X-CARE技术可降低头颅CT辐射剂量:基于体型特异性剂量估算值  

Application of X-CARE technology in reducing radiation dose in head CT using specific size dose estimation

作　　者：王帆[1] 曹伟[1] 梁保辉 王静 WANG Fan;CAO Wei;LIANG Baohui;WANG Jing(Department of Imaging,Xuzhou First People's Hospital,Xuzhou 221000,China;School of Imaging,Bengbu Medical University,Bengbu 233000,China;Department of Imaging,the First Affiliated Hospital of Bengbu Medical University,Bengbu 233000,China)

机构地区：[1]徐州市第一人民医院影像科,江苏徐州221000 [2]蚌埠医科大学影像学院,安徽蚌埠233000 [3]蚌埠医科大学第一附属医院影像科,安徽蚌埠233000

出　　处：《分子影像学杂志》2025年第3期296-301,共6页Journal of Molecular Imaging

基　　金：安徽省高等学校自然科学重点项目(KJ2021A0746)。

摘　　要：目的 分析头颅CT检查时分别使用固定管电流技术、CARE Dose 4D和X-CARE技术时对受检者辐射剂量和图像质量的影响,探求一种保护敏感器官的头颅CT扫描方案。方法 前瞻性收集2023年5月~2024年2月在徐州市第一人民医院接受头颅CT检查的90例患者,将其随机分为A、B、C组,分别使用固定管电流技术、CARE Dose 4D和X-CARE技术,30例/组。在扫描时将热释光剂量计置于患者眼睛表面,比较分析不同组患者的容积CT剂量指数(CTDIvol)、体型特异性剂量估算(SSDE)值以及眼晶状体表面辐射剂量的差异性;由2位放射科医师采用双盲法依据五分制进行图像质量主观评分,利用图像噪声(SD)、信噪比(SNR)和主观评分比较不同组患者图像质量的差异。结果 3组的CTDIvol分别为49.61±0.40、33.85±3.20、32.40±3.11 mGy,SSDE分别为34.26±1.77、28.08±5.34、27.29±5.30 mGy,眼睛表面剂量分别为6.76±0.46、3.41±0.40、2.05±0.73 mSv。相比于使用固定管电流技术,使用CARE Dose 4D和X-CARE技术时辐射剂量CTDIvol分别降低31.76%和34.69%,SSDE分别降低36.55%和38.34%。SSDE较CTDIvol低10.78%。对于图像质量,使用CARE Dose 4D和X-CARE技术时图像的噪声和SNR均低于固定管电流组,但3组图像的主观性评分差异无统计学意义(P>0.05)。结论 相比于SSDE,CTDIvol低估了受检者实际的辐射剂量。X-CARE技术能够在保证图像质量的前提下,有效降低头颅CT扫描的辐射剂量,同时眼睛部分的敏感器官也能得到很好保护。Objective To analyze the impact of using the fixed tube current technique,CARE Dose 4D,and X-CARE technique during head CT examinations on the radiation dose and image quality of the patients,and develop a head CT scanning protocol that can effectively safeguard radio sensitive organs.Methods We prospectively gathered ninety patients for head CT scans at Xuzhou First People's Hospital from May 2023 to Februray 2024 and randomly assigned them to three group,with 30 patients in each group,including the fixed tube current technique(group A),CARE Dose 4D(group B),and the X-CARE technique(group C).The variability of radiation dose in patients across the different groups was analyzed using volume CT dose index(CTDIvol),size-specific dose estimate(SSDE)and radiation dose of eye lens surface comparisons.Two radiologists with rich experience in film reading were used to perform the subjective score of image quality according to the five-point scale by double-blind method,and the differences of image quality among different groups were compared by using the SD,SNR and subjective score of the images.Results The CTDIvol of the A,B and C group were 49.61±0.40,33.85±3.20 and 32.40±3.11 mGy,respectively,SSDE were 34.26±1.77,28.08±5.34 and 27.29±5.30 mGy,respectively.The ocular surface doses were 6.76±0.46,3.41±0.40 and 2.05±0.73 mSv,respectively.Compared with fixed tube current,CARE Dose 4D and X-CARE technology reduced radiation dose CTDIvol by 31.76%and 34.69%,respectively,and SSDE by 36.55%and 38.34%,respectively.SSDE was 10.78%lower than CTDIvol.For image quality,the noise and SNR of the images using CARE Dose 4D and X-CARE techniques were lower than those of the fixed tube current group,but there was no statistically significant difference in subjective scores among the three groups of images(P>0.05).Conclusion X-CARE technology can effectively reduce the radiation dose of head CT scanning while guaranteeing image quality and protecting the sensitive organs in the eyes.

关 键 词：CARE Dose 4D X-CARE 体型特异性剂量估算 辐射剂量 图像质量 

分 类 号：R81[医药卫生—放射医学]