骨盆数字断层融合辐射剂量优化

发布时间：2018-03-08 18:17

本文选题：骨盆　切入点：放射摄影术　出处：《中国医学影像学杂志》2014年03期 　论文类型：期刊论文

【摘要】：目的探讨骨盆数字断层融合(DTS)成像的最佳剂量比,以实现骨盆DTS的低剂量检查。资料与方法对18具骨盆标本进行3组骨盆DTS扫描和1组髋关节CT扫描,其中3组骨盆DTS扫描的剂量比参数值分别为6、7、10,比较4组所得图像质量评分和有效剂量。结果 4组有效剂量差异有统计学意义(F=4632.06,P0.001),4组髋关节图像质量评分差异有统计学意义(F=1682.34,P0.001)。4组间检查剂量依次为:6DTS剂量比组7DTS剂量比组10DTS剂量比组CT组;DTS剂量比设置为6时所得图像质量低于其他3组,而DTS剂量比设置为7、10时的图像质量与CT无差别。剂量比设置为7时的DTS图像质量高而检查剂量小。结论剂量比影响骨盆DTS的检查剂量和图像质量,骨盆DTS检查的最佳剂量比为7,在此剂量比设置下,可以在保证诊断质量的前提下实现骨盆DTS的低剂量检查。
[Abstract]:Objective to study the optimal dose ratio of pelvic digital tomography fusion imaging (DTSs) in order to realize the low dose examination of pelvic DTS. Materials and methods 18 pelvic specimens were scanned by DTS in 3 groups and CT scan on hip joint in 1 group. The dose-ratio parameters of pelvic DTS scan in three groups were 6 / 7 / 10, respectively. The image quality score and effective dose of 4 groups were compared. Results the difference of effective dose in 4 groups was statistically significant. The diagnostic dose was: 1: 6DTS dose ratio group 7DTS dose ratio group 10DTS dose ratio group CT group DTS dose ratio set at 6:00 the image quality of the other three groups was lower than that of the other three groups. When the dose ratio of DTS is set to 7, the image quality of 10:00 is not different from that of CT. The image quality of DTS with dose ratio of 7:00 is high and the examination dose is low. Conclusion the dose ratio affects the examination dose and image quality of pelvic DTS. The optimal dose ratio of pelvic DTS examination is 7. The low dose examination of pelvic DTS can be realized on the premise of ensuring the diagnostic quality under the setting of the dose ratio.
【作者单位】：河北医科大学第三医院放射科河北省骨科生物力学重点实验室;
【分类号】：R310

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