探讨3.0T磁共振UTE序列对肺结节的显示能力:与CT图像对比

To explore the ability of 3.0T MR UTE sequence to display pulmonary nodules:comparison with CT images

目的:通过3.0T MR的超短回波时间(UTE)成像与常规剂量CT平扫进行对比,探讨UTE-MRI对肺结节显示的能力,分析其在肺结节的临床应用价值。方法:搜集本院31例患者,行CT平扫及3.0T磁共振UTE序列扫描。以CT检出结节数量及影像特征作为金标准。2名10年以上工作经验放射诊断医师独立记录CT及UTE肺结节数目及形态特征。结果:31例患者CT共检出41枚结节,UTE序列检出40枚结节(检出率97.6%)。UTE检出分叶征28枚,几乎接近金标准CT图像(29枚),检出率为96.5%,两者间差异无统计学意义。UTE检出病灶中心不均质性(19枚),检出率高于CT(10枚),差异具有统计学意义。UTE显示毛刺征数量(15枚),低于CT显示(20枚),但两者间差异无统计学意义。UTE显示胸膜牵拉数量(11枚),高于CT显示(9枚),差异亦无统计学意义。结论:UTE序列对于肺小结节(≥4 mm)检出有高的敏感性,可媲美CT成像,且可提供接近于CT的影像学特征,具有广阔的临床应用前景。

Objective:To compare the ultrashort TE(UTE)sequence of 3.0T MR with conventional dose CT scan,explore the ability of UTE-MRI in displaying pulmonary nodules,and analyze its clinical application value in pulmonary nodules.Methods:The data of thirty-one patients with CT scan and 3.0T MR UTE sequence in our hospital were collected.The number of nodules and the image characteristics detected by CT were taken as the gold standard.Two radiologists with more than ten years of working experience independently recorded the number and morphological characteristics of pulmonary nodules on CT and UTE images.Results:Forty-one nodules were detected by CT in 31 patients,and 40 nodules were detected by UTE sequence(detection rate was 97.6%).Twenty-eight nodules with lobulated signs were detected by UTE,which was almost close to the CT images(29 lesions)with a 96.5%detection rate,and there was no significant difference.The detection rate of heterogeneity in UTE(19 lesions)was higher than that in CT(10 lesions),and the difference was statistically significant.But there was no significant difference in the number of burr signs between UTE(15)and CT(20).And the number of pleural traction showed by UTE(11)was similar to CT(9).Conclusion:MR UTE sequence has a high sensitivity for the detection of small pulmonary nodules(≥4mm),comparable to CT imaging,and can provide imaging features close to CT,which has broad clinical application prospects.