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Abstract #4360

Is there an optimal acquisition delay for postcontrast quantitative MRI of brain metastasis?

Koung Mi Kang1, Seung Hong Choi1, Moonjung Hwang2, Soo Chin Kim3, Ji-Hoon Kim4, Tae Jin Yun4, and Chul-Ho Sohn4

1Seoul National University Hospital, Seoul, Korea, Republic of, 2MR Applications and Workflow, GE Healthcare, Seoul, R.Korea, Seoul, Korea, Republic of, 3SNUH healthcare system gangnam center, Seoul, Korea, Republic of, 4Department of Radiology, Seoul National University Hospital, Seoul, Korea, Republic of

In the brain metastasis, T1 shortening after the administration of gadolinium contrast agent may vary with the timing of contrast administration. Synthetic MRI enables quantitative measurements with relatively short times. Our study aimed to determine the optimal acquisition delay for quantitative imaging of brain metastases with contrast-enhanced synthetic MRI. This study revealed that there was no significant difference and relationship in the histogram parameters between three different delay time points of immediately, 8 minutes and 20 minutes after the contrast injection. Therefore, postcontrast quantitative MRI might be acquired regardless of time within 20 minutes.

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