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Assessment of velopharyngeal function with dual‐planar high‐resolution real‐time spiral dynamic MRI
Author(s) -
Feng Xue,
Blemker Silvia S.,
Inouye Josh,
Pelland Catherine M.,
Zhao Li,
Meyer Craig H.
Publication year - 2018
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.27139
Subject(s) - temporal resolution , computer science , dynamic contrast enhanced mri , real time mri , spiral (railway) , planar , image resolution , echo planar imaging , dynamic imaging , computer vision , image quality , artificial intelligence , magnetic resonance imaging , image processing , physics , image (mathematics) , mathematics , optics , medicine , radiology , digital image processing , mathematical analysis , computer graphics (images)
Purpose To develop a real‐time dynamic MRI method for comprehensive evaluation of velum movement during speech. Methods Dynamic MRI has been used to study velopharyngeal insufficiency (VPI) by imaging the movement of the velum during speech, because it can provide good anatomic details with no exposed radiation. To be able to comprehensively evaluate dynamic velum movement, a real‐time spiral non‐balanced SSFP sequence was developed with simultaneous dual‐planar coverage and improved spatial and temporal resolution using a combination of parallel imaging and spatial and temporal compressed sensing to achieve 6 × acceleration. New off‐resonance correction and post‐processing methods were also developed to reduce blurring and slice crosstalk. Results The method demonstrated good image quality for visualizing dynamic velum movement with reduced blurring and improved image homogeneity. Spatial resolution of 1.2*1.2 mm 2 with 150 mm FOV and temporal resolution of 20 frames‐per‐second with simultaneous dual‐planar coverage was achieved. Conclusions This work describes a new technique for studying speech disorders using dual‐planar accelerated spiral dynamic MRI.