Consensus recommendations for MS cortical lesion scoring using double inversion recovery MRI
Abstract
Background:
Different double inversion recovery (DIR) sequences are currently used in multiple sclerosis (MS) research centers to visualize cortical lesions, making it difficult to compare published data. This study aimed to formulate consensus recommendations for scoring cortical lesions in patients with MS, using DIR images acquired in 6 European centers according to local protocols.
Methods:
Consensus recommendations were formulated and tested in a multinational meeting.
Results:
Cortical lesions were defined as focal abnormalities on DIR, hyperintense compared to adjacent normal-appearing gray matter, and were not scored unless ≥3 pixels in size, based on at least 1.0 mm2 in-plane resolution. Besides these 2 obligatory criteria, additional, supportive recommendations concerned a priori artifact definition on DIR, use of additional MRI contrasts to verify suspected lesions, and a constant level of displayed image contrast. Robustness of the recommendations was tested in a small dataset of available, heterogeneous DIR images, provided by the different participating centers. An overall moderate agreement was reached when using the proposed recommendations: more than half of the readers agreed on slightly more than half (54%) of the cortical lesions scored, whereas complete agreement was reached in 19.4% of the lesions (usually larger, mixed white matter/gray matter lesions).
Conclusions:
Although not designed as a formal interobserver study, the current study suggests that comparing available literature data on cortical lesions may be problematic, and increased consistency in acquisition protocols may improve scoring agreement. Sensitivity and specificity of the proposed recommendations should now be studied in a more formal, prospective, multicenter setting using similar DIR protocols.
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COINVESTIGATORS
The current work was conducted on behalf of the MAGNIMS Study Group. The following Contributors provided patient data and discussed the contents and interpretation of the study: F. Barkhof, MD (Department of Radiology, VU University Medical Centre, Amsterdam, the Netherlands); X. Montalban, MD (Clinical Neuroimmunology Unit, Multiple Sclerosis Centre of Catalonia, Hospital Vall d'Hebron, Barcelona, Spain); N. de Stefano, MD (Department of Neurological and Behavioral Sciences, University of Siena, Siena, Italy); F. Fazekas, MD (Department of Neurology, Medical University Graz, Graz, Austria); M. Filippi, MD (Neuroimaging Research Unit, Department of Neurology, Scientific Institute and University, Ospedale San Raffaele, Milan, Italy); J. Frederiksen, MD (MS Clinic, Department of Neurology, University of Copenhagen, Glostrup Hospital, Denmark); L. Kappos, MD (Department of Neurology, University Hospital, Kantonsspital, Basel, Switzerland); D. Miller, MD (NMR Research Unit, Institute of Neurology, University College London, London, UK); J. Palace, MD (Centre for Functional Magnetic Resonance Imaging of the Brain, University of Oxford, UK); C.H. Polman, MD (Department of Neurology, VU University Medical Centre, Amsterdam, the Netherlands); M. Rovaris, MD (U.O. Sclerosi Multipla, IRCCS S. Maria Nascente, Fondazione Don Gnocchi, Milan, Italy); M. Rocca, MD (Neuroimaging Research Unit, Department of Neurology, Scientific Institute and University, Ospedale San Raffaele, Milan, Italy); A. Rovira, MD (Department of Radiology, Magnetic Resonance Unit, Hospital Vall d'Hebron, Barcelona, Spain); A. Thompson, MD (NMR Research Unit, Institute of Neurology, University College London, London, UK); T. Yousry, MD (NMR Research Unit, Institute of Neurology, University College London, London, UK).
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Information & Authors
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Copyright © 2011 by AAN Enterprises, Inc.
Publication History
Received: May 18, 2010
Accepted: August 30, 2010
Published online: January 5, 2011
Published in print: February 1, 2011
Disclosure
Dr. Geurts serves on scientific advisory boards for the Dutch MS Research Foundation and Merck Serono, and serves on the editorial board of MS International. Dr. Roosendaal receives research support from the Dutch MS Research Foundation (06–592). Dr. Calabrese reports no disclosures. Dr. Ciccarelli serves as Clinical Editor for Current Medical Literature–Multiple Sclerosis and receives support from UCLH/UCL Comprehensive Biomedical Research Centre, MS Society, and the Wellcome Trust (Advanced Fellow). Dr. Agosta serves on the speakers' bureau for Bayer Schering Pharma and has received funding for travel and speaker honoraria from Bayer Schering Pharma and Teva Pharmaceutical Industries Ltd. Dr. Chard receives research support from the Multiple Sclerosis Society Great Britain and Northern Ireland and holds stock in GlaxoSmithKline. Dr. Gass serves on the editorial board of Cerebrovascular Diseases. Dr. Huerga, Dr. Moraal, Dr. Pareto, and Dr. Rocca report no disclosures. Dr. Wattjes has received funding for travel and speaker honoraria from Bayer Schering Pharma, Janssen, and Biogen Idec. Dr. Yousry has served on scientific advisory boards for UCB and Biogen Idec; serves on the editorial board of European Radiology; and receives research support from Novartis, Biogen Idec, GlaxoSmithKline, Medical Research Council, PSP Association, Stroke Association, British Heart Foundation, and Wellcome Trust. Dr. Uitdehaag serves on a scientific advisory board for Merck Serono; served on the editorial board for Tijdschrift voor Neurologie en Neurochirurgie; receives royalties from the publication of Evidence-Based Neurology (Blackwell Publishers, 2007); serves as a consultant for Danone Research; and has received research support from the Dutch MS Research Foundation. Dr. Barkhof serves on scientific advisory boards for Lundbeck Inc., Bayer Schering Pharma, Sanofi- Aventis, UCB, Novartis, Biogen Idec, BioMS Medical, Merck Serono, and GE Healthcare; serves on the editorial boards of Brain, the Journal of Neurology, Neurosurgery, and Psychiatry, European Radiology, the Journal of Neurology, and Neuroradiology; has received speaker honoraria from Novartis, Merck Serono, and BioClinica; serves as a consultant for Sanofi-Aventis, UCB, Novartis, Biogen Idec, BioMS Medical, Medicinova, Inc., and GE Healthcare. The VUmc MS Center Amsterdam receives research support from the Dutch MS Research Foundation.
Authors
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Statistical analysis was conducted by Dr. J.J.G. Geurts and Dr. B.M.J. Uitdehaag.
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