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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