- Poster presentation
- Open Access
Operator-guided Navigator Gating for Real-Time Interactive Coronary Cardiovascular Magnetic Resonance
© Kawaji et al. 2016
- Published: 27 January 2016
- Cardiovascular Magnetic Resonance
- Sharpness Score
- Repeated Acquisition
- Parameter Manipulation
- Scan Time Reduction
Real-time interactive (RTI) MRI parameter manipulation during the scan  may potentially address challenges imposed by respiratory motion during a free-breathing cardiovascular magnetic resonance (CMR) acquisition. In this study, we propose an operator-guided processing that allows manipulation of navigator gating parameters in real-time. This approach was evaluated in healthy volunteers, where coronary CMR (CCMR) with and without RTI manipulation was examined to assess acquisition failure rates, scan time reduction, and vessel sharpness.
The proposed RTI framework employs a custom communication protocol between the scanner host and the waveform generation hardware that allows non-time-critical operator tasks (ie. made changes are reflected in the next collected heart beat without overtasking the scan runtime). The custom front-end (Figure 1a) shows the operator-interactive navigator control that allows manipulation of the diaphragm navigator gating window in real-time (Figure 1b).
The feasibility of RTI manipulation between waveform generator and host console during MRI data acquisition was successfully demonstrated without need for additional dedicated research hardware. RTI operator-guided manipulation of the navigator gating window eliminated repeated acquisitions of 3D CCMR sequences in all 13 subjects, while achieving ~70 fewer HBs, ~8% NavEff increase, and improved/comparable sharpness compared to conventional non-RTI CCMRs.
- Kawaji , et al: MRM. 2014Google Scholar
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