| 吴莉,刘流,杨石平,谢晓洁,韩丹.Flash双源CT智能最佳管电压技术在小儿中耳胆脂瘤面神经管裸露中的应用[J].中国医学影像技术,2015,31(4):527~531 |
| Flash双源CT智能最佳管电压技术在小儿中耳胆脂瘤面神经管裸露中的应用 |
| Application of CARE kV technique in diagnosis of facial canal dehiscence of pediatric middle ear cholesteatoma with Flash dual-source CT |
| 投稿时间：2014-11-07 |
| DOI：10.13929/j.1003-3289.2015.04.012 |
| 中文关键词: 面神经 胆脂瘤 CARE kV 体层摄影术,X线计算机 辐射剂量. |
| 英文关键词:Facial nerve Cholesteatoma CARE kV Tomography, X-ray computed Radiation dosage |
| 基金项目:云南省科技厅应用基础研究计划项目(2003C0087M)。 |
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| 中文摘要: |
| 目的 评价高分辨率CT(HRCT)智能最佳管电压技术(CARE kV技术)在中耳炎患儿颞骨检查中对降低辐射剂量和显示面神经管裸露的应用价值。方法 收集中耳炎患儿(2~4岁)176例;按就诊先后顺序分为A组88例,采用CARE kV技术行颞骨HRCT扫描,B组88例,常规颞骨HRCT扫描。比较两组中耳胆脂瘤、面神经管裸露、HRCT图像质量及辐射剂量情况,并进行统计学分析。结果 A、B两组中耳胆脂瘤发生率[59.09%(52/88)vs 64.77%(57/88)]差异无统计学意义(χ2=0.020,P=0.887)。术前HRCT诊断中耳胆脂瘤的准确率两组间差异无统计学意义[96.15%(50/52) vs 96.49%(55/57),χ2=0.199,P=0.639]。A、B两组术前HRCT诊断面神经管裸露发生率分别为29.54%(26/88)和31.82%(28/88),术中观察面神经管裸露发生率分别为27.27%(24/88)和28.41%(25/88),两组间术前HRCT诊断及术中观察面神经管裸露发生率差异均无统计学意义(χ2=0.978、χ2=0.440,P均>0.05)。鼓室段面神经管裸露发生率最高(25/49,51.02%),迷路段最低(5/49,10.20%)。两组中,前膝段面神经管裸露长度术前HRCT与术中测量值差异有统计学意义(P均<0.05),其余各段差异均无统计学意义(P均>0.05)。两组间CT平均值、噪声(SD)、SNR、CNR差异无统计学意义(P均>0.05)。两组间剂量长度乘积(DLP)、有效剂量(ED)差异均有统计学意义(P=0.039、0.028)。结论 小儿颞骨HRCT智能最佳管电压技术能准确诊断面神经裸露,同时保证图像质量并有效降低辐射剂量。 |
| 英文摘要: |
| Objective To investigate the value of Flash dual-source CT CARE kV technology in diagnosis of the pediatric middle ear cholesteatoma. Methods A total of 176 pediatric chronic otitis (2-4 years old) patients were divided into group A (CARE kV HRCT) and B (conventional HRCT) with 88 cases in each group. CT scanning was performed in all the patients. Differences of middle ear cholesteatoma, facial canal dehiscence, image quality of HRCT and the radiation dosage between group A and B were studied. And statistical analysis was performed. Results There was no statistical difference of middle ear cholesteatoma morbidity between the two groups (59.09% [52/88]vs 64.77%, [57/88]χ2=0.020, P=0.887). No statistical difference of the accuracy in diagnosis middle ear cholesteatoma using HRCT was found between group A and B (96.15% vs 96.49%,[50/52] χ2=0.199,[55/57] P=0.639). In group A and B, the morbidities of facial canal dehiscence were 29.54% (26/88) and 31.82% (28/88) obtained by preoperative HRCT, as well as 27.27% (24/88) and 28.41% (25/88) obtained by intraoperative measurement. There was no statistical difference between the morbidity obtained by preoperative HRCT and intraoperative measurement in the two groups (χ2=0.978, χ2=0.440, both P >0.05). The highest incidence of facial canal dehiscence was found in tympanic cavity section (25/49, 51.02%). And the loest incidence was found in labyrinth segment (5/49, 10.20%). The length of facial canal dehiscence in geniculate ganglion segment obtained by preoperative HRCT was statistically different with that obtained by intraoperative measurement in the two groups (both P<0.05), respectively. No statistical difference of facial canal dehiscence length was found in other segments (all P >0.05). There was no statistical difference of CT value, noise (SD), SNR and CNR between group A and B (all P >0.05). And statistical differences of dose lengthproduct (DLP) and effective dose (ED) were found between the two groups (P=0.039, 0.028). Conclusion CARE kV technology of Flash dual-source CT can not only ensure the quality of the image and the diagnosis accuracy of facial canal dehiscence, but also reduce the CT radiation dose. |
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