目的 :评估能谱CT单能量成像在口腔颌面部降低金属伪影的应用效果。方法 :对46例金属植入物患者进行能谱CT成像,并测量CT值和软组织的SD(标准差)值。生成11个单能量图像组(40~140 ke V,每10 ke V为1组),并进行量化分析。采用SPSS 19.0...目的 :评估能谱CT单能量成像在口腔颌面部降低金属伪影的应用效果。方法 :对46例金属植入物患者进行能谱CT成像,并测量CT值和软组织的SD(标准差)值。生成11个单能量图像组(40~140 ke V,每10 ke V为1组),并进行量化分析。采用SPSS 19.0软件包进行正态性检验和方差检验。结果:20例有正畸矫治器的患者,AI最小值平均为(23.86±10.90)^(24.42±11.54)HU;同样,12例钛板植入物患者,AI最小值平均为(26.49±9.40)^(26.95±8.97)HU;14例牙充填物或固定义齿患者,其中10例AI最小值平均为(29.84±13.04)^(30.97±13.15)HU。3组平均AI值分别为(63.36±70.52)、(70.82±105.14)和(107.35±147.57)HU,与各组70 ke V单能量的平均AI值(61.46±32.06)、(70.18±62.86)和(110.28±78.70)HU相似。3组不同金属植入物患者的能谱扫描平均AI值有显著差异(P<0.05)。结论 :能谱CT成像能明显减少金属伪影的干扰,显著提高金属植入物周围结构的显示能力。70 ke V是金属伪影显著降低的一个分界点;在口腔颌面部区域,去除金属伪影的最佳单能量值范围在110~140 ke V。展开更多
The anatomic relationship of oral and maxillofacial region is very com-plex,due to the large number of sinuses,cavities and spaces,and also closely related to the brain.The diagnosis of oral and maxillofacial lesions ...The anatomic relationship of oral and maxillofacial region is very com-plex,due to the large number of sinuses,cavities and spaces,and also closely related to the brain.The diagnosis of oral and maxillofacial lesions usually depends on the imaging examination.The conventional imaging methods are common CT and X-ray plain films.In recent years,with the rapid development of medical science and technology,more intuitive and vivid three-dimensional images have been applied in the diagnosis and treatment of oral and maxillofacial diseases.Therefore,CT three-dimensional imaging technology has been widely used in clinical practice.This paper reviews this topic.展开更多
文摘目的 :评估能谱CT单能量成像在口腔颌面部降低金属伪影的应用效果。方法 :对46例金属植入物患者进行能谱CT成像,并测量CT值和软组织的SD(标准差)值。生成11个单能量图像组(40~140 ke V,每10 ke V为1组),并进行量化分析。采用SPSS 19.0软件包进行正态性检验和方差检验。结果:20例有正畸矫治器的患者,AI最小值平均为(23.86±10.90)^(24.42±11.54)HU;同样,12例钛板植入物患者,AI最小值平均为(26.49±9.40)^(26.95±8.97)HU;14例牙充填物或固定义齿患者,其中10例AI最小值平均为(29.84±13.04)^(30.97±13.15)HU。3组平均AI值分别为(63.36±70.52)、(70.82±105.14)和(107.35±147.57)HU,与各组70 ke V单能量的平均AI值(61.46±32.06)、(70.18±62.86)和(110.28±78.70)HU相似。3组不同金属植入物患者的能谱扫描平均AI值有显著差异(P<0.05)。结论 :能谱CT成像能明显减少金属伪影的干扰,显著提高金属植入物周围结构的显示能力。70 ke V是金属伪影显著降低的一个分界点;在口腔颌面部区域,去除金属伪影的最佳单能量值范围在110~140 ke V。
文摘The anatomic relationship of oral and maxillofacial region is very com-plex,due to the large number of sinuses,cavities and spaces,and also closely related to the brain.The diagnosis of oral and maxillofacial lesions usually depends on the imaging examination.The conventional imaging methods are common CT and X-ray plain films.In recent years,with the rapid development of medical science and technology,more intuitive and vivid three-dimensional images have been applied in the diagnosis and treatment of oral and maxillofacial diseases.Therefore,CT three-dimensional imaging technology has been widely used in clinical practice.This paper reviews this topic.