Title :
Motion-based projection generation for 4D-CT reconstruction
Author :
Dhou, Salam ; Hugo, Geoffrey D. ; Docef, Alen
Author_Institution :
Brigham & Women´s Hosp. Boston, Boston, MA, USA
Abstract :
A method for reducing streaking artifacts in 4D-CT reconstruction by generating additional projections is proposed. This method uses optical flow to track anatomy motion across the complete set of projections and then uses this information to compute interpolated projections while compensating for breathing motion. Original and interpolated projections, all belonging to one respiratory phase, are used to reconstruct a 4D-CT volume. Experimental results showed that the proposed method reduces artifacts and blurring in reconstructed 4D-CT volumes and improves the image quality.
Keywords :
computerised tomography; image motion analysis; image reconstruction; image restoration; image sequences; medical image processing; motion compensation; 4D-CT volume reconstruction; anatomy motion tracking; blurring reduction; breathing motion compensation; computerised tomography; image quality; interpolated projections; motion-based projection generation; optical flow; respiratory phase; streaking artifacts reduction; Computed tomography; Computer vision; Image edge detection; Image motion analysis; Image reconstruction; Interpolation; Phantoms; CT reconstruction; interpolation; motion modeling; optical flow;
Conference_Titel :
Image Processing (ICIP), 2014 IEEE International Conference on
Conference_Location :
Paris
DOI :
10.1109/ICIP.2014.7025340
