摘要
目的探讨全智能精确胸部解剖定位CT检查用于筛查发热门诊时,相对常规胸部CT是否具有更好的安全性和更低的辐射剂量。方法选取我院发热门诊227例行胸部CT检查患者的临床和图像资料。其中,80例患者采用常规手动胸部定位扫描,为手动组(A组);147例患者采用全智能精确胸部解剖定位扫描,随机分为半自动组(B组)83例和全自动组(C组)64例。比较各组检查流程的不同。记录患者年龄、性别和身体质量指数(BMI),并观察图像是否符合临床诊断要求。测量扫描视野(FOV)边缘距离肺组织上、下、左、右的最短径(L上、L下、L左、L右)。记录剂量报表中容积CT剂量指数(CTDIvol)和剂量长度乘积(DLP),计算扫描长度(Ls)和有效剂量(E)值。测量乳头平面前后径(AP)和左右径(LR),计算有效直径(ED)和转换因子(fsize),并计算体型特异性剂量估算(SSDE)和体型特异性有效剂量(ESSDE)值。比较患者L上、L下、L左、L右、Ls、E、ED、fsize、ESSDE的组间差异。结果B组和C组检查流程实现医患零接触。A、B和C三组患者年龄、性别、BMI、ED和fsize差异均无统计学意义,临床扫描要求符合率均为100%。从A组至C组,L上、L左、L右、Ls、E和ESSDE均呈逐渐减小趋势(P<0.05)。多重比较结果显示L上、E和ESSDE在3组间两两比较差异均有统计学意义(P<0.05);而L左、L右和Ls仅在A组与另2组间差异有统计学意义(均P<0.05)。结论全智能精确胸部解剖定位CT在筛查发热门诊可能特殊感染患者时,避免了医患接触,并且胸部解剖定位更精确,辐射剂量更低。
Objective To explore whether the fully intelligent CT examination with precise thoracic anatomical location has better safety and lower radiation dose than conventional chest CT in screening patients with probable special infection in fever clinic.Methods The clinical and images data of 227 patients who underwent chest CT examination in fever clinic of the affiliated drum tower hospital of nanjing university medical school were retrospectively analyzed.Among them,80 patients were scanned by chest CT with conventional manual location,which was manual group(group A);147 patients scanned by a fully intelligent CT with precise thoracic anatomical location,83 patients and 64 patients were randomly divided into semi-automatic group(Group B)and fully automatic group(group C)respectively.We compared the different procedures for each group.Age,sex and body mass index(BMI)of patients were recorded,and whether the images met the requirements of clinical diagnosis were observed.We measured the shortest diameters(Lupper,Ldown,Lleft and Lright)between the edges of the scanning field of view(FOV)and the upper,down,left and right lung tissue.Volume CT dose index(CTDIvol)and dose length product(DLP)were recorded in the dose reports,and the scanning lengths(Ls)as well as effective dose(E)values were calculated.The anterior-posterior diameter(AP)and left-right diameter(LR)of nipple plane were measured,which were used to calculate the effective diameter(ED)and conversion factors(fsize),as well as the size-specific dose estimate(SSDE)and size-specific E(ESSDE)values were calculated too.Differences of Lupper,Ldown,Lleft,Lright,Ls,E,ED,fsize and ESSDE between groups were compared.Results The examina-tion proce dures of group B and C achieved zero doctor-patient contact.There was no statistical difference in age,gender,BMI,ED and fsize among patients in group A,B and C,and the coincidence rates of clinical scanning requirements were all 100%.From group A and group C,Lupper,Lleft,Lright,Ls,E and ESSDE all showed a trend of decrease gradually(all P<0.05).Multiple comparison results showed that the Lupper,E and ESSDE had statistical differences between all three groups(all P<0.05),however,the Lleft,Lright and Ls only showed statistical differences between group A and other two groups(all P<0.05).ConclusionFully intelligent CT examination with precise thoracic anatomical location avoids doctor-patient contact when screening patients with probable special infection in fever clinic,and anatomical location of the chest is more accurate,the radiation dose is lower,and the safety of doctors and patients is higher.
作者
史志浩
胡安宁
汪洋
辛晓燕
张鑫
青钊
李茗
王坤
张冰
陈飞
SHI Zhihao;HU Anning;WANG Yang;XIN Xiaoyan;ZHANG Xin;QING Zhao;LI Ming;WANG Kun;ZHANG Bing;CHEN Fei(Department of Radiology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, P.R.China;Department of Radiology, The Yancheng School of Clinical Medicine of Nanjing Medical University (Yancheng Third People's Hospital), Yancheng 224005, P.R.China)
出处
《医学影像学杂志》
2021年第8期1296-1300,共5页
Journal of Medical Imaging
基金
中央高校基本科研业务费专项资金资助(编号:021414380462)
江苏省重点研发计划(社会发展)项目(编号:BE2016605)。
