Evaluation and Clinical Value of Contrast-Enhanced Fluid-Attenuated Inversion-Recovery MR Imaging in Diagnosis of Leptomeningeal Metastasis / 实用放射学杂志

ABSTRACT

Objective To explore the value of contrast-enhanced FLAIR imaging in diagnosis of leptomeningeal metastasis.Methods 23 cases of leptomeningeal metastasis with definite primitive-tumour were collected.All the cases were confirmed by clinic and laborotary examination.Of the 23 cases,7 cases underwent contrast-enhanced T1WI only,16 case underwent contrast-enhanced T1WI and FLAIR.Two groups were analyzed comparatively in diagnostic accuracy and displaying lesions between images of two sequence.Results(1)2 cases were missed,and 1 case was unsure diagnosed in T1WI contrast group;16 cases were all diagnosed accurately in both T1WI and FLAIR contrast-enhanced group.(2)11 cases with fine linear enhancement and 7 cases with small nodular enhancement were more obviously on contrast-enhanced FLAIR than that on contrast T1WI,but the thick linear enhancement were equal on two sequence.4 cases with more lesions were displayed on contrast-enhanced FLAIR images.The signal intensity on contrast FLAIR images were higher than that on contrast T1WI images at the same lesions.Conclusion Contrast-enhanced FLAIR has important value in diagnosing leptomeningeal metastasis.