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- W2362185890 abstract "Objective To investigate the clinical value of gemstone spectral imaging(GSI) and multi artifact reduction system(MARs)in reducing metal artifacts on HDCT,and find the best monochromatic images.Methods Fifteen patients with metal implants of spine in our hospital received GSI examination and MARs reconstruction.Eleven groups of monochromatic images and 11 groups monochromatic + MARs images were obtained from 40 keV to 140 keV every interval of 10 keV by the special GSI viewer,respectively.The images of severe artifacts level(A) and no or less artifacts level(B) were selected for every group monochromatic image or monochromatic + MARs image.The CT value and SD value of the region of interest(ROI) and adjacent fatty tissue were measured and analyzed.Results In the monochromatic images at 110 keV,the SD value of A and B levels were 54.12±8.35 and 34.77±3.50.There was no significant difference(t=2.32,P0.05).Other 10 groups had significant difference(P0.05).There was significant difference(P0.05) on SD value of A and B levels in every monochromatic + MARs group.The optimal CNR was acquired at the energy level of 70 keV(CNR=9.2±5.07).Although hyperdensity metal artifacts were decreased in 110 keV+MARS images,image distortion was generated.Conclusion The monochromatic images at 110 keV have the best image quality in reducing metal artifacts on HDCT.The image quality of 110 keV is better than that of 110 keV+MARs images.Although 70 keV images have the optimal CNR,noise is higher than 110 keV images,it is not beneficial for diagnosis." @default.
- W2362185890 created "2016-06-24" @default.
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- W2362185890 date "2012-01-01" @default.
- W2362185890 modified "2023-09-23" @default.
- W2362185890 title "The Comparative Study of GSI and MARs in Reducing the Spinal Metal Artifacts on HDCT" @default.
- W2362185890 hasPublicationYear "2012" @default.
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