Abstract
Background
Gadoxetate disodium, utilized in hepatobiliary magnetic resonance (MR) imaging, has been associated with transient respiratory motion during the arterial phase in adults.
Objective
The purpose of this study was to determine the presence and severity of this phenomenon in children imaged awake versus under general anesthesia.
Materials and methods
This retrospective cohort study was approved by the institutional review board; informed consent was waived. One hundred thirty exams of children ≤18 years old who underwent dynamic liver MR imaging with gadoxetate disodium between October 2010 and January 2018 were reviewed. Three pediatric radiologists scored respiratory motion artifacts on all imaging phases using a 5-point Likert scale. Differences in mean motion scores were assessed with analysis of variance and Tukey’s multiple comparisons test, and multivariable regression was used to identify predictors of arterial phase motion in awake patients.
Results
One hundred thirty patients (50% [n=65] female; mean age: 9.8±3.7 years, 48.5% [n=63] awake) were included. There were significant differences in mean motion scores between phases in the awake cohort (P<0.0001) but not in the general anesthesia cohort (P=0.051). In the awake cohort, arterial phase motion score (mean: 3.52±0.83) was significantly higher than mean motion score in all other phases (P≤0.0003). There were no significant patient-specific predictors of arterial phase motion score in the awake cohort.
Conclusion
Significantly increased arterial phase respiratory motion artifact in awake children undergoing dynamic liver MR imaging with gadoxetate disodium suggests that transient respiratory motion occurs in children. General anesthesia may suppress this phenomenon.
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Dr. Trout is a consultant for Guerbet Group, is part of the Speakers Bureau for Applied Radiology, and receives honoraria for authorship from Reed Elsevier and Wolters Kluwer. Dr. Dillman and Dr. Towbin receive grant funding from Guerbet Group.
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Gilligan, L.A., Trout, A.T., Anton, C.G. et al. Respiratory motion in children and young adults undergoing liver magnetic resonance imaging with intravenous gadoxetate disodium contrast material. Pediatr Radiol 49, 1171–1176 (2019). https://doi.org/10.1007/s00247-019-04437-x
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DOI: https://doi.org/10.1007/s00247-019-04437-x