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. Author manuscript; available in PMC: 2020 Apr 1.
Published in final edited form as: Invest Radiol. 2019 Apr;54(4):204–211. doi: 10.1097/RLI.0000000000000535

Figure 3.

Figure 3.

59-year-old female with posterior rod and screw fixation of L2-L5 and a posterolateral bone graft demonstrating improved visualization of critical anatomic structures of the spine with threshold high (TH) Sn140 kV PCD-CT. EID-CT 120 kV (A-B) and TH Sn 140 kV PCD-CT (C-D) axial images from the same patient. The TH Sn 140 kV PCD-CT images (C-D) have reduced metal artifact compared with the EID-CT images (A-B) showing improved visualization of the central canal, neural foramina, and nerve roots which are the overall most improved critical anatomic structures in this study. The metal artifact reduction is predominantly evident with the soft tissue algorithm (A) vs. (C) than with the bone algorithm (B) vs. (D). In this particular example, the readers mean evaluation scores for central canal, neural foramina, and nerve roots for TH Sn 140 kV PCD-CT (C-D) were 3.7, 4.0, and 4.0 vs. 0.3, 3.0, and 2.3 for EID-CT (A-B), respectively. A, C: W/L = 400/40 HU. B, D: W/L = 1500/450 HU.