International Journal of Clinical Research. 2021; 5: (1) ; 10.12208/j.ijcr.20210011.
目的 探究低剂量CT扫描在颅脑术后复查中的应用分析。方法 选择颅脑术后复查患者共108例，时间为2019年12月至2020年12月，甲组（管电压120kv，管电流300mA)、乙组（管电压120kv，管电流200mA)、丙组（管电压120kv，管电流160mA)，各36例，对比患者的CT辐射剂量、扫描图像质量评估情况。结果 随着管电流降低，基于管电压不变的情况下，CTDI和DLP呈现出下降的趋势。乙组、丙组的组CTDI、DLP，较甲组均明显降低，存在统计学意义（P＜0.05）；经对甲组和乙组的扫扫描，发现大多图像质量评分处于4分，在扫描丙组时，2分是大部分的图像评分，质量呈现出显著降低的趋势，经秩和检验三组的差距，存在统计学意义（P＜0.05）；在进行头颅CT平扫时，分别选择300 mA、200mA和160 mA完成，之后对图像完成盲法评分。结论 针对产后出血患者，采用200 mA头颅低剂量CT扫描，可显著降低辐射剂量，安全性较高，具有临床应用价值。
Objective To explore the application and analysis of low-dose CT scan in reexamination after craniocerebral surgery. Method: choose the post-cranial surgery A total of 108 patients were examined, from December 2019 to December 2020. Group A (tube voltage 120kv, tube current 300mA), Group B (tube voltage 120kv, tube current 200mA), group C (tube voltage 120kv, tube current 160mA), 36 cases in each group, compare the CT radiation dose of patients and the evaluation of scan image quality. Result: As the tube current decreases, CTDI and DLP show a downward trend based on the constant tube voltage. The CTDI and DLP of group B and group C were significantly lower than those of group A, which was statistically significant (P<0.05). After scanning group A and group B, it was found that most of the image quality scores were at 4 points. In group C, 2 points are most of the image scores, and the quality shows a significant decrease in quality. The difference between the three groups after the rank sum test is statistically significant (P<0.05); when performing a head CT scan, select them separately 300 mA, 200 mA and 160 mA are completed, and then the image is blindly scored. Conclusion : For patients with postpartum hemorrhage, the use of 200 mA low-dose head CT scan can significantly reduce the radiation dose, with high safety and clinical application value.