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. Author manuscript; available in PMC: 2019 Apr 19.

Published in final edited form as: Phys Med Biol. 2018 Apr 19;63(8):085014. doi: 10.1088/1361-6560/aab68d

Reconstructed images of Catphan Phantom. (1)–(4) show the images reconstruction by FDK, TV, EPTV, PCTV, respectively at 25mAs (250 projections, 10 mA/10ms per projections). (5) shows high dose FDK at 200mAs((250 projections, 53 mA/15 ms per projections). (a)–(c) show the reconstructed images of Catphan multi-contrast slice.(b1)–(b5) Zoom in the right block shown in (a5). (c1)–(c5) Zoom in the left block shown in (a5). Arrows in (b) and (c) show that PCTV is superior to EPTV and TV in the low contrast edge enhancement. (d)–(e) show the reconstructed images of Catphan resolution slice. (e1)–(e5) Zoom in the corresponding part in the first-row images. Arrows in (e) show that PCTV and EPTV can achieve 6 lp/cm while reduce noise, which is superior to TV.

Reconstructed images of Catphan Phantom. (1)–(4) show the images reconstruction by FDK, TV, EPTV, PCTV, respectively at 25mAs (250 projections, 10 mA/10ms per projections). (5) shows high dose FDK at 200mAs((250 projections, 53 mA/15 ms per projections). (a)–(c) show the reconstructed images of Catphan multi-contrast slice.(b1)–(b5) Zoom in the right block shown in (a5). (c1)–(c5) Zoom in the left block shown in (a5). Arrows in (b) and (c) show that PCTV is superior to EPTV and TV in the low contrast edge enhancement. (d)–(e) show the reconstructed images of Catphan resolution slice. (e1)–(e5) Zoom in the corresponding part in the first-row images. Arrows in (e) show that PCTV and EPTV can achieve 6 lp/cm while reduce noise, which is superior to TV.