| 王志康,孙建忠,章伟敏.平板DSA和II/TV DSA在透视下的影像质量和辐射剂量比较[J].中华放射医学与防护杂志,2006,26(4):392-395 |
| 平板DSA和II/TV DSA在透视下的影像质量和辐射剂量比较 |
| Comparison of imaging quality and radiation dose between flat detector DSA and II/TV DSA in fluoroscopic application |
| 投稿时间：2005-12-26 |
| DOI： |
| 中文关键词: 平板成像系统 数字减影血管造影 低剂量透视 影像质量 阈值对比度-细节检测能力 |
| 英文关键词:Flat plate imaging system DSA Low dose fluoroscopy Image quality Threshold contrast-detail detectability |
| 基金项目:浙江省卫生科技基金资助项目(2004A039) |
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| 中文摘要: |
| 目的 探讨比较平板(FD)DSA系统(飞利浦Allura Xper FD20,荷兰)和II/TVDSA系统(飞利浦Integris CV12,荷兰)之间在透视应用中的辐射剂量和影像质量差异。方法 根据阈值对比度-细节检测能力(TCCD)技术,分别利用两系统在X线探测器面入射空气比释动能率(EAK)为5、10、20、40、60和80nGy/帧的辐射剂量下对T0[10]体模进行透视检测,由3位观察者采用双盲法对透视影像进行观察评分,计算阈值检测指数(HT),并作检测指数图。结果 在EAK为5nGy/帧时,两系统的HT值基本持平,随着EAK的增加,FD DSA的HT值明显提高,而II/TVDSA的HT值提高较缓慢,且当辐射剂量过高时反而降低。实际临床使用中,在相同的HT值下,FD DSA的透视剂量不到II/TVDSA的50%。结论 FD DSA透视影像质量好于II/TVDSA,在获得同等透视影像质量时,平板DSA可大大降低病人和医务人员接受的X线辐射剂量。 |
| 英文摘要: |
| Objective To evaluate and compare the difference in image quality and radiation dose between flat detector(FD) DSA(PHILIPS Allura Xper FD20, Holland) and II/TV DSA (PHILIPS Integris CV12, Holland) in fluoroscopic application. Methods Based on threshold contrast_detail detectability (TCCD) technique, phantom T0 10 was tested by both systems with the following entrance air kerma(EAK) levels at the X ray detector entrance plane: 5, 10, 20, 40, 60 and 80 nGy/frame in fluoroscopic application. Three observers scored each fluoroscopy image sequence using double blind method, calculated the threshold detection index(HT), and drew the detection index figures. Results Both systems have the same HT value when EAK level was 5 nGy/frame.As the EAK level was increased, the HT value of FD DSA system increased broadly, but the II/TV system increased slowly. However the HT value of the II/TV system decreased if the EAK level was increased too high. Radiation dose of the FD DSA was less than half of the II/TV DSA radiation dose during clinical application at the same HT value. Conclusion Image quality of the FD DSA is better than II/TV DSA. The FD DSA will reduce the radiation dose to the patient and doctor greatly comparing with II/TV DSA at the same image quality. |
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