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Quantitative positron emission tomography-guided magnetic resonance imaging postprocessing in magnetic resonance imaging-negative epilepsies.
Lin, Yicong; Fang, Yu-Hua Dean; Wu, Guiyun; Jones, Stephen E; Prayson, Richard A; Moosa, Ahsan N V; Overmyer, Margit; Bena, James; Larvie, Mykol; Bingaman, William; Gonzalez-Martinez, Jorge A; Najm, Imad M; Alexopoulos, Andreas V; Wang, Z Irene.
Affiliation
  • Lin Y; Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.
  • Fang YD; Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA.
  • Wu G; Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.
  • Jones SE; Department of Nuclear Medicine, Cleveland Clinic, Cleveland, OH, USA.
  • Prayson RA; Imaging Institute, Cleveland Clinic, Cleveland, OH, USA.
  • Moosa ANV; Department of Pathology, Cleveland Clinic, Cleveland, OH, USA.
  • Overmyer M; Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA.
  • Bena J; Department of Pediatric Neurology, Helsinki University Hospital, Helsinki, Finland.
  • Larvie M; Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, USA.
  • Bingaman W; Department of Nuclear Medicine, Cleveland Clinic, Cleveland, OH, USA.
  • Gonzalez-Martinez JA; Imaging Institute, Cleveland Clinic, Cleveland, OH, USA.
  • Najm IM; Department of Neurosurgery, Cleveland Clinic, Cleveland, OH, USA.
  • Alexopoulos AV; Department of Neurosurgery, Cleveland Clinic, Cleveland, OH, USA.
  • Wang ZI; Epilepsy Center, Cleveland Clinic, Cleveland, OH, USA.
Epilepsia ; 59(8): 1583-1594, 2018 08.
Article in En | MEDLINE | ID: mdl-29953586
ABSTRACT

OBJECTIVE:

Detection of focal cortical dysplasia (FCD) is of paramount importance in epilepsy presurgical evaluation. Our study aims at utilizing quantitative positron emission tomography (QPET) analysis to complement magnetic resonance imaging (MRI) postprocessing by a morphometric analysis program (MAP) to facilitate automated identification of subtle FCD.

METHODS:

We retrospectively included a consecutive cohort of surgical patients who had a negative preoperative MRI by radiology report. MAP was performed on T1-weighted volumetric sequence and QPET was performed on PET/computed tomographic data, both with comparison to scanner-specific normal databases. Concordance between MAP and QPET was assessed at a lobar level, and the significance of concordant QPET-MAP+ abnormalities was confirmed by postresective seizure outcome and histopathology. QPET thresholds of standard deviations (SDs) of -1, -2, -3, and -4 were evaluated to identify the optimal threshold for QPET-MAP analysis.

RESULTS:

A total of 104 patients were included. When QPET thresholds of SD = -1, -2, and -3 were used, complete resection of the QPET-MAP+ region was significantly associated with seizure-free outcome when compared with the partial resection group (P = 0.023, P < 0.001, P = 0.006) or the no resection group (P = 0.002, P < 0.001, P = 0.001). The SD threshold of -2 showed the best combination of positive rate (55%), sensitivity (0.68), specificity (0.88), positive predictive value (0.88), and negative predictive value (0.69). Surgical pathology of the resected QPET-MAP+ areas revealed mainly FCD type I. Multiple QPET-MAP+ regions were present in 12% of the patients at SD = -2.

SIGNIFICANCE:

Our study demonstrates a practical and effective approach to combine quantitative analyses of functional (QPET) and structural (MAP) imaging data to improve identification of subtle epileptic abnormalities. This approach can be readily adopted by epilepsy centers to improve postresective seizure outcomes for patients without apparent lesions on MRI.
Subject(s)
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Magnetic Resonance Imaging / Positron-Emission Tomography / Epilepsy Type of study: Etiology_studies / Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limits: Adolescent / Adult / Aged / Child / Child, preschool / Female / Humans / Male / Middle aged Language: En Journal: Epilepsia Year: 2018 Type: Article Affiliation country: China

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Magnetic Resonance Imaging / Positron-Emission Tomography / Epilepsy Type of study: Etiology_studies / Incidence_studies / Observational_studies / Prognostic_studies / Risk_factors_studies Limits: Adolescent / Adult / Aged / Child / Child, preschool / Female / Humans / Male / Middle aged Language: En Journal: Epilepsia Year: 2018 Type: Article Affiliation country: China