| MSCT扫描方式对鼻咽部图像质量及辐射剂量的影响 |
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| 引用本文： | 张海波,付传明,徐霖,龚晓虹,周选民,陈伦刚,陈平友. MSCT扫描方式对鼻咽部图像质量及辐射剂量的影响[J]. 临床放射学杂志, 2011, 30(11) |
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| 作者姓名： | 张海波 付传明 徐霖 龚晓虹 周选民 陈伦刚 陈平友 |
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| 作者单位： | 湖北医药学院附属太和医院放射影像中心,湖北十堰,442000 |
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| 摘 要： | 目的前瞻性探讨多层螺旋CT(MSCT)扫描方式对鼻咽部图像质量及辐射剂量的影响。资料与方法采用GE16排螺旋CT(Lightspeed16)以相同曝光量/周及扫描范围对60例鼻咽部患者在不同扫描方式下行MSCT检查。轴位扫描采用:16通道、2i/周、4i/周和扫描层厚5mm、重建层厚1.25mm序列组合即Axial(1)、Axial(2);螺旋扫描采用:16通道、扫描层厚5mm、重建层厚0.625mm、螺距0.938:1、床速9.37组合即Helical;其他的扫描参数相同:mAs、kV、标准重建、显示野、扫描野。扫描结束后机器自动记录CT剂量指数(CTDIvol)、剂量长度乘积(DLP),射线有效率(Dose);在AW4.2工作站分别测量轴位和冠状位图像上两侧翼肌及一侧咽鼓管圆枕的CT值的标准差视为图像噪声值。对不同扫描方式及组合的辐射剂量进行比较,并对图像噪声值进行q检验。结果 Axial(1)、Axial(2)和Helical三组之间的图像质量没有统计学差异(轴位P=0.821、q=0.204,冠状位P=0.974、q=0.027),轴位扫描图像比螺旋扫描图像更清楚;有效剂量(ED)分别为:1.08mS...
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| 关 键 词： | 体层摄影术 X线计算机 鼻咽 辐射剂量 图像质量 |
The Influence of MSCT Scan Mode on the Image Quality and Radiation Dosage in Pharynx Nasalis |
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| ZHANG Haibo,FU Chuanming,Xu Lin,et al.. The Influence of MSCT Scan Mode on the Image Quality and Radiation Dosage in Pharynx Nasalis[J]. Journal of Clinical Radiology, 2011, 30(11) |
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| Authors: | ZHANG Haibo FU Chuanming Xu Lin et al. |
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| Affiliation: | ZHANG Haibo,FU Chuanming,Xu Lin,et al.Department of Radiology,Affiliated Taihe Hospital,Hubei Medical Colledge,Shiyan 442000,P.R.China |
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| Abstract: | Objective To discuss he influence of MSCT scan mode on the image quality and radiation dosage in pharynx nasalis.Materials and Methods 60 patients with pharynx nasalis symptom received helically and axially in the same exposure per circumference and the same scan range with 16 slice MSCT(Light speed 16,GE).The scan parameters were as follow:axial scan:16 passages,2i per circumference and scan thickness 5 mm,reconstructed thickness 1.25 mm:helical scan:16 passages,scan thickness 5mm,reconstructed thickness 0... |
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| Keywords: | Tomography X-ray computed Pharynx nasalis Radiation dosage Image quality |
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