| 张沉石,管宇,萧毅,姜彦.腰椎金属内固定术后骨去伪影技术的临床应用[J].中国医学影像技术,2016,32(7):1106~1110 |
| 腰椎金属内固定术后骨去伪影技术的临床应用 |
| Clinical application of the technique of removing artifact from the lumbar spine with metal internal fixation |
| 投稿时间：2015-10-12 修订日期：2016-05-06 |
| DOI：10.13929/j.1003-3289.2016.07.031 |
| 中文关键词: 腰椎 体层摄影术 X线计算机 伪影 |
| 英文关键词:Lumber vertebrae Tomography X-ray computed Artifact |
| 基金项目:国家自然科学基金青年基金项目（81501470）、国家自然科学基金面上项目（81370035）、国家自然科学基金重点项目（81230030）、上海市生物医药处重大专项（13411950100） |
|
| 摘要点击次数: 2195 |
| 全文下载次数: 1242 |
| 中文摘要: |
| 目的 探讨骨去金属伪影技术的应用价值。方法 收集接受腰椎CT平扫且资料完整的腰椎金属内固定术后患者64例，随机分为常规组和高剂量组，每组32例。对腰椎金属内固定区进行扫描，常规组和高剂量组的管电压分别为120 kVp和140 kVp。记录每组患者的容积CT剂量指数。对2组图像均行迭代技术重建，常规组另行骨去金属伪影（O-MAR）技术重建。分别对常规组、常规组O-MAR重建及高剂量组图像质量进行评价，并进行统计学分析。结果 常规组O-MAR重建、高剂量组与常规组图像的骨结构清晰度、诊断信心评分差异均有统计学意义（P均<0.05）。与常规组、高剂量组椎弓根钉层面图像比较，常规组O-MAR重建的椎管和邻近肌肉的平均CT值标准差（MSD）较高（P均<0.05），邻近肌肉的平均CT值（MCT）较低（P均<0.05）。与常规组无椎弓根钉层面图像比较，高剂量组椎管MSD较低（P<0.05）。与常规组和高剂量组比较，常规组O-MAR重建后低密度伪影容积较低（P均<0.05），高密度伪影容积较高（P均<0.05）。结论 O-MAR可在不增加患者辐射剂量的条件下，提高骨结构清晰度，增加诊断信心，明显减少低密度伪影。 |
| 英文摘要: |
| Objective To explore the application value of orthopedic metal artifact reduction (O-MAR). Methods Sixty-four patients with lumbar metal internal fixation were collected. They were randomly devided into two groups, i.e. control group (tube voltage 120 kV, n=32) and high tube voltage group (tube voltage 140 kV, n=32). The volume CT dose index was recorded in each group. Images of both groups were reconstructed with iterative technique restructuring, and the images in control group were reconstructed with O-MAR. The images in control group, control group with O-MAR and high tube voltage group were evaluated respectively, and statistical analysis was carried out. Results Compared to control group, the difference of bone structure clarity and diagnostic confidence score in control group with O-MAR and high voltage group had statistical significance (all P<0.05). On the level with pedicle screw, the CT value mean standard deviation (MSD) of canalis centralis medullae spinalis and nearby muscle in control group with O-MAR was higher than that of control group and high tube voltage group (all P<0.05), and the mean CT value (MCT) of nearby muscle in control group with O-MAR was lower than that of control group and high tube voltage group (all P<0.05). On the level without pedicle screw, the MSD of canalis centralis medullae spinalis in high tube voltage group was lower than that of control group (P<0.05). Compared to control group and high tube voltage group, low density artifacts volume in the control group with O-MAR was lower (both P<0.05), and high density artifacts volume was obviously higher (both P<0.05). Conclusion O-MAR technique can be used to improve bone structure clarity, increase diagnostic confidence and reduce low density artifacts. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
