Application of full-length lower extremity CT with various noise index in robot-assisted total knee arthroplasty
10.3969/j.issn.1002-1671.2025.03.031
- VernacularTitle:基于不同噪声指数的下肢全长CT在机器人辅助全膝关节置换术中的应用效果
- Author:
Yi WANG
1
;
Yaling GAO
1
;
Peiyan HU
1
;
Pengcheng SHAN
1
;
Hui SUN
1
;
Juan ZHANG
1
Author Information
1. 中国中医科学院望京医院放射科,北京 100102
- Publication Type:Journal Article
- Keywords:
full length of lower limbs;
low-dose CT;
noise index;
robot-assisted total knee arthroplasty
- From:
Journal of Practical Radiology
2025;41(3):496-500
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the application value of full-length lower extremity CT scans performed at different noise index(NI)in terms of image quality and radiation dose for robot-assisted total knee arthroplasty(RTKA).Methods Eighty patients who underwent RTKA were selected and randomly divided into four groups based on different NI:NI=8,NI=18,NI=28,and NI=38.Subjective scores were assigned to the full-length lower extremity CT images and the three-dimensional skeletal models generated by volume rendering(VR)post-processing.Objective evaluations were performed using three indicators:dose length product(DLP),volume CT dose index(CTDIvol),and hip-knee-ankle angle(HKA).The application value of full-length lower extremity CT scans in RTKA was analyzed.Results(1)As the NI value increased,the subjective scores of thin-slice images decreased.Images with NI between 8 and 18 met the imaging diagnostic standards,while those with NI higher than 18 were unacceptable.(2)As the NI value increased,all VR skeletal models met the acceptance criteria for RTKA.(3)As the NI value increased,DLP and CTDIvol gradually decreased,with statistically significant differences(P<0.05),However,in the comparison between the NI=28 and NI=38 groups,the difference was not statistically significant(P>0.05).Conclusion Performing full-length lower extremity CT scans with an NI of 28 not only meets the preoperative planning requirements for RTKA but also minimizes the radiation dose.
