Rotating polar-coordinate ART applied in industrial CT image reconstruction

With incomplete or noisy projections, algebraic reconstruction technique (ART) algorithms can get better image qualities than convolution back-projection (CBP) algorithm. But, it's too slow to meet the practical industrial requirements. Rotating polar-coordinate technique was introduced into ART in this paper, forming Polar-ART (PART) algorithm. PART is 2.7 times as fast as ART with nearly the same quantitative accuracy and it does not need as much memory as ART, which is proved by experiments on 60Co container CT inspection system. A drawback of PART is the loss of resolution in reconstructed images.