The clinical value of virtual monoenergetic imaging and bone metal artifact reduction algorithm in the reduction of metal artifacts caused by lumbar implants
10.3969/j.issn.1002-1671.2024.02.029
- VernacularTitle:虚拟单能级成像及骨去金属伪影技术去除腰椎内固定伪影的临床应用价值
- Author:
Chenshi ZHANG
1
;
Weimin YUAN
;
Wenwen WANG
;
Xuegao WU
;
Yi XIAO
;
Yuanyuan CUI
Author Information
1. 海军军医大学第二附属医院放射诊断科,上海 200003
- Keywords:
bone metal artifact reduction;
virtual monoenergetic imaging;
dual-layer detector spectral computed tomography;
lumbar implants
- From:
Journal of Practical Radiology
2024;40(2):297-301,310
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the value of high-energetic virtual monoenergetic imaging(MonoE),bone metal artifact reduction(O-MAR),and their combination based on dual-layer detector spectral computed tomography(DLCT)in removing the artifacts caused by lumbar metal implants.Methods Patients who undergone lumbar implant surgery and performed lumbar examination on DLCT after surgery were prospectively selected.MonoE from 100 to 200 keV with an interval of 20 keV were reconstructed.O-MAR and O-MAR combined with MonoE(O-MAR+MonoE)images were also reconstructed.The differences of objective and subjective image quality among the images were compared.Results There were 45 patients included in the study.With the increasing of keV of MonoE,the attenuation of the tissue with low-and high-density artifact on MonoE and O-MAR+MonoE was increased and decreased,respectively.140 keV MonoE was the best sequence for the artifact reduction and the display of soft tissue.200 keV MonoE and its combination with O-MAR showed the best performance in the display of the interface of metal and bone.However,O-MAR+200 keV MonoE had the lowest noise.Conclusion Compared to O-MAR and O-MAR combined with MonoE,high-energetic MonoE shows a good value in the reduction of metal artifacts caused by the lumbar metal implants.
