基于KARL迭代算法联合低剂量CT扫描在中青年股骨颈骨折中的应用  

Application of KARL iterative algorithm combined with low-dose CT scanning in young and middle-aged patients with femoral neck fractures

作　　者：方金平 李冬冬[1] 郑登峰[1] 刘飞斌 Fang Jinping;Li Dongdong;Zheng Dengfeng;Liu Feibin(Department of Radiology,Taizhou Bo′ai Hospital,Taizhou 318050,China)

机构地区：[1]台州市博爱医院放射科,台州318050

出　　处：《中国医师进修杂志》2023年第10期939-943,共5页Chinese Journal of Postgraduates of Medicine

基　　金：台州市路桥区科技计划项目(2019A23010)。

摘　　要：目的探讨KARL迭代算法联合低剂量CT扫描对中青年股骨颈骨折的应用价值。方法回顾性收集2019年8月至2022年5月在台州市博爱医院经临床和CT确诊的132例中青年股骨颈骨折患者的病历资料,所有患者均采用联影uCT76064排螺旋CT扫描,其中采用滤波反投影重建的常规剂量组68例,采用KARL迭代算法重建的低剂量组64例。比较两组图像质量主观评分、图像优良率和图像客观评价参数CT值、信噪比(SNR)。比较两组辐射剂量(ED)、容积CT剂量指数(CTDIvol)、剂量长度乘积(DLP)。结果两组图像质量主观评分比较差异无统计学意义(P>0.05)。两组图像优良率比较差异无统计学意义(P>0.05)。两组股骨头中心层面骨小梁密集区、同一层面髂腰肌、同一层面腹前壁或臀部皮下脂肪CT值及SNR比较差异无统计学意义(P>0.05)。低剂量组CTDIvol、DLP、ED水平低于常规剂量组[(3.35±1.05)mGy比(12.90±2.92)mGy、(66.33±20.26)mGy/cm比(253.12±58.57)mGy/cm、(0.99±0.30)mSv比(3.79±0.88)mSv],差异有统计学意义(P<0.05)。结论基于KARL迭代算法联合低剂量CT扫描对于中青年股骨颈骨折的临床诊断及分型无明显影响,扫描图像具有较高的客观评估价值,能有效降低患者所受辐射剂量。Objective To investigate the application value of KARL iterative algorithm combined with low-dose CT scanning in young and middle-aged patients with femoral neck fractures.Methods The clinical data of 132 young and middle-aged patients with femoral neck fractures diagnosed by clinical and CT scan in Taizhou Bo′ai Hospital from August 2019 to May 2022 were collected.There were 68 cases in the conventional dose group reconstructed by projection,and 64 cases in the low dose group reconstructed by KARL iterative algorithm.The subjective image quality score,the excellent and good rates and CT value,signal to noise ratio(SNR)were compared between the two groups.The effective dose(ED),CT dose index(CTDIvol),dose-length product(DLP)were compared between the two groups.Results There were no significant differences in subjective image quality score,the excellent and good rates between the two groups(P>0.05).There were no significant differences in CT values and SNR of the trabecular dense area at the central level of the femoral head,the iliopsoas muscle at the same level,and the anterior abdominal wall or buttocks subcutaneous fat at the same level between the two groups(P>0.05).The levels of CTDIvol,DLP and ED in he low-dose group were lower than those in the conventional dose group:(3.35±1.05)mGy vs.(12.90±2.92)mGy,(66.33±20.26)mGy/cm vs.(253.12±58.57)mGy/cm,(0.99±0.30)mSv vs.(3.79±0.88)mSv,there were statistical differences(P<0.05).Conclusions Based on KARL iterative algorithm combined with low-dose CT scanning has no significant effect on the clinical diagnosis and classification of femoral neck fractures,the scanning image has a high objective evaluation value,and can effectively reduce the radiation dose received by patients,which is useful for clinical preoperative diagnosis and surgical planning.

关 键 词：股骨颈骨折 辐射剂量 体层摄影术 X线计算机 KARL迭代算法 

分 类 号：R683[医药卫生—骨科学] R816.8[医药卫生—外科学]