Improving on Algebraic Reconstruction Technique

Abstract

The traditional algebraic reconstruction technique (ART) and some improved ARTs were reviewed, and then, a new ART named simple self-correlative algebraic reconstruction technique (SSART) II was suggested. With numerical simulation technique, a high frequency field is designed. It is simulated to project in all directions with direction resolving rate at pi/180 radian. Twenty-eight projections were selected with direction interval 6pi/180 or 7pi/180. They were applied to reconstruct the model field with ART, simultaneous ART(SART), modified SART(MSART) and SSART, respectively. Each of reconstructed results was analysed by two error indexes, mean square error (MSE) and peak error (PE). All MSE and PE curves were analysed and compared with each other. As the results, ARTs' PE curves oscillated all the time. SARTs' MSE and PE curves all deviated away after filtering stopped. Both MSART's MSE and PE curves weren't smooth. All SSARTs' MSE and PE curves were smooth and stable. Both MSE and PE of SSART II are smallest at the end of iteration. They are 0.00011385 and 0.113065%, respectively. SSART II is super new ART..