磁共振3D-VIBE序列和STAR-VIBE序列对肺结节显示能力的比较研究

Comparative study of magnetic resonance imaging with 3D-VIBE sequence and STAR-VIBE sequence on pulmonary nodule

目的探讨磁共振快速三维容积式插入法屏气检查(three-dimensional volumetric interpolatedbreath-holdexamination,3D-VIBE)序列和STAR-VIBE(starvolumetric interpolatedbreath-holdexamination)序列对肺结节显示能力的差异。材料与方法收集本院临床怀疑肺占位且行胸部CT及胸部MRI检查患者42例,采用3.0 T磁共振进行3D-VIBE序列和STAR-VIBE序列扫描。由两名具有5年以上工作经验的影像科医师以CT图像作为参考标准对磁共振图像进行独立分析,计算不同磁共振序列肺结节检出率,并采用四分量表法评价不同磁共振序列显示肺结节的形态特征。结果 42例患者CT共检出肺结节258个,STAR-VIBE序列共检出结节243个(检出率约94.2%),3D-VIBE序列共检出结节166个(检出率约64.3%)。STAR-VIBE序列对肺结节检出率显著高于3D-VIBE序列(P<0.05),其中STAR-VIBE序列在直径≥6 mm结节的检出率达100%。STARVIBE序列显示肺结节形态特征的主观评分均优于3D-VIBE序列(P均<0.05)。结论与3D-VIBE序列比较,STAR-VIBE序列不仅可以提高肺结节检出率,还可以提供更多的肺结节形态特征信息。

Objective:To explore the application of magnetic resonance imaging with threedimensional volumetric interpolated breath-hold examination(3D-VIBE)sequence and STAR-VIBE sequence in displaying pulmonary nodules.Materials and Methods:Forty-two patients who were suspected with lung lesions and underwent chest CT and chest MRI were collected.Magnetic resonance imaging with 3D-VIBE sequence and STAR-VIBE sequence were performed using a 3.0 T magnetic resonance scanner.Magnetic resonance images were independently analyzed by two radiologists who owned more than five years working experience with CT images as a reference standard.The detection rates of pulmonary nodules in different MRI sequences were calculated,and the morphological features of pulmonary nodules were evaluated on magnetic resonance imaging using the 4-point scoring criteria.Results:Two hundred and fifty-eight pulmonary nodules were detected on CT images in 42 patients,243 pulmonary nodules were detected on STAR-VIBE sequence(detection rate 94.2%),while 166 pulmonary nodules were detected on 3D-VIBE sequence(detection rate 64.3%).The detection rate of STAR-VIBE sequence was significantly higher than that of 3D-VIBE sequence,and detection rate increased to 100%for those pulmonary nodules with diameter≥6 mm on STARVIBE sequence.The subjective scores of STAR-VIBE sequence were significantly superior to 3D-VIBE sequence in displaying morphological features of pulmonary nodules(all P<0.05).Conclusions:Compared with 3D-VIBE sequence,STAR-VIBE sequence not only improves the detection rate of pulmonary nodules,but also provides more information on the morphological features of pulmonary nodules.