双能量CT成像不同虚拟单能级图像对喙锁韧带损伤的诊断效能分析  

Analysis on the diagnostic efficacy of different VMIs of DECT imaging for coracoclavicular ligament injury

作　　者：刘超 罗倩 葛仁斌 余琴琴 张蕾[1] Liu Chao;Luo Qian;Ge Renbin;Yu Qinqin;Zhang Lei(Department of Radiology,The First People's Hospital Affiliated to Shanghai Jiaotong University,Shanghai 201600,China)

机构地区：[1]上海交通大学附属第一人民医院放射科,上海201600

出　　处：《中国医学装备》2025年第2期31-36,共6页China Medical Equipment

摘　　要：目的:对比分析喙锁韧带双能量CT(DECT)成像虚拟单能级图像(VMIs)与常规CT图像的图像质量参数,优化喙锁韧带DECT成像图像质量。方法:分析在上海交通大学附属第一人民医院进行DECT扫描的50例患者肩关节DECT图像资料。通过Syngo.via VB20工作站得到40~120 ke V能级的450幅VMIs,将VMIs分为低能级(40、50、60 ke V)、中能级(70、80、90 ke V)和高能级(100、110、120 keV)3组,并与常规CT图像的对比噪声比(CNR)及喙锁韧带走行方向、附着点显示的主观质量评分进行比较。以磁共振成像(MRI)检查结果为“金标准”,评估VMIs诊断肩锁关节脱位患者喙锁韧带损伤的有效性。采用受试者工作特征(ROC)曲线评价VMIs的3组能级图像及常规图像的诊断效能。结果:VMIs中喙锁韧带低能级组40 keV斜方韧带、锥状韧带CNR分别为14.09±3.27、13.9±3.06,中能级组分别为11.89±4.01、12.17±4.08,高能级组分别为9.69±4.25、9.78±4.33,低能级组明显高于中、高能级组,3组比较差异有统计学意义(F=21.1、16.3,P<0.05)。经ROC曲线分析,低能级组诊断喙锁韧带损伤的灵敏度、特异度和ROC曲线下面积(AUC)相对较高,分别为90.05%、91.95%和0.965。DECT的VMIs与MRI检查对喙锁韧带损伤的评估高度一致(Kappa=0.896)。结论:DECT中VMIs可更好显示斜方、锥状韧带走行及附着点,低能级(40~70 keV)VMIs质量最佳,对诊断喙锁韧带损伤具有较好的诊断效能。Objective:To compare and analyze the parameters of image quality of virtual mono-energetic images(VMIs)and conventional computed tomography(CT)images of dual-energy CT(DECT)imaging for the coracoclavicular ligament,and to optimize the image quality of DECT imaging for coracoclavicular ligament.Methods:The DECT image data of shoulder joints of 50 patients who received DECT scan in the First People's Hospital Affiliated to Shanghai Jiao Tong University were retrospectively analyzed.450 VMIs at energy levels of 40 to 120 keV were obtained through the Syngo.via VB20 workstation,and these VMIs were divided into three groups:low energy level(40,50,60 keV),medium energy level(70,80,90 keV),and high energy level(100,110,120 keV).The contrast-to-noise ratio(CNR),the direction of coracoclavicular ligament's rows,and the displayed subjective quality scores of attachment points of VMIs were compared with those of conventional CT images.The results of MRI examination were used as the"gold standard"to assess the effectiveness of VMIs in diagnosing coracoclavicular ligament injuries of patients with acromioclavicular joint dislocation.The diagnostic efficacies of VMIs’the three groups and conventional images were assessed by using receiver operating characteristic(ROC)curve.Results:The CNR values of diagonal ligament and conical ligament at 40 keV of low energy level group of VMIs for coracoclavicular ligament were respectively 14.09±3.27 and 13.9±3.06,and those of medium energy level group were respectively 11.89±4.01 and 12.17±4.08,and those of high energy level were respectively 9.69±4.25 and 9.78±4.33.The CNR value of low energy level group was significantly higher than that of medium and high energy level groups,and the differences were statistically significant(t=21.1,16.3,P<0.05),respectively.The results of ROC curve analysis indicated that the sensitivity,specificity and area under curve(AUC)value of the low energy level group were relatively higher in diagnosing coracoclavicular ligament injury,which were respe

关 键 词：双能量CT(DECT) 虚拟单能级图像(VMIs) 喙锁韧带损伤 对比噪声比 

分 类 号：R816.8[医药卫生—放射医学]