Title :
Tomographic image reconstruction from hollow projections
Author :
Kudo, Hiroyuki ; Saito, Tsuneo
Author_Institution :
Dept. of Electr. Commun., Tohoku Univ., Sendai, Japan
Abstract :
Deals with the tomographic image reconstruction problem from hollow projections. This kind of problem is mainly caused by an X-ray opaque obstruction contained in the object to be imaged. Based on the Cormack´s (1964) inversion formula for the image reconstruction, the mathematical capability of image reconstruction from hollow projections is discussed and a new algorithm for the completion of hollow projections, which utilizes the regularized numerical evaluation of inverse CHT (Circular Harmonic Transform), is presented. In the numerical experiments, the performance of the proposed algorithm is demonstrated and significant improvement of the reconstructed image quality is obtained
Keywords :
computerised picture processing; computerised tomography; Cormack inversion formula; X-ray opaque obstruction; hollow projections; image quality; inverse circular harmonic transform; tomographic image reconstruction; Computed tomography; Degradation; Electromagnetic wave absorption; Image quality; Image reconstruction; Integral equations; Iterative methods; Optical imaging; Surgery; X-ray imaging;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196835
