VolumeRAD成像技术与CT的图像质量及辐射剂量对比分析研究

Comparative Analysis of Imaging Quality and Radiation Doses Between Volume RAD and CT

目的分析比较VolumeRAD成像技术与CT的图像质量及辐射剂量,选择合适的X射线检查方式,更好地为临床应用。方法利用体模获取VolumeRAD成像技术、CT的图像并记录各自的辐射剂量。结果 Vol-umeRAD成像技术的低对比分辨力在对比度1%时为4 mm,对比度0.5%时为7 mm,对比度0.3%时为0 mm;高对比分辨力为9 lp/cm;辐射剂量1.26 mGy。CT的低对比分辨力在对比度1%时为2 mm,对比度0.5%时为4 mm,对比度0.3%时为6 mm;高对比分辨力7 lp/cm;辐射剂量28 mGy。结论 VolumeRAD成像技术的图像克服了DR的组织结构重叠,与CT相比,其高对比分辨力高,低对比分辨力低,但其辐射剂量远低于CT,且具有经济、简便、诊断价值强的特点。

Objective To study comparatively the imaging quality and radiation doses between VolumeRAD and CT in order to chose appropriate X - ray examination method for clinic. Methods To get VolumeRAD and CT images by the mod- ule and recorded each radiation doses. Results Low contrast resolutions were 4 mm ,7 mm and 0 mm when contrast were 1%, 0.5% and 0.3% respectively, and high contrast resolution was 9 lp/cm and radiation dose was 1.26 mGy in Vol- umeRAD, while in CT, low contrast resolutions were 2 mm,4 mm and 6 mm when contrast were 1% ,0.5% and 0.3% re-spectively and high contrast resolution was 7 lp/cm and radiation dose was 28 mGy. Conclusion VolumeRAD overcomes the overlaying structures of body tissues in DR and possesses higher high contrast resolution and lower low contrast resolution and much lower radiation dose compared with CT, which has economic, simple and high diagnostic value features.