set of 74 subjects (37 subjects with and 37 randomly selected subjects without epilepsy).RESULTS: We observed significant F-statistics related to tensor-based morphometry analysis at voxels close to the pial surface, which may indicate group differences in the locations of edema, hematoma, or hemorrhage. The results of the F-test on lesion data showed significant differences between groups in both the left and right temporal lobes. We also saw significant differences in the right occipital lobe and cerebellum.CONCLUSIONS: Statistical analysis suggests that lesions in the temporal lobes, cerebellum, and the right occipital lobe are associated with an increased posttraumatic epilepsy incidence.FDRfalse discovery rateISLESIschemic Stroke Lesion SegmentationMLmachine learningPTEposttraumatic epilepsyROCreceiver operating characteristicTBItraumatic brain injuryTBMtensor-based morphometryVAEVariational Autoencoder