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Erschienen in: Neuroradiology 3/2018

04.01.2018 | Functional Neuroradiology

Reducing task-based fMRI scanning time using simultaneous multislice echo planar imaging

verfasst von: Máté Kiss, Petra Hermann, Zoltán Vidnyánszky, Viktor Gál

Erschienen in: Neuroradiology | Ausgabe 3/2018

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Abstract

Purpose

To maintain alertness and to remain motionless during scanning represent a substantial challenge for patients/subjects involved in both clinical and research functional magnetic resonance imaging (fMRI) examinations. Therefore, availability and application of new data acquisition protocols allowing the shortening of scan time without compromising the data quality and statistical power are of major importance.

Methods

Higher order category-selective visual cortical areas were identified individually, and rapid event-related fMRI design was used to compare three different sampling rates (TR = 2000, 1000, and 410 ms, using state-of-the-art simultaneous multislice imaging) and four different scanning lengths to match the statistical power of the traditional scanning methods to high sampling-rate design.

Results

The results revealed that ~ 4 min of the scan time with 1 Hz (TR = 1000 ms) sampling rate and ~ 2 min scanning at ~ 2.5 Hz (TR = 410 ms) sampling rate provide similar localization sensitivity and selectivity to that obtained with 11-min session at conventional, 0.5 Hz (TR = 2000 ms) sampling rate.

Conclusion

Our findings suggest that task-based fMRI examination of clinical population prone to distress such as presurgical mapping experiments might substantially benefit from the reduced (20–40%) scanning time that can be achieved by the application of simultaneous multislice sequences.
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Metadaten
Titel
Reducing task-based fMRI scanning time using simultaneous multislice echo planar imaging
verfasst von
Máté Kiss
Petra Hermann
Zoltán Vidnyánszky
Viktor Gál
Publikationsdatum
04.01.2018
Verlag
Springer Berlin Heidelberg
Erschienen in
Neuroradiology / Ausgabe 3/2018
Print ISSN: 0028-3940
Elektronische ISSN: 1432-1920
DOI
https://doi.org/10.1007/s00234-017-1962-4

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