| 丁荏芬,郑晓林,何惜金,郭友,陈曌,杨沛钦.动态增强三维血管成像MR技术在腹部肿瘤诊断中的作用[J].中国医学影像技术,2005,21(4):611~614 |
| 动态增强三维血管成像MR技术在腹部肿瘤诊断中的作用 |
| Three-dimensional dynamic contrast-enhanced MR angiographyin diagnosis of abdominal tumors |
| 投稿时间：2004-12-10 修订日期：2005-01-24 |
| DOI： |
| 中文关键词: 磁共振血管成像 三维成像 腹部肿瘤 诊断显像 |
| 英文关键词:Magnetic resonance angiography Three-dimensional imaging Abdominal neoplasms Diagnostic imaging |
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| 中文摘要: |
| 目的 探讨动态增强三维血管成像技术(3D CE-MRA)在诊断腹部肿瘤中的价值。方法 26例腹部良恶性肿瘤患者行常规MRI与3D CE-MRA,对3D CE-MRA病灶检出率、对比噪声比(CNR)进行比较,统计其肿瘤的动静脉显示率,并观察肿瘤不同增强时相的表现。结果 共41个病灶,在实质脏器37个病灶中,T2WI检出29个,B超检出30个,3D CE-MRA动脉期检出34个,其病灶检出率高于T2WI和B超。肝内肿瘤CNR,T2WI为21±3.8,3D CE-MRA动脉期为13±4.6(P＜0.05),静脉期为19±3.3(P＞0.05),延迟期为23±2.5(P＜0.05)。肝外肿瘤CNR, T2WI为15±5.8,3D CE-MRA动脉期为18±4.3(P＜0.05),静脉期为20±6.1(P＜0.05),延迟期CNR为21±4.8(P＜0.05),3D CE-MRA CNR等于或高于T2WI,其肿瘤动脉显示率为80.4%,静脉显示率为26.8%,能显示肿瘤不同时相的强化特点。结论 3D CE-MRA对腹部肿瘤检出率高,能显示肿瘤血管与组织强化特点,为诊断腹部肿瘤有价值的方法。 |
| 英文摘要: |
| Objective To investigate the value of three-dimensional dynamic contrast-enhanced MR angiography (3D CE-MRA) in diagnosis of abdominal tumors. Methods Conventional MRI and 3D CE-MRA were performed in 26 patients with abdominal tumors. Detection rates of lesions and contrast-to-noise ratios (CNR) in 3D CE-MRA were compared with those in T2WI. Tumorous arteries and veins were counted and the enhanced patterns of lesions on multi-phases images were analyzed. Results There were total 41 lesions in all patients. In 37 tumors of parenchyma viscera, 29, 30 and 34 were detected by T2WI, ultrasound and arterial phase of 3D CE-MRA respectively, and 3D CE-MRA showed the highest detection rate of lesions. For liver tumors, CNR was 21±3.8, 13±4.6 (P＜0.05), 19±3.3 (P＞0.05) and 23±2.5 (P＜0.05) in T2WI, arterial, venous and delayed phases respectively. For other tumors, CNR were 15±5.8,18±4.3 (P＜0.05) and 21±4.8 (P＜0.05) in T2WI, arterial, venous and delayed phases respectively. The CNR of 3D CE-MRA was higher than or similar to that of T2WI. 80.4% of tumorous arteries and 26.8% of tumorous veins were demonstrated in 3D CE-MRA. The enhanced characterization of tumors was satisfactorily showed in 3D CE-MRA. Conclusion With high sensitivity to detect abdominal tumors and excellent ability to demonstrate tumorous vessels and enhanced patterns of tumor, 3D CE-MRA is a valuable method for diagnosing abdominal tumor. |
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