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Abstract #3320

Reducing TSM by Oxygen Inhalation: effective for pleural effusion but not ascites

Xiaoqian Jia1, Jianxin Guo2, Xiaocheng Wei3, and Jian Yang2
1Ridiology, The First Affiliated Hospital of Xi'an Jiao Tong University, xi'an, China, 2The First Affiliated Hospital of Xi'an Jiao Tong University, xi'an, China, 3MR Research China, GE Healthcare, xi'an, China

In this study, we try to provide a wider cohort of subjects with continuous low flow oxygen inhalation during dynamic contrast-enhancedMR liver imaging to reduce “Transient Severe Motion” (TSM) after administration of gadoxetate disodium. The image quality was quantitatively assessed regarding to motion artifacts for each dynamic phases. The incidences of TSM were also compared between experimental and control groups. In addition, separate comparison of arterial phase motion scores was conducted among, according to the presence of complications, three divided categories: category of combined Pleural Effusion (including concurrent ascites), category of combined Ascites (including concurrent pleural effusion), and category of None.The results show that continuous oxygen inhalation can significantly reduce the occurrence of TSM; the observations can be summarized as: 1) pleural effusion may reduce image quality, and can be alleviated by oxygen inhalation, and 2) oxygen inhalation is less effective under the condition of ascites.

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