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人脑及脑肿瘤~1H磁共振波谱研究
~1H NMR Spectroscopic Study of Human Brain and Brain Tumors
【作者】 方虹;
【导师】 郭庆林;
【作者基本信息】 第四军医大学 , 影像学, 1995, 博士
【摘要】 在近15年里,磁共振技术的临床应用迅猛发展,已成为影像学(特别是神经放射学)重要的检查方法。磁共振成像(MRI)可用以人体解剖结构的观察。磁共振技术的另一个分支——磁共振波谱(MRS)技术提供了一种无损伤性检测人体生理和生化代谢的新方法。 脑肿瘤是临床常见病,年发生率为10/10万,每年死于肿瘤的患者2.5%是脑肿瘤。由于颅内肿瘤的解剖特点,不能象其他部位的肿瘤一样容易进行探查手术。因此术前及时而准确的定位和定性诊断尤为重要。~1H—NMR波谱技术提供了一种无创研究脑和脑疾患时生化代谢改变的新方法。国外已有学者应用该技术对脑肿瘤进行了部分研究,但结果存在着差异,国内在该领域仍是空白。 本研究的目的 1.应用~1H磁共振波谱研究正常人脑内某些化合物的含量及脑内分布情况。 2.观察影响波谱测量的技术因素。 3.观察脑肿瘤的~1H磁共振波谱改变,分析其生化特点及~1H波谱在脑肿瘤诊断中的意义。 4.探讨波谱改变与肿瘤DNA含量及肿瘤增殖活性的关系。 材料和研究方法 1.应用1.5特斯拉MRI仪对18例正常人脑进行~1H波谱测试。测量区包括灰质、白质、小脑和丘脑,所用序列为STEAM。 2.选择不同扫描参数对5例正常人及含乙酸和乳酸的标准水模进行测试。
【Abstract】 In the last 15 years, NMR has become more popular clinical practice, and was accepted as a new and promising modality in ima-geology, especialy in neuroradiology. Besides the visualization of the internal anotomy of the body, this technique also afford a non-invasive facilitie looking into the physiological and biochemical changes of living human body, that is magnetic resonance spectroscopy (MRS).Brain tumor are not rare, The annual incidence of brain tumor is about 10 per 100,000 population, and approximately 2.5% of all cancer deaths are caused by brain tumor. For it’s location in particular, it is very important to make accurate diagnosis including an-otomic location and pathologic determination before hand instead of exploratory operation. Localizated proton MR spectroscopy has provided a non-invasive method to investigate either normal or pathologic brain metabolism. Some reports about the brain tumor are mainly
【Key words】 Magnetic Resonance; Spectroscopy; Brain; Brain tumor; Glioma; Meningioma; ~1H; 31P; Metabolism; NAA; Lactate; DNA;