Fig. 3

Reconstructed images of the circular texture from the FBP, the TV and the DDTV algorithm. The first to third rows refer to the FBP (a–c), the TV (d–f) and the DDTV (g–i) reconstructed images, respectively. The first to third columns refer to 180-view (a, d, g), 90-view (b, e, h) and 30-view (c, f, i) sampling results, respectively