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KMID : 0858520110150020102
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Journal of the Korean Society of Magnetic Resonance in Medicine
2011 Volume.15 No. 2 p.102 ~ p.109
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Pre-operative Evaluation of Consistency in Intra-axial Brain Tumor with Diffusion-weighted Images (DWI) and Conventional MR Images
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Oh Moon-Sik
Ahn Kook-Jin
Choi Hyun-Seok
Jung So-Lyung
Lee Yoon-Joo
Kim Bum-Soo
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Abstract
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Purpose: To retrospectively evaluate the usefulness of diffusion-weighted images, ADC maps and conventional MR images for determination of brain tumor consistency.
Materials and Methods: Twenty-three patients with brain tumor underwent MR examinations with T1, T2 and diffusion-weighted images. Regions of interest (ROIs) were drawn in the tumors, and the measured signal intensities (SI) were normalized with the contralateral side. We evaluated the correlation between SI ratios from various images and tumor consistency assessed at surgery. In three patients with both cystic and solid components, each component was evaluated independently. Qualitatively observed SIs were also correlated with tumor consistency.
Results: Statistical analysis revealed significant correlation between tumor consistency and ADC ratio (r = -0.586, p = 0.002), SI ratios on T2-weighted images (r = -0.497, p = 0.010), and observed SIs on T2-weighted images (r = -0.461, p = 0.018). The relative ratio of ADC value correlated with tumor consistency most strongly.
Conclusion: The measured ratio of ADC, SI ratio and observed SI grade on T2-weighted images can provide valuable information about the consistency of brain tumor.
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KEYWORD
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Consistency, Brain tumor, Diffusion weighted image
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