3.0 T MRI常规脉冲序列在肺癌中的应用

Value of 3.0 T MRI with conventional pulse sequences in lung cancer

目的探讨3.0 T磁共振常规脉冲序列T1WI、T2WI、弥散加权成像(diffusion weighted imaging,DWI)在肺癌检查中的成像质量及临床应用价值。材料与方法 43例肺癌患者分别行磁共振TSE-BLADE-T2WI、HASTE-T2WI、VIBE-DIXON-T1WI及EPI-DWI成像。分析不同扫描序列图像的运动伪影、支气管、肺癌病灶与继发阻塞性病变的显示情况。结果 HASTE图像运动伪影最少,运动伪影出现率为2%(1/43);支气管显示以TSE-BLADE序列最好;TSE-BLADE-T2、HASTE-T2和EPI-DWI区分肿块和继发性肺不张的鉴别率分别为72.7%、81.8%、81.8%,这3组两两之间比较差异无统计学意义(表概率分别为0.3446、0.3446、0.4135,P=1.0000),VIBE-T1序列未能区分。结论 3.0 T磁共振常规脉冲序列T1WI、T2WI、DWI图像各有优缺点,互为补充,在胸部影像检查中可以发挥其独有的优势。

Objective： To evaluate the image quality and clinical application of the routine magnetic resonance（MR） pulse sequences in lung cancer. Materials and Methods： Forty-three cases of lung cancer had done MR examinations at 3.0 T MR. Scan sequences were as followed, T2WI/TSE-BLADE, T2WI/HASTE, T1WI/VIBEDIXON, DWI/EPI. Analysed the motion artifact, bronchia, difference of lung lesions and secondary atelectasis of the different scanning sequence images. Results： The motion artifacts from respiration and pulsation on the HASTE images were better controlled than other three sequences, The motion artifacts appeared at a rate of 2%（1/43）. Bronchia showed best in the TSE-BLADE sequence; TSE-BLADE-T2, HASTE-T2 and EPI-DWI could distinguish neoplastci foci and secondary atelectasis, identification rate was 72.7%, 81.8%, 81.8%, respectively, but there was no statistically significant difference between each other（table probability was 0.3446, 0.3446, 0.3446, P=1.0000）. VIBE-T1 sequence failed to distinguish them. Conclusion： 3.0 T MR conventional pulse sequence image respectively have advantages and disadvantages, which can complement each other, can play its unique advantages in the chest imaging.