Abstract：Objective To compare and analyze the advantages and disadvantages of OMAR iterative de-artifact technique and
dual-energy linear fusion de-artifact technique in removing metal artifacts in vertebral metal implants and oral metal foreign
body CT imaging. Methods A total of 25 patients and 15 patients with thoracic implants were selected. Spiral CT scans were
performed twice and 3d reconstruction was performed. For the first time, conventional scanning thin layer reconstruction was
performed with OMAR reconstruction, and conventional images were reconstructed with the same thin layer. Double-energy
scanning and thin-layer reconstruction were used for the second time, and linear fusion was used to remove artifacts. Conventional
thin layer obtained from the two scans was compiled as group A, OMAR iterative reconstruction thin layer image was compiled as
group B, and dual-energy linear fusion de-artifact thin layer image was compiled as group C. The image layers were both 1 mm
thick and 1mm apart. SD values before and after metal screws were measured, SNR values were calculated, data were recorded and
statistical software was used for statistical analysis. The three groups of images were reconstructed by post-processing using MPR,
MIP and VR. Two attending radiologists were invited to score the obtained images and thin-layer images with a double-blind
method using a 5-point method. The scores were recorded and analyzed using statistical software. Results The image scores
were group B>group C>group A, conventional group (P<0.05), and SNR value was group B>group C>group A (P<0.05). The SD
values of group A>group C>group B (P<0.05). Conclusion OMAR iterative reconstruction can not only remove artifacts and obtain
high quality images, but also obtain higher image quality than linear fusion.
刘豹a，石明国a，李剑a，陈寒a，陈培源a，石磊b. OMAR迭代去伪影技术与双能量线性融合去伪影技术的对比性研究[J]. 中国医疗设备, 2019, 34(6): 23-26.
LIU Baoa, SHI Mingguoa, LI Jiana, CHEN Hana, CHEN Peiyuana, SHI Leib. Comparative Study of OMAR Iterative De-artifact Technique and
Bienergy Linear Fusion De-Artifact Technique. China Medical Devices, 2019, 34(6): 23-26.
