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Functional perfusion imaging using continuous arterial spin labeling with separate labeling and imaging coils at 3 T
Toralf Mildner1, Robert Trampel, Harald E Möller
1Max Planck Institute of Cognitive Neuroscience, Leipzig, Germany. mildner@cns.mpg.de
Magnetic Resonance in Medicine
|April 22, 2003
Summary
This study demonstrates functional perfusion imaging in human volunteers using a novel labeling coil. The technique detected subtle brain signal changes during a finger-tapping task, showing its potential for neuroscience research.
Area of Science:
- Neuroimaging
- Physiology
- Medical Physics
Background:
- Functional perfusion imaging is crucial for understanding brain activity.
- Previous methods faced challenges with transit time effects and sampling intervals.
- Developing advanced neuroimaging techniques is essential for detailed brain studies.
Purpose of the Study:
- To demonstrate functional perfusion imaging in human volunteers at 3 Tesla.
- To evaluate a novel labeling coil positioned above the common carotid artery.
- To assess brain signal changes during a motor task.
Main Methods:
- Utilized a helmet resonator and spin-echo echo-planar imaging (EPI) sequence.
- Employed a 6 cm inner diameter circular surface coil for arterial spin labeling.
- Subjects performed a finger-tapping task while data was acquired.
- Implemented a long post-label delay (PLD) and continuous labeling to minimize artifacts.
Main Results:
- Functional perfusion imaging was successfully demonstrated in human participants.
- Observed signal differences between finger-tapping and rest ranged from -0.5% to -1.1%.
- The protocol effectively reduced transit time effects and sampling intervals.
Conclusions:
- The developed functional perfusion imaging technique is feasible in human volunteers.
- The method shows promise for detecting task-related brain activity.
- This approach offers a potential advancement in non-invasive neuroimaging.