Classification and definition of intracranial metastasis associating with cerebral cortex: double-dose Gadobutrol and delayed contrast-enhancement 3D MPRAGE

LI Hong-yi; DUAN Yang; CHANG Can-can; LI Yan-feng; YANG Ben-qiang; LIU Wen-yuan; LIU Yu; XU Meng

Journal of China Clinic Medical Imaging ›› 2015, Vol. 26 ›› Issue (9) : 616-619.

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Classification and definition of intracranial metastasis associating with cerebral cortex: double-dose Gadobutrol and delayed contrast-enhancement 3D MPRAGE

LI Hong-yi1, DUAN Yang2, CHANG Can-can1, LI Yan-feng1, YANG Ben-qiang2, LIU Wen-yuan2, LIU Yu2, XU Meng1

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Abstract

Objective: To investigate the classification and definition of intracranial metastasis associating with cerebral cortex by double-dose Gadobutrol and delayed contrast-enhancement of MR scanning using 3D MPRAGE sequences. Methods: Twenty-five patients with suspected intracranial metastases were retrospectively analyzed. All patients underwent MRI examination, which included T1WI, T2WI, FLAIR and delayed contrast-enhancement of MR scanning using 3D MPRAGE sequences.The intracranial metastases were classified and defined according to the images of 3D-MPRAGE. The metastasis, located in the cerebral cortex, at the edge of the cerebral cortex and at the corticomedullary junction, was taken as TypeⅠ, TypeⅡ, Type Ⅲ, respectively. Results: 121 metastatic lesions(6 in typeⅠ, 10 in type Ⅱ, 105 in type Ⅲ) associating with cerebral cortex were found using 3D MPRAGE sequences. Type Ⅲ account for 95.7% of 121 metastatic lesions. There was a positive correlation between the tumor size and tumor typing(rs=0.441, P<0.05). Conclusion: Delayed and double-dose Gadobutrol contrast-enhancement of MR scanning using 3D MPRAGE sequences can clearly display the relationship between intracranial metastasis and cerebral cortex. The intracranial metastasis associating with cerebral cortex were divided into three types and most intracranial metastasis are seen at the corticomedullary junction.

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Brain neoplasms / Neoplasm metastasis / Magnetic resonance imaging

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LI Hong-yi;DUAN Yang;CHANG Can-can;LI Yan-feng;YANG Ben-qiang;LIU Wen-yuan;LIU Yu;XU Meng. Classification and definition of intracranial metastasis associating with cerebral cortex: double-dose Gadobutrol and delayed contrast-enhancement 3D MPRAGE[J]. Journal of China Clinic Medical Imaging. 2015, 26(9): 616-619