| 张鹏，张新保.64层螺旋CT低剂量扫描在副鼻窦病变中的应用.[J].中南医学科学杂志.,2014,42(6):595-597. |
| 64层螺旋CT低剂量扫描在副鼻窦病变中的应用 |
| Application of Low dose 64-Slice Detector CT in Paranasal Sinus Lesion |
| 投稿时间：2014-02-10 |
| DOI： |
| 中文关键词: 螺旋CT 低剂量 副鼻窦 图像质量 |
| 英文关键词:spiral CT low dose paranasal sinus image quality |
| 基金项目: |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| ObjectiveTo investigate the clinical application value of low dose 64 slice CT scanning technology in paranasal sinus lesions.Methods200 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 condition of half dose mAs of which was used in conventional group with other parameters remaining the same.Coronal and sagittal images were reconstructed afterward.Data of volume CT dose index (CTDIvol) and dose length product (DLP) were automatically displayed and effective dose (ED) was calculated.Differences of image quality and scanning radiation dose between two groups were analyzed.ResultsThere was no significant difference for image quality between low dose group and conventional group with slightly higher image noise in the former,which will not affect the image interpretation and diagnosis.Radiation dose was significantly decreased for the former,which has a statistical meaning.ConclusionRadiation dose can be significantly reduced with no obvious decrease for image quality using low dose CT scanning technique in paranasal sinus. |
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