Quantitative MR evaluation of intracranial epidermoid tumors by fast fluid-attenuated inversion recovery imaging and echo-planar diffusion-weighted imaging.

摘要: BACKGROUND AND PURPOSE: Quantification of MR can provide objective, accurate criteria for evaluation a given sequence. We quantitatively compared conventional sequences with fast fluid-attenuated inversion recovery (fast-FLAIR) and echo-planar diffusion-weighted (DW) imaging in the examination intracranial epidermoid tumors. METHODS: Eight patients surgically confirmed tumors were examined T1-weighted sequences, T2- proton density–weighted dual-echo fast-FLAIR DW sequences. measured signal intensity apparent diffusion coefficient (ADC) tumors, normal brain tissue, CSF calculated tumor-to-brain tumor-to-CSF contrast ratios contrast-to-noise (CNR). Results among five methods. RESULTS: On imaging, mean was significantly higher than that but lower brain; ratio CNR 4.71 9.17, respectively, greater values imaging. showed remarkably hyperintense relative to those CSF; 13.25 19.34, on or The ADC 1.197 × 10 −3 mm 2 /s, tissues. CONCLUSION: Fast-FLAIR is superior depicting Echo-planar provides best lesion conspicuity hyperintensity not caused by restriction T2 shine-through effect.