摘要
目的探讨低剂量CT扫描技术在副鼻窦病变检查中的临床应用价值。方法用回顾性分析的方法,将200例入选病例分为两组,每组100例,常规组扫描条件是根据四维剂量调节(CARE Dose 4D)技术进行扫描,低剂量组扫描条件是根据预先CARE Dose 4D技术中mAs降至一半,其余参数不变。扫描后行轴位和冠状位重建。记录每次扫描自动显示容积CT剂量指数(CTDIvol)和剂量长度乘积(DLP)的数据,计算有效剂量(ED)。分析两组扫描图像质量的差异性及辐射剂量的高低。结果低剂量组与常规剂量组图像质量差异无显著性,图像噪声略增高,但不影响诊断质量,辐射剂量下降显著。结论副鼻窦低剂量CT扫描能显著降低辐射剂量,而对图像诊断质量没有明显影响。
Objective To investigate the clinical application value of low dose 64 slice CT scanning technology in pa- ranasal sinus lesions. Methods 200 cases were included in the retrospective analysis . Cases were classified as two groups, namely ,conventional group and low dose group （n = 100） ,respectively. Cases in conventional group were scanned according to the four dimensional Dose （CARE dosed 4 D） scanning technology,and those in low Dose group were scanned under the con- dition of half dose mAs of which was used in conventional group with other parameters remaining the same. Coronal and sagit- tal images were reconstructed afterward. Data of volume CT dose index （CTDIvol） and dose length product （DLP） were auto- matically displayed and effective dose （ED） was calculated. Differences of image quality and scanning radiation dose between two groups were analyzed. Results There was no significant difference for image quality between low dose group and con- ventional group with slightly higher image noise in the former,which will not affect the image interpretation and diagnosis. Ra- diation dose was significantly decreased for the former,which has a statistical meaning. Conclusion Radiation dose can be significantly reduced with no obvious decrease for image quality using low dose CT scanning technique in paranasal sinus.
出处
《中南医学科学杂志》
CAS
2014年第6期595-597,共3页
Medical Science Journal of Central South China
关键词
螺旋CT
低剂量
副鼻窦
图像质量
spiral CT
low dose
paranasal sinus
image quality
