Motion‐insensitive susceptibility weighted imaging
نویسندگان
چکیده
Purpose To enable SWI that is robust to severe head movement. Methods Prospective motion correction using a markerless optical tracker was applied all pulse sequences. Three-dimensional gradient-echo and 3D EPI were used as reference sequences, but expected be sensitive motion-induced B0 changes, the long TE required for allows phase discrepancies accumulate between shots. Therefore, 2D interleaved snapshot investigated motion-robust compared with conventional EPI. Repeated signal averages retrospectively corrected motion. The sequences evaluated at 3 T through controlled experiments involving two cooperative volunteers of tumor patient. Results performed continuous in range 5–8° rotations. image quality poor unless rotational axis parallel B0. Interleaved had minimal intraslice due its small temporal footprint. Phase inconsistency well tolerated high-pass filter effect processing. prospective retrospective demonstrated similar quality, regardless whether present. Lesion depiction equal matching resolution. Conclusion Susceptibility-based imaging can severely corrupted by movement despite accurate correction. superior alternative patients who are prone move offers which insensitive when combined
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2021
ISSN: ['0740-3194', '1522-2594']
DOI: https://doi.org/10.1002/mrm.28850