| 吴莉,韩丹,陈泽谷,何波,杨石平,刘流.CT CARE kV低管电压扫描联合CPR技术术前评估面神经管骨折[J].中国医学影像技术,2015,31(11):1748~1752 |
| CT CARE kV低管电压扫描联合CPR技术术前评估面神经管骨折 |
| CT CARE kV with low dose and CPR in evaluation of facial canal fracture |
| 投稿时间：2015-04-04 修订日期：2015-05-14 |
| DOI：10.13929/j.1003-3289.2015.11.038 |
| 中文关键词: 体层摄影术,X线计算机 面神经管骨折 图像质量 辐射剂量 |
| 英文关键词:Tomography, X-ray computed Facial canal fracture Image quality Radiation dosage |
| 基金项目:云南省科技厅应用基础研究计划项目(2003C0087M)、云南省科技厅-昆明医科大学应用基础研究联合专项(2015FB038)。 |
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| 中文摘要: |
| 目的 探讨智能最佳管电压(CARE kV)低剂量CT扫描及CPR技术在术前评估面神经管骨折中的价值。方法 收集头部外伤伴单侧面瘫患者,采用CARE kV技术进行颞骨HRCT扫描,按就诊先后分4组:A组108例(CARE kV On),管电压120 kVp,B~D组分别为114、105、109例(CARE kV Semi),管电压分别为120 kVp、100 kVp、80 kVp;观察CPR图像面神经管,比较4组患者面神经管骨折发生率、发生部位并与手术结果对照;比较4组间图像质量客观评价指标,包括CT值、噪声(SD)、SNR、CNR及辐射剂量参数[容积CT剂量指数(CTDIvol)、剂量长度乘积(DLP)、有效剂量(ED)]。结果 共纳入436例患者,面神经管骨折174例(174/436,39.91%)。A~D组骨折发生率分别为43.52%(47/108)、39.47%(45/114)、37.14%(39/105)、39.45%(43/109);术前HRCT诊断面神经管骨折与手术结果具有较好的一致性(Kappa>0.5);膝状窝骨折发生率最高(100/174,57.47%),迷路段最低(5/174,2.87%)。A~D组SD、SNR、CNR差异有统计学意义(P<0.05),两两比较除A、B组外余各组间比较差异均有统计学意义(P均<0.05);A~D组CTDIvol、DLP、ED、有效电流差异有统计学意义(P<0.05),经两两比较除A、B组外余各组间比较差异均有统计学意义(P均<0.05)。结论 CARE kV联合CPR术前能够准确评估面神经管骨折情况,并可在满足诊断的前提下降低辐射剂量。 |
| 英文摘要: |
| Objective To investigate value of the combination CARE kV with CPR technique in display facial canal fracture by low dose. Methods A total of 436 patients with head and neck trauma associated with unilateral facial paralysis were enrolled and underwent HRCT with CARE kV technology. Patients were divided into group A (108 cases, CARE kV On, reference voltage and current seted were 120 kVp and 180 mAs respectively), groups B—D (114,105, 109 cases, CARE kV Semi, tube voltage was 120 kVp, 100 kVp, 80 kVp respectively). CPR images were used to display facial canal. Incidence of facial nerve canal fracture, location were compared with surgical results. Subjective and objective assessment (CT value, Standard deviation [SD], SNR, CNR) and radiation measurement parameters (CT dose index of volume [CTDIvol], dose length product [DLP], effective dose [ED]) were compared among 4 groups. Results Facial nerve canal fracture were 174 cases (174/436, 39.91%). Fracture incidence was 43.52% (47/108), 39.47% (45/114), 37.14% (39/105), 39.45% (43/109) in groups A—D, and results of HRCT had consistency with surgical results (Kappa>0.5). Fracture incidence of the geniculate fossa was highest (100/174, 57.47%), labyrinthine segment was the lowest (5/174, 2.87%). SD, SNR, CNR difference among groups A—D had statistically significant (P<0.05), in addition to group A and B, the comparative differences between these 4 groups were statistically significant (P<0.05). Difference of CTDIvol, DLP, ED among groups A—D had statistically significant (all P<0.05), in addition to groups A and B, the comparative differences between these 4 groups were statistically significant (all P<0.05). Conclusion Combination intelligent optimal tube voltage-CARE kV technology with CPR technology in the display of facial nerve tube can reduce radiation dose on the premise of meet the diagnosis. |
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