不同成像参数下CBCT的成像质量分析  

Image quality of CBCT under different exposure parameters

作　　者：钱军[1] 马芮 谢晓艳[2] 姜丹 邓少纯 段瑶 毋育伟[1] QIAN Jun;MA Rui;XIE Xiaoyan;JIANG Dan;DENG Shaochun;DUAN Yao;WU Yuwei(The 2nd Dental Center,Peking University School and Hospital of Stomatology,100020 China;Department of Oral and Maxillofacial Radiology,Peking University School and Hospital of Stomatology,100020,China)

机构地区：[1]北京大学口腔医学院·口腔医院第二门诊部,100020 [2]北京大学口腔医学院·口腔医院放射科,100020

出　　处：《实用口腔医学杂志》2024年第2期222-226,共5页Journal of Practical Stomatology

基　　金：国家自然科学青年基金(基金:81300851)。

摘　　要：目的:主观评价和客观评估不同成像参数下CBCT的图像质量,分析图像质量的主观评价和客观评价间的关系。方法:分别采用6台不同品牌CBCT扫描仪〔3D Accuitomo(Morita)、i-CAT(Kavo)、5G(NewTom)、Smart3D(北京朗视)、DCT Pro(Vatech)、VGi(NewTom)〕,在各个品牌的典型曝光条件下(电压和电流强度不同)扫描空间分辨率模体和高仿真头模,7位医师对拍摄的CBCT图像进行主观评价打分,比较不同CBCT扫描仪的空间分辨率和对常见口腔解剖结构的可见性。客观评价指标采用各仪器所获的图像空间分辩率(LP/mm)。结果:7位医师的组内一致性和组间一致性均无显著性差异。主观评价New Tom 5G为2分,i-CAT为5分,其余4个品牌匀为4分,客观评价i-CAT的LP/mm为1.8,Smart3D为2.0,其余4个品牌为1.0~1.7。在相同管电流条件下,不同管电压的图像主观质量有显著性差异。在相同管电压条件下,不同管电流的图像主观质量有显著性差异。结论:图像质量的主客观评价具有一定的一致性,不同品牌之间的客观评价差异可能与电压、电流强度不同有关。Objective:To investigate the imaging quality of CBCT under different exposure parameters and the relationship between subjective and objective evaluation.Methods:CBCT scanners of 6 different suppliers〔3D Accuitomo(Morita),i-mCAT(Kavo),5G(NewTom),Smart3D(Beijing Langshi),DCT Pro(Vatech),VGi(NewTom)〕were used to scan the spatial resolution models and head simulators under typical exposure conditions(different device with different tube voltage and current for exposure).The visibility of SedentexCT IQ phantom and anatomical structures generated by different CBCT scanners were compared.For objective evaluation,7 professional evaluators scored CBCT imaging qualities.For subjective evaluation,the resolution(LP/mm)of the images were compared among the devices.Results:No significant difference was found by 7 evaluators either intra or inter of the teams.By objective evaluation,the score of NewTom 5G was 2,that of i-CAT was 5 and that of the others was 4.By subjective evaluation,the LP/mm of i-CAT was 1.8,that of Smart3D was 2.0 and that of the others was 1.0-1.7.The subjective evaluation of image quality obtained under different tube voltages and tube currents were significantly different.Conclusion:The subjective and objective evaluations of image quality are approximately consistent.The difference of the subjective image quality may be produced by the different tube voltage and current for exposure.

关 键 词：锥形束计算机断层扫描 图像质量 主观评价 客观评价 

分 类 号：R816.98[医药卫生—放射医学]