傅里叶变换中红外光谱法检测脑膜瘤的研究

Study on the Meningoima Using FT-Mid-IR Spectroscopy

采用傅里叶变换衰减全反射中红外光谱法检测了24例液氮冻存的脑膜瘤离体样品(其中良性肿瘤12例,有恶性倾向的肿瘤12例),对得到的红外光谱进行整理分析,发现不同类型脑膜瘤组织(如纤维型脑膜瘤和内皮型脑膜瘤)的红外光谱存在着差异,并且同一种类型的脑膜瘤组织,其恶性倾向的程度不同,他们的红外光谱也表现出较为明显的区别,因此,我们可以从各个特征吸收峰的峰位、峰形及峰强等信息的变化来区分脑膜瘤,并可以初步鉴别脑膜瘤的性质;研究结果发现,通过某些特征吸收峰(如1 160cm-1)峰位的变化来鉴别脑膜瘤的性质与病理诊断结果的符合率大于85%,说明傅里叶变换衰减全反射中红外光谱法有可能发展成为一种对样品无损伤、快速的脑肿瘤诊断新方法。

In the present investigation,24 cases of meningoima tissues（including 12 cases of benign tumor and 12 cases of malignant tumor 12） were detected using FT-mid-IR spectroscopy linked with attenuated total reflectance（ATR） accessory.These FTIR spectra obtained from the above-mentioned meningoima tissues were analyzed and compared.Significant differences were found in the spectral features of different kinds of meningoima tissues for example fibrous type meningoima and endothelioid meningoima;and for the same type of meningoima tissues the significant differences in the spectram features can be also observed with the increase of grade malignancy.The malignant tumor can be distinguished primarily from benign tumor by the changes of position,shape and intensity of infrared absorption bands,particularly in the ranges of 1 000~1 500 cm-1.The results show that the peak position of the bands（such as 1 160 cm-1） can be used to distinguish the characteristic of meningoima which are in agreement with the pathological results.The accuracy is larger than 85%.These results demonstrate that FT-mid-IR spectroscopy exhibits prospect to develop a novel,non-invasive and rapid method for the diagnosis the brain tumors.