A circuit for synchronizing external stimuli and events to the pulse sequence of a clinical magnetic resonance scanner |
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Authors: | Yujie Qiu Wei Yao Wing‐Chi Edmund Kwok Joseph P Hornak |
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Institution: | 1. Magnetic Resonance Laboratory, Center for Imaging Science, Rochester Institute of Technology, Rochester, NY;2. Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY |
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Abstract: | Interfacing experiments to a clinical magnetic resonance imaging scanner which require synchronization with an imaging pulse sequence can be challenging unless access to a trigger‐out is available. We present a simple, alternative approach to synchronize an experiment to a scanner using an external trigger to drive the scanner through the peripheral optical pulse rate monitor and cardiac trigger available on most clinical imagers. A trigger circuit and pulse rate monitor interface are described for applying a stimulus in the form of a pulsed voltage to a sample at a specific time in a spin‐echo, echo planar imaging sequence. The apparatus and approach could be used for many other types and numbers of experimental stimuli or events. © 2014 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 44B: 50–52, 2014 |
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Keywords: | triggering synchronization pulse sequence circuitry external stimuli clinical MR scanner |
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