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Table 6 Values of maximum, minimum, metal-free region TV, and NPE in reconstructions of bag #5 (New threshold value to segment the metal image and new β1 = 0.0002)

From: A projection-domain iterative algorithm for metal artifact reduction by minimizing the total-variation norm and the negative-pixel energy

Iterations β1 β2 Min Max TV NPE
0, raw FBP NA NA −0.0347 0.4676 472.6624 0.3366
1000 0.0002 0 −0.0342 0.5251 165.2475 0.0190
1000 0 5 −0.0030 0.5243 180.0589 0.00015141
1000 0.0002 5 −0.0031 0.5252 144.7916 0.0011