Abstract
Purpose
To determine whether patients undergoing multiple gadoxetate disodium-enhanced magnetic resonance (MR) examinations who experienced transient severe motion (TSM) in the arterial phase were affected by the TSM noted in the first examination.
Materials and methods
214 patients who underwent three or more repeated gadoxetate disodium-enhanced MR imaging were retrospectively analyzed. Three radiologists scored all of the examinations demonstrating a motion artifact using a five-point rating scale. Risk factor analysis and comparison of TSM recurrence rates were performed in the whole study population as well as in a subpopulation of patients with TSM.
Results
The overall incidence of TSM was 5.9% (54/922), which was observed in 40 patients. Thirty-two patients had one episode of TSM, and eight patients had recurrent TSM. Although TSM in the first examination increased the risk of recurrent TSM in the whole population (OR 24.45; P < 0.001), the incidence of recurrent TSM was low (2.4%, 22/922). On subpopulation analysis, TSM in the first examination did not influence recurrent TSM (OR 0.36; P = 0.250).
Conclusion
Patients undergoing multiple gadoxetate disodium-enhanced MR examinations who experienced recurrent TSM were not affected by TSM in the first examination. Therefore, a single episode of TSM should not be considered a risk factor of recurrent TSM.
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Acknowledgments
The authors thank the MR radiographers of our unit, Mr. Hyun-Geun Lee, Mr. Keun-Taek Oh, and Mr. Eun-Seong Kim, for technical assistance with MR studies. The authors also thank Ha Yan Kim at the Biostatistics Collaboration Unit, Medical Research Center, College of Medicine, Yonsei University for statistical assistance.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. This study does not contain any studies with animals performed by any of the authors. For this type of study formal consent is not required.
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Im, W.H., Song, J.S., Park, E.H. et al. Transient severe motion in the arterial phase during gadoxetate disodium-enhanced MR imaging: evaluation of patients with multiple MR examinations. Abdom Radiol 42, 2393–2401 (2017). https://doi.org/10.1007/s00261-017-1145-0
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DOI: https://doi.org/10.1007/s00261-017-1145-0