| 侯仲军,张鑫,于晓君,陈耀棠,欧阳小明.磁共振心电门控HASTE和呼吸门控TSE的肺部应用[J].中国医学影像技术,2006,22(3):413~416 |
| 磁共振心电门控HASTE和呼吸门控TSE的肺部应用 |
| Application of ECG triggered HASTE and respiratory gated TSE technique in lung |
| 投稿时间：2005-10-24 修订日期：2006-12-08 |
| DOI： |
| 中文关键词: 磁共振成像 心电门控HASTE 呼吸门控TSE 肺 |
| 英文关键词:Magnetic resonance imaging ECG triggered HASTE Respiratory gated TSE Lung |
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| 中文摘要: |
| 目的 评价磁共振心电门控HASTE和呼吸门控TSE在肺部的应用。方法 经CT检查的正常志愿者组10例,病变组47例,分别行磁共振屏气心电门控HASTE和呼吸门控TSE扫描,分析其图像的特征、质量。正常组计算正常肺实质的信噪比,病变组计算病变的信噪比,正常肺实质与病变的对比度。结果 心电门控HASTE肺实质信号较均匀,无心脏和大血管搏动伪影;呼吸门控TSE肺纹理丰富、清晰。正常肺实质的信噪比分别为4.41±0.82; 2.43±0.40 (t=12.17, P<0.01)。病变的信噪比分别为:6.58±3.31, 4.51±1.86 (t=0.05, P<0.01)。病变与正常肺的对比度分别为0.81±0.06; 0.86±0.05 (t=4.79, P<0.01)。CT和磁共振检查共发现病变91个,最小病变为3 mm×3 mm×4 mm。其敏感性分别为:CT 93%,心电门控HASTE 99%,呼吸门控TSE 91%。结论 对于5 mm以下的肺结节的检出,磁共振心电门控HASTE存在较大的潜力。 |
| 英文摘要: |
| Objective To evaluate the utility of ECG triggered HASTE and respiratory gated TSE in lung. Methods Ten normal volunteers and 47 patients were recruited in the study, which were examined by CT first. Then, breath-hold was necessary in ECG triggered HASTE, but not in respiratory gated TSE. The image characteristic and quality were analyzed, the signal to noise ratio (SNR) of lung parenchyma in control group and that of lesions in patient group were calculated, and the contrast between the lesions and normal lung parenchyma were also calculated. Results The signal of lung parenchyma was more homogenous and pulsatile artifacts free on ECG triggered HASTE sequence. The lung markings were clear and abundant on respiratory gated TSE sequence. The SNRs were 4.41±0.82 and 2.43±0.40 (t=12.17, P<0.01) in the lung parenchyma individually in the control group. Meanwhile, the SNRs were 6.58±3.31, 4.51±1.86 (t=0.05, P<0.01) of the lesions in the patient group. The contrast were 0.81±0.06, 0.86±0.05 (t=4.79, P<0.01) between the lesion and normal lung parenchyma. 91 lesions were found totally by both CT and MRI, and the smallest lesion was 3 mm×3 mm×4 mm. The sensitivity was 93% of CT, 99% of ECG triggered HASTE and 91% of respiratory gated TSE, respectively. Conclusion ECG triggered HASTE has great potential to detect lesion less than 5 mm. |
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