Reduction in respiratory motion artefacts on gadoxetate-enhanced MRI after training technicians to apply a simple and more patient-adapted breathing command.

Autor: Gutzeit, Andreas, Matoori, Simon, Froehlich, Johannes, Weymarn, Constantin, Reischauer, Carolin, Kolokythas, Orpheus, Goyen, Matthias, Hergan, Klaus, Meissnitzer, Matthias, Forstner, Rosemarie, Soyka, Jan, Doert, Aleksis, Koh, Dow-Mu, Froehlich, Johannes M, von Weymarn, Constantin, Soyka, Jan D
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Zdroj: European Radiology; Aug2016, Vol. 26 Issue 8, p2714-2722, 9p
Abstrakt: Objective: To investigate whether a trained group of technicians using a modified breathing command during gadoxetate-enhanced liver MRI reduces respiratory motion artefacts compared to non-trained technicians using a traditional breathing command.Materials and Methods: The gadoxetate-enhanced liver MR images of 30 patients acquired using the traditional breathing command and the subsequent 30 patients after training the technicians to use a modified breathing command were analyzed. A subgroup of patients (n = 8) underwent scans both by trained and untrained technicians. Images obtained using the traditional and modified breathing command were compared for the presence of breathing artefacts [respiratory artefact-based image quality scores from 1 (best) to 5 (non-diagnostic)].Results: There was a highly significant improvement in the arterial phase image quality scores in patients using the modified breathing command compared to the traditional one (P < 0.001). The percentage of patients with severe and extensive breathing artefacts in the arterial phase decreased from 33.3 % to 6.7 % after introducing the modified breathing command (P = 0.021). In the subgroup that underwent MRI using both breathing commands, arterial phase image quality improved significantly (P = 0.008) using the modified breathing command.Conclusion: Training technicians to use a modified breathing command significantly improved arterial phase image quality of gadoxetate-enhanced liver MRI.Key Points: • A modified breathing command reduced respiratory artefacts on arterial-phase gadoxetate-enhanced MRI (P < 0.001). • The modified command decreased severe and extensive arterial-phase breathing artefacts (P = 0.021). • Training technicians to use a modified breathing command improved arterial-phase images. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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