The Clinical Value of MAC Technology in Reducing CT Scan of
Metal Artifacts After Cervical Internal Fixation
PAN Xuelin1，HONG Jing2，YUAN Yuan2，YANG Fan1，SHAO Qiang3，LI Zhenlin1
1. Department of Radiology, West China Hospital of Sichuan University, Chengdu Sichuan 610041, China丨
2. Department of Radiology, Yongchuan Hospital of Chongqing Medical University, Chongqing 402160, China丨
3. Shanghai United Imaging Healthcare Co., Ltd., Shanghai 201100, China
Abstract：Objective To explore the clinical value of metal artifact correction (MAC) technology in reducing CT metal artifacts
after cervical metal internal fixation implantation. Methods A total of 106 patients who underwent cervical CT reexamination after
cervical metal internal fixation implantation were randomly selected. The original data were reconstructed in two ways. Group A
used KARL iterative image reconstruction technique, and group B was reconstructed using MAC technology. The CT value and
noise value standard deviation (SD) of A and B images were measured respectively, and the signal to noise ratio (SNR) and contrast
to noise ratio (CNR) were calculated. Two experienced radiologists used double-blind method to subjectively evaluate the images
of group A and B. Results Based on CT value, the median SD value, its upper and lower quartile of each measurement point, the
CT and SD value of high-density artifact point of group A were higher than that of group B丨 the CT value of low-density artifact
point of group A was lower than that of group B, and the SD value of group A was higher than that of group B丨 the differences were
statistically significant (P<0.05). There was no statistical significant difference in CT value and SD value between the soft tissue
measurement points of group A and B (P>0.05). The SNR, CNR and subjective scores of group A were all lower than those of group B, with
statistical significant differences (P<0.05). Conclusion For the CT reexamination after cervical metal internal fixation implantation,
MAC reconstruction of original images can significantly reduce the metal artifacts generated by internal fixation, which can not only
obtained from better image quality, but also improve the flux of CT examination.
潘雪琳1，洪静2，袁元2，杨帆1，邵强3，李真林1. MAC技术在降低颈椎金属内固定术后CT扫描金属伪影的临床价值[J]. 中国医疗设备, 2021, 36(11): 81-85.
PAN Xuelin1，HONG Jing2，YUAN Yuan2，YANG Fan1，SHAO Qiang3，LI Zhenlin1. The Clinical Value of MAC Technology in Reducing CT Scan of
Metal Artifacts After Cervical Internal Fixation. China Medical Devices, 2021, 36(11): 81-85.
