64排螺旋CT低剂量扫描在儿童腺样体检查中的应用研究

目的 探讨儿童腺样体低剂量CT扫描的表现并对其图像质量进行初步分析，以减少儿童X射线检查的辐射剂量，协助临床诊断。方法 分析100例临床怀疑腺样体肥大儿童。分2组，50例使用低剂量：60~80 kV，50例使用常规剂量：80~120 kV。所有患者均分析不同CT剂量的图像对其腺样体的显示情况。结果 检查患者中CT表现为腺样体肥大的占94例，占94%，常规剂量患者得到信噪比较高图像，但所接受射线量较大。低剂量扫描大大地减少了儿童的辐射剂量，图像均能达到临床诊断要求。结论 低剂量CT检查能准确显示儿童腺样体的肥大程度并对其作出诊断，为临床提供足够的影像学依据。

Application of low-dose 64 slice spiral CT scanning technology in adenoidal hypertrophy in children

Objective To analyze and investigate the application, manifestation and image quality of low-dose 64-slice spiral CT scanning technology on the adenoidal hypertrophy of children, so as to decrease the unnecessary radiation of X-ray and improve the clinic diagnosis.Methods 100 cases of children with suspected adenoidal hypertrophy were divided into two groups randomly, and respectively underwent low-dose (60~80 kV) and conventional-dose (80~120 kV) 64-slice spiral CT scanning. All patients' image quality and diagnostic results of different radiation doses were compared and analyzed.Results 94 children out of 100 were diagnosed with adenoidal hypertrophy, accounting for 94%. The conventional-dose group showed relatively high signal-to-noise ratio, while exposed to more radiation; the low-dose group also got qualified images enough for the clinical diagnosis requirement, but obviously cut down the radiation quantity. There was no significant difference in the diagnosis of adenoidal hypertrophy between the low-dose group and conventional-dose group.Conclusion The low-dose 64 slice spiral CT scanning is able to get accurate evidences for the diagnosis of adenoidal hypertrophy of children, which can provide adequate imaging support for clinical diagnosis.