| 彭鹏,刘怀军.真实稳态进动快速成像脉冲序列在肝脏病变中的应用[J].中国医学影像技术,2012,28(8):1546~1550 |
| 真实稳态进动快速成像脉冲序列在肝脏病变中的应用 |
| Application of fast imaging employing steady-state acquisition MR imaging in the hepatic lesions |
| 投稿时间：2012-02-13 修订日期：2012-03-22 |
| DOI： |
| 中文关键词: 磁共振成像 肝脏疾病 FIESTA脉冲序列 |
| 英文关键词:Magnetic resonance imaging Liver diseases FIESTA sequences |
| 基金项目: |
|
| 摘要点击次数: 2326 |
| 全文下载次数: 808 |
| 中文摘要: |
| 目的 探讨MR稳态采集快速成像(FIESTA)在肝脏病变中的应用价值。方法 对121例拟诊肝脏疾病患者分别行轴位、冠状位FIESTA T2*W及FSE T2W成像,对其中经病理或临床证实的80例患者(244个病灶)进行评价,包括病灶检出率、图像质量分级及定量分析。结果 ①FIESTA序列对富水性病灶的检出率略高于FSE序列(P>0.05),对实性病灶的检出率明显低于FSE序列(P<0.05);②在病灶对比和伪影方面,FSE序列优于FIESTA序列(P<0.05);FIESTA序列则在腹部脏器边界及间隙解剖显示和肝静脉及门静脉系统显示中有明显优势(P<0.05);③FIESTA序列的SNR高于FSE序列(P<0.001),而肝脾CNR则低于FSE序列(P<0.001);FIESTA序列的实性病灶CNR低于FSE序列(P<0.05),而富水性病灶CNR与FSE序列相近(P>0.05)。结论 FIESTA脉冲序列的优点:①具有很好的图像SNR;②能清楚显示腹部脏器边界及间隙解剖、门静脉肝静脉结构及受侵情况、胆管内外病灶范围;③成像速度快,几乎无运动伪影。缺点:①检出实性病灶的能力差,尤其对于实性小病灶;②易出现磁化率伪影。 |
| 英文摘要: |
| Objective To explore the application value of fast imaging employing steady-state acquisition (FIESTA) MR imaging in the detection of hepatic lesions. Methods FIESTA T2W*I and FSE T2WI were obtained in 121 patients with liver lesions, then 80 patients with 244 pathologically or clinically proved lesions were detected, and FIESTA and FSE were evaluated according to detection ratio, image quality classification and quantitative analysis. Results ①For detecting cystic lesions, FIESTA was little better than FSE (P>0.05), while for solid lesions, FIESTA was evidently lower than FSE (P<0.05). ②For the lesion's contrast and artifacts, FSE was better than FIESTA (P<0.05), however, FIESTA had an advantage in the abdomen viscera border, interval anatomy shown, definition of intrahepatic veins and portal vein system (P<0.05). ③SNR of FIESTA sequences was higher than FSE sequences (P<0.001). Liver and spleen contrast-noise ratio of FIESTA were lower than FSE (P<0.001). The contrast-noise ratio of solid lesions in FIESTA was lower than those in FSE (P<0.05), but no differences existed for the contrast-noise ratio of cystic lesions (P>0.05). Conclusion FIESTA has good SNR, little motion artifact, and excellent demonstration of abdominal framework, interval anatomy, intra-hepatic veins, portal vein system and the lesions in or out of biliary duct, while it detects fewer solid lesions than FSE, especially for solid small lesions, and appears magnetism artifacts easily. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
