诊断学理论与实践

诊断学理论与实践 ›› 2018, Vol. 17 ›› Issue (01): 66-69.doi: 10.16150/j.1671-2870.2018.01.012

• 论著 • 上一篇    下一篇

口腔种植定位术前评估中颌骨低剂量多层螺旋CT检查的应用

胡蒙1, 朱怀仕1, 宋琦2   

  1. 1.上海市黄浦区中心医院放射科,上海 200002;
    2.上海交通大学医学院附属瑞金医院放射科,上海 200025
  • 收稿日期:2017-11-01 发布日期:2018-02-25
  • 通讯作者: 宋琦 E-mail: songqi_718@163.com
  • 基金资助:
    黄浦区卫计委科研项目（HKW201508）

Low dose muti-slice computed tomography in preoperative evaluation of location for dental implantation procedure

HU Meng1, ZHU Huaishi1, SONG Qi2   

  1. 1. Department of Radiology, Central Hospital of Huangpu District, Shanghai 200002, China;
    2. Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 20025, China
  • Received:2017-11-01 Published:2018-02-25

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摘要： 目的：探讨颌骨低剂量多层螺旋CT（muti-slice computed tomography, MSCT）成像技术在口腔种植定位术前评估中的临床价值。方法：将80例口腔种植术前的患者随机分为4组,每组20例,使用SIEMENS Definition AS40 CT机,在其他扫描参数相同的情况下分别采用60 mA、50 mA、40 mA的管电流进行颌骨MSCT扫描,并与常规管电流90 mA组（20例）进行对比,记录4组不同毫安的容积CT剂量指数（volume computed tomography dose index, CTDIv）和放射线剂量长度乘积（dose length product,DLP）,分析比较4组间的CTDIv、DLP及图像质量。结果：40 mA、50 mA、60 mA、90 mA 4组间比较,CTDIv、DLP存在差异（P<0.05）,而将4组进行两两组间比较,则除了60 mA组与90 mA组间的CTDIv、DLP差异无统计学意义（P>0.05）外,其余任意2组间的CTDIv、DLP差异均存在统计学意义（P<0.05）。4组间的图像质量差异无统计学意义（P>0.05）。结论：采用40 mA低剂量MSCT扫描既能保证图像质量,又能满足临床术前诊断的需求,并可大幅度（35.0%）降低患者所受辐射剂量。

关键词: 低剂量多层螺旋CT, 口腔种植, 辐射剂量

Abstract: Objective: To investigate the value of low dose muti-slice computed tomography (MSCT) in preoperative evaluation of location for oral implantation procedure. Methods: A total of 80 patients planned to receive oral implantation procedure were enrolled, and were divided into 4 groups, with 20 patients in each group. SIEMENS Definition AS40 CT was used for MSCT scanning with the low dose of 40 mA, 50 mA, 60 mA and the conventional dose of 90 mA in the 4 groups, respectively. Volume CT dose index (CTDIv) and dose length product (DLP) were calculated, and image quality was compared between the 4 groups. Results: Except that there was no significant difference in CTDIv, DLP between 60 mA and 90 mA groups, significant difference was found in CTDIv, DLP between any of the other 2 groups. Image quality between the 4 groups were similar. Conclusions: For MSCT, low dose of 40 mA not only can guarantee the image quality but also can meet the needs of preoperative evaluation of location for oral implantation procedure and may sharply decrease the radiation dose（35.0%）.

Key words: Low dose, muti-slice computed tomography, Oral planting, radiation dose

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