目的探讨CT扫描中辐射剂量控制的有效方法,保护患者,减少危害,同时保证图像质量。方法通过分析CT辐射剂量增加的原因,针对辐射方式、特点,对辐射剂量控制与图像质量保证,采取相应的扫描方案。结果有效降低CT扫描辐射剂量,图像质量能满足临床诊断需要。结论降低管电流、管电压、增大螺距、缩短时间、控制长度等优化措施,是CT辐射剂量控制的有效手段。 Objective To explore effective methods of radiation dose control in CT scanning to protect patients and reduce the harm while ensuring the image quality. Methods By analyzing the reason of increasing dose of CT radiation, aiming at the radiation pattern, characteristics, radiation dose control and image quality assurance, a corresponding scanning scheme was adopted. The results effectively reduce the CT scan radiation dose, image quality to meet the needs of clinical diagnosis. CONCLUSION Optimum measures to reduce the tube current, tube voltage, increase the pitch, shorten the time and control length are effective measures for CT dose control.