title: Presurgical motor, somatosensory and language fMRI: Technical feasibility and limitations in 491 patients over 13 years.
abstract: OBJECTIVE
  To analyse the long-term feasibility and limitations of presurgical fMRI in a cohort of tumour and epilepsy patients with different MR-scanners at 1.5 and 3.0 T.
  
  
  METHODS
  Four hundred and ninety-one consecutive patients undergoing presurgical fMRI between 2000 and 2012 on five different MR-scanners using established paradigms and semi-automated data processing were included. Success rates of task performance and BOLD-activation were determined for motor and somatosensory somatotopic mapping and language localisation. Procedural success, failures and imaging artifacts were analysed. MR-field strengths were compared.
  
  
  RESULTS
  Two thousand three hundred fifteen of 2348 (98.6 %) attempted paradigms (1033 motor, 1220 speech, 95 somatosensory) were successfully performed. 100 paradigms (4.3 %) were repetition runs. 23 speech, 6 motor and 2 sensory paradigms failed for non-compliance and technical issues. Most language paradigm failures were noted in overt sentence generation. Average significant BOLD-activation was higher for motor than language paradigms (95.8 vs. 81.6 %). Most language paradigms showed significantly higher activation rates at 3 T compared to 1.5 T, whereas no significant difference was found for motor paradigms.
  
  
  CONCLUSIONS
  fMRI proved very robust for the presurgical localisation of the different motor and somatosensory body representations, as well as Broca's and Wernicke's language areas across different MR-scanners at 1.5 and 3.0 T over 13 years.
  
  
  CONCLUSIONS
  • Standardised presurgical motor and language fMRI is robust across various MRI platforms. • Motor fMRI is less dependent on field strength than language fMRI. • fMRI task failures are relatively low and are reduced by paradigm repetition.
authors.affiliation: Division of Diagnostic and Interventional Neuroradiology, University Hospital Basel, Basel, Switzerland.
authors.forename: Anthony J
authors.initials: AJ
authors.lastname: Tyndall
authors.affiliation: Division of Diagnostic and Interventional Neuroradiology, University Hospital Basel, Basel, Switzerland.
authors.forename: Julia
authors.initials: J
authors.lastname: Reinhardt
authors.affiliation: Department of Neurosurgery, University Hospital Schleswig-Holstein, Luebeck Campus, Luebeck, Germany.
authors.forename: Volker
authors.initials: V
authors.lastname: Tronnier
authors.affiliation: Department of Neurosurgery, University Hospitals Basel, Basel, Switzerland.
authors.forename: Luigi
authors.initials: L
authors.lastname: Mariani
authors.affiliation: Division of Diagnostic and Interventional Neuroradiology, University Hospital Basel, Basel, Switzerland. Christoph.Stippich@usb.ch.
authors.forename: Christoph
authors.initials: C
authors.lastname: Stippich
mesh_terms: D000293:Adolescent; D000328:Adult; D016477:Artifacts; D001931:Brain Mapping / Q000379:methods*; D001932:Brain Neoplasms / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D004827:Epilepsy / Q000473:pathology / Q000503:physiopathology / Q000601:surgery*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D007802:Language; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D011300:Preoperative Care / Q000379:methods; D012189:Retrospective Studies; D013003:Somatosensory Cortex / Q000503:physiopathology*; D055815:Young Adult
keywords: Brain tumour; Functional MRI; Language; Motor; Somatosensory