| 李金锋,梁燕,郭行高,江波,赵廷强.眼眶磁共振成像技术的研究[J].中华放射医学与防护杂志,2005,25(5):474-476 |
| 眼眶磁共振成像技术的研究 |
| Orbit MR imaging technology |
| 投稿时间：2005-02-17 |
| DOI： |
| 中文关键词: 眼眶 磁共振 成像技术 |
| 英文关键词:Orbit MRI Imaging technology |
| 基金项目: |
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| 中文摘要: |
| 目的 探讨眼眶磁共振扫描成像技术。方法 采用GE 1.5Tsigna Echo speed或GE 1.5Tsigna Twin speed,对30例患者做眼眶磁共振成像(Magnetic Resonance Imaging)。脉冲序列:SET1加权(weighted Imaging WI),FSET2加权(weighted Imaging WI),T2WI采用脂肪抑制技术或SE T1flair,FRFSE T2WI T2WI采用脂肪抑制技术。扫描方位:横轴位(Axial)、冠状位(Coronal)、矢状斜位(Oblique Sagittal)和横轴俯卧位(prone)等。扫描参数:Fov 18cm×18cm,SE T1WI: TR 440ms TE 11ms,FSE T2WI:TR 3000ms TE 98ms或T1flair:TR 2143ms,TE 11ms,TI 750ms,FRFSE T2WI:TR 3500msTE 80ms,矩阵256×256,接收带宽15.63MHz,平均激励次数4次,层厚3～4mm,无间隔。增强对比剂用GdDTPA0.1mmolkg。结果 横轴位可清晰显示视神经全长及眼内外直肌及与病变的关系。冠状位在同一层面可清晰显示视神经、眼内外直肌、眼上下直肌的断面及与病变的关系。矢状斜位可清晰显示视神经全长、眼上下直肌及与病变的关系。结论 磁共振扫描参数的优化组合和选择正确的扫描方位,及T2WI脂肪抑制技术等的应用更有助于显示正常眼眶解剖结构及眼眶病变的定位和诊断。 |
| 英文摘要: |
| Objective To investigate the MR imaging technology of orbit. Methods Magnetic resonance imaging (MRI) in orbit of 30 patients were performed by GE 1.5 T Signa Echo speed or GE 1.5 T Signa Twin speed. Pulse Sequence: SE T1weighted imaging (WI) FSE T2WI, T2WI fat suppression (FS) technology or SET1flair FRFSE T2WI, T2WI FS technology. Patient position: axial coronal and oblique sagittal, supine, prone. Parameters: Fov, 18 cm×18 cm, SE T1WI, TR440ms TE11ms, FSE, T2WI TR3000 ms TE98 ms or T1flair TR2143 ms TE11ms TI750 ms, FRFSE T2WI, TR3500 ms TE80 ms. Matrix 256×256, receiving bandwidth 15.63 MHz. Nex 4 times, slice thickness 3-4 mm. No spacing. 0.1 mol/kg Gd-DTPA was used to contrast. Results The whole optic nerve,medial lateral rectus muscle and lesions were displayed clearly on axial section. The optic nerve, medial lateral rectus muscle and superior inferior rectus muscle were displayed clearly on coronal section of the same plan. The whole optic nerve, superior inferior rectus muscle and lesions were displayed clearly on oblique sagittal section. Conclusion Parameters such as MRI pulse sequense, patient position, fat suppression technology, showld be taken together for good location in taking photos. These are helpful to display anatomic structures the orbit and to take site,qualitative analysis of orbital lesions. |
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