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Wang X, Hu W, Shao X, Zheng Z, Ai L, Sang L, Zhang C, Zhang JG, Zhang K. Hypometabolic patterns of focal cortical dysplasia in PET-MRI co-registration imaging: a retrospective evaluation in a series of 83 patients. Front Neurosci 2023; 17:1173534. [PMID: 37817803 PMCID: PMC10561385 DOI: 10.3389/fnins.2023.1173534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 09/06/2023] [Indexed: 10/12/2023] Open
Abstract
Objective To characterize the PET-MRI co-registration of hypometabolic patterns in focal cortical dysplasia (FCD) types I and II and provide some suggestions in presurgical evaluation of epilepsy surgery. Methods We retrospectively analyzed PET-MRI co-registration imaging data from a cohort of 83 epilepsy patients with histologically confirmed FCD types I and II. Hypometabolic patterns were classified into 4 types: bottom of sulcus hypometabolism (BOSH), single island of sulcus hypometabolism (SIOS), single gyrus or sulcus hypometabolism (SGOS), and multiple gyri and sulci hypometabolism (MGOS). Results Most of cases that were overlooked by conventional MRI and PET evaluation but positive in PET-MRI co-registration were focalized lesions in dorsolateral frontal lobe (9/15) and FCD type IIa was the most prevalent pathological type (11/15). The FCD histological types (p = 0.027) and locations (p < 0.001) were independent predictors of PET-MRI co-registration hypometabolic patterns. Focalized hypometabolic patterns (BOSH, SIOS, SGOS) were primarily observed in the frontal lobe (33/39) and FCD type II (43/62) and extensive pattern (MGOS) in temporal lobe (18/20) and FCD type I (16/21; p < 0.005). Conclusion PET-MRI co-registration enhanced the detection of FCD type IIa compared with conventional MRI and PET reading. The hypometabolic patterns of FCD type I and temporal lobe FCD were more extensive than those of FCD type II and frontal lobe FCD, respectively. The predilection of focalized hypometabolic patterns in frontal lobe FCD suggested that subtle lesions should be checked carefully in patients with suspected frontal lobe epilepsy.
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Affiliation(s)
- Xiu Wang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Wenhan Hu
- Stereotactic and Functional Neurosurgery Laboratory, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Neurostimulation, Beijing, China
| | - Xiaoqiu Shao
- Department of Neurology, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Zhong Zheng
- Epilepsy Center, Medical Alliance of Beijing Tian Tan Hospital, Peking University First Hospital Fengtai Hospital, Beijing, China
| | - Lin Ai
- Department of Nuclear Medicine, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
| | - Lin Sang
- Epilepsy Center, Medical Alliance of Beijing Tian Tan Hospital, Peking University First Hospital Fengtai Hospital, Beijing, China
| | - Chao Zhang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Neurostimulation, Beijing, China
| | - Jian-guo Zhang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Stereotactic and Functional Neurosurgery Laboratory, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Neurostimulation, Beijing, China
| | - Kai Zhang
- Department of Neurosurgery, Beijing Tian Tan Hospital, Capital Medical University, Beijing, China
- Beijing Key Laboratory of Neurostimulation, Beijing, China
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Garibotto V, Trombella S, Antelmi L, Bosco P, Redolfi A, Tabouret-Viaud C, Rager O, Gold G, Giannakopoulos P, Morbelli S, Nobili F, Perneczky R, Didic M, Guedj E, Drzezga A, Ossenkoppele R, Berckel BV, Ratib O, Frisoni GB. A Comparison of Two Statistical Mapping Tools for Automated Brain FDG-PET Analysis in Predicting Conversion to Alzheimer's Disease in Subjects with Mild Cognitive Impairment. Curr Alzheimer Res 2021; 17:1186-1194. [PMID: 33583380 DOI: 10.2174/1567205018666210212162443] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 10/24/2020] [Accepted: 12/28/2020] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Automated voxel-based analysis methods are used to detect cortical hypometabolism typical of Alzheimer's Disease (AD) on FDG-PET brain scans. We compared the accuracy of two clinically validated tools for their ability to identify those MCI subjects progressing to AD at followup, to evaluate the impact of the analysis method on FDG-PET diagnostic performance. METHODS SPMGrid and BRASS (Hermes Medical Solutions, Stockholm, Sweden) were tested on 131 MCI and elderly healthy controls from the EADC PET dataset. The concordance between the tools was tested by correlating the quantitative parameters (z- and t-values), calculated by the two software tools, and by measuring the topographical overlap of the abnormal regions (Dice score). Three independent expert readers blindly assigned a diagnosis based on the two map sets. We used conversion to AD dementia as the gold standard. RESULTS The t-map and z-map calculated with SPMGrid and BRASS, respectively, showed a good correlation (R > .50) for the majority of individual cases (128/131) and for the majority of selected regions of interest (ROIs) (98/116). The overlap of the hypometabolic patterns from the two tools was, however, poor (Dice score .36). The diagnostic performance was comparable, with BRASS showing significantly higher sensitivity (.82 versus .59) and SPMGrid showing higher specificity (.87 versus .52). CONCLUSION Despite similar diagnostic performance in predicting conversion to AD in MCI subjects, the two tools showed significant differences, and the maps provided by the tools showed limited overlap. These results underline the urgency for standardization across FDG-PET analysis methods for their use in clinical practice.
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Affiliation(s)
- Valentina Garibotto
- Laboratory of Neuroimaging and Innovative Molecular Tracer, University of Geneva, Geneva, Switzerland
| | - Sara Trombella
- Laboratory of Neuroimaging and Innovative Molecular Tracer, University of Geneva, Geneva, Switzerland
| | - Luigi Antelmi
- University of Cote d'Azur, Inria Sophia Antipolis, Epione Research Project, Nice, France
| | - Paolo Bosco
- IRCCS Fondazione Stella Maris, Viale del Tirreno 331, Pisa, Italy
| | - Alberto Redolfi
- Laboratory of Neuroinformatics, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
| | - Claire Tabouret-Viaud
- Division of Nuclear Medicine and Molecular Imaging, Diagnostic Department, University Hospitals of Geneva, Geneva, Switzerland
| | - Olivier Rager
- Division of Nuclear Medicine and Molecular Imaging, Diagnostic Department, University Hospitals of Geneva, Geneva, Switzerland
| | | | | | - Silvia Morbelli
- Department of Nuclear Medicine, IRCCS AOU San Martino-IST, University of Genoa, Genoa, Italy
| | - Flavio Nobili
- Department of Nuclear Medicine, IRCCS AOU San Martino-IST, University of Genoa, Genoa, Italy
| | - Robert Perneczky
- Department of Psychiatry and Psychotherapy, Ludwig, Maximilians-Universitaet Muenchen, Munich, Germany
| | - Mira Didic
- Aix-Marseille Universite, CNRS, Ecole Centrale Marseille, UMR 7249, Institut Fresnel, Marseille, France
| | - Eric Guedj
- Aix-Marseille Universite, CNRS, Ecole Centrale Marseille, UMR 7249, Institut Fresnel, Marseille, France
| | - Alexander Drzezga
- Department of Nuclear Medicine, Technische Universitaet, Munich, Germany
| | - Rik Ossenkoppele
- Department of Nuclear Medicine and PET Research, VU University Medical Center, Amsterdam, Netherlands
| | - Bart Van Berckel
- Department of Nuclear Medicine and PET Research, VU University Medical Center, Amsterdam, Netherlands
| | - Osman Ratib
- Division of Nuclear Medicine and Molecular Imaging, Diagnostic Department, University Hospitals of Geneva, Geneva, Switzerland
| | - Giovanni B Frisoni
- Laboratory of Neuroimaging of Aging, University of Geneva, Geneva, Switzerland
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