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Neuropediatrics 2012; 43(05): 249-257
DOI: 10.1055/s-0032-1324731
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Identification of Successful Clinical fMRI Sessions in Children: An Objective Approach

Andrea Zsoter
1   Department of Pediatric Neurology and Developmental Medicine, University of Tübingen, Children's Hospital, Germany
2   Experimental Pediatric Neuroimaging, Department of Neuroradiology, University of Tübingen, Children's Hospital, Germany
3   Clinic for Neuropediatrics and Neurorehabilitation, Epilepsy Center for Children and Adolescents, Schön Klinik Vogtareuth, Germany
,
Martin Staudt
1   Department of Pediatric Neurology and Developmental Medicine, University of Tübingen, Children's Hospital, Germany
3   Clinic for Neuropediatrics and Neurorehabilitation, Epilepsy Center for Children and Adolescents, Schön Klinik Vogtareuth, Germany
,
Marko Wilke
1   Department of Pediatric Neurology and Developmental Medicine, University of Tübingen, Children's Hospital, Germany
2   Experimental Pediatric Neuroimaging, Department of Neuroradiology, University of Tübingen, Children's Hospital, Germany
› Institutsangaben
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Publikationsverlauf

08. Dezember 2011

29. Mai 2012

Publikationsdatum:
23. September 2012 (online)

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Abstract

Purpose The term clinical functional magnetic resonance imaging (fMRI) describes an examination with direct clinical impact on the patient. Interpretation of clinical fMRI especially in children, however, is often difficult due to suboptimal data quality. The current gold standard is standardized visual evaluation. To evaluate such data in an automated and objective way, we developed an approach to identify successful sessions.

Methods Average activation inside a predefined, task-specific region of interest (ROI) is compared with average activation in the rest of the brain, and their ratio (classification factor [F c]) is determined for different statistical thresholds (T). The approach was tested and validated using 239 clinical pediatric fMRI sessions (sensorimotor, perceptive /productive language). Performance was assessed in terms of sensitivity, specificity, and positive likelihood ratio.

Results Best performance was found for F c ≥ 2 and T ≥ 2.5, achieving a sensitivity of 0.87 and specificity of 0.94. Comparing the different domains, sensitivity was lowest for language production tasks, mainly due to atypical activation foci.

Conclusion We demonstrate that an objective, automated framework for the classification of clinical pediatric fMRI sessions may provide important additional information, supporting visual evaluation, especially from sensorimotor and language perception domains. In the current form, atypical or strong network activation is not easily captured.

Keywords

pediatric functional MRI - clinical fMRI - objective analysis
 

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