多层螺旋CT体部γ刀定位扫描技术的研究

目的 研究应用多层螺旋CT(MSCT)进行体部γ刀定位的CT扫描技术。材料与方法 应用美国GE公司生产的Light speed plus多层螺旋CT(4层)对306例胸部占位患者、141例腹部占位患者行γ刀定位增强扫描,对比剂的用量为1.2ml/kg,注射流率为2.5mL/s~2.8mL/s,通过CT扫描所得图像制定治疗计划。 结果 CT增强扫描图像可以清晰显示病灶的大小、形态,标志点清楚,靶点确定均一次到位,组织对比度和空间分辨率较高。 结论 应用多层螺旋CT进行体部γ刀定位,采用合适的扫描方案及造影技术能获得较为满意的定位扫描图像,是一种安全有效的定位方法。

Study on Scanning Techniques for Body Gama Knife Localization with Multi-slice Helical CT

Purpose: Study on scanning techniques for body Gama knife localization with multi-slice helical CT. Material and Method: 306 cases with chest space occupying and 141 cases with abdomen space occupying had been enhanced scanned for preoperative localization by multi-slice helical CT. The injection volumn of contrast agent is 1.2mL/kg with the rate of 2.5 mL/s~2.8mL/s. The images will be the basis for making treatment planning. Result: CT enhanced scanning images indicated the size, shape and location of focus accurately, and provided high histologic contrast and space resolution is high. Conclusion: The satisfactory images can be obtained with the appropriate scanning parameters and scanning techniques. Multi-slice helical CT examination is safe and effective method for Gama knife treatment localization.