【摘要】 目的评价MRI在后颅窝肿瘤病变的诊断优势及应用价值。方法收集后颅窝肿瘤病变53例,45例经手术证实,8例经临床随访证实。根据病变的特点,采用不同轴位和不同序列扫描。分析其MRI影像资料。结果53例后颅窝肿瘤病变中桥小脑角区15例;脑干9例;小脑21例;四脑室8例。MRI在后颅窝肿瘤病变的检出率、定位率可达100%,其诊断符合率达93.3%。结论MRI在后颅窝检查中无骨性伪影干扰,结合多轴位和多序列扫描,对后颅窝病变的检出率和定位率大大提高,有明显的诊断优势及临床应用价值。更多还原

【Abstract】 Objective To study the advantage and value of MRI in the diagnosis of tumors located in posterior cranial fossa. Methods In total 53 cases with tumors located in posterior cranial fossa were enrolled, 45 cases were proven by operation and pathology, 8 cases were proven by clinical follow up. Different sections and sequence, based on the characteristic of lesions, were applied in the examination. The MRI findings were analyzed. Results Among the 53 cases with tumors located in posterior cranial fossa, the location of the lesions included 15 cases in cerebellopontine angle cisterns, 9 cases in brain stem, 21 cases in cerebellum, and 8 cases within the 4th ventricle. The sensitivity and accurate location rate of MRI was 100%. And the general diagnostic accuracy was 93.3%. Conclusion MRI imaging of the tumors located in posterior cranial fossa avoids the artifacts of skull. Integrated multiple sections and sequences provides fairly high rate of the sensitivity and accurate location. There are distinct advantage and value of MRI in the diagnosis of tumors located in posterior cranial fossa.更多还原