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Real-time distortion correction of spiral MRI using the gradient system impulse response function
| Content Provider | Semantic Scholar |
|---|---|
| Author | Campbell-Washburn, Adrienne E. Lederman, Robert J. Faranesh, Anthony Z. Hansen, Michael Schacht |
| Copyright Year | 2013 |
| Abstract | PURPOSE MR-guided cardiovascular interventions require imaging sequences that are fast, interactive and low SAR, when using conductive devices. Spiral trajectories use fewer RF pulses with longer readouts [1], making them particularly efficient with respect to SAR and SNR. However, imperfections in magnetic field gradient waveforms are problematic for non-Cartesian readouts and can lead to image distortions [2]. In addition, blurring caused by off-resonance effects during long readouts needs to be corrected during reconstruction [3,4]. In the context of interventional procedures, these corrections must be made in real-time, and it is therefore not practical to measure true k-space trajectories and field maps in each arbitrary image orientation. In this abstract, we present a real-time spiral imaging platform for MR-guided interventions with k-space trajectory correction from a one-time measured gradient system impulse response function (GIRF)[5] and interactive off-resonance reconstruction. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://cds.ismrm.org/protected/14MProceedings/files/2319.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
