Author:
Bhowmik Ujjal,Zafar Iqbal M.,Adhami Reza
Abstract
AbstractHead motion during Computed Tomographic (CT) brain imaging studies can adversely affect the reconstructed image through distortion, loss of resolution and other related artifacts. In this paper, we propose a marker based innovative approach to detect and mitigate motion artifacts in three dimensional cone-beam brain CT systems without using any external motion tracking sensor. Motion is detected using correlations between the adjacent projections. Once motion is detected, motion parameters (i.e. six degrees-of-freedom of motions) are estimated using a numerical optimization technique. Artifacts, caused by motions, are mitigated by using a modified form Feldkemp-Davis-Kress (FDK) algorithm which uses the estimated motion parameters in back-projection stage. The proposed approach has been evaluated on a modified three-dimensional Shepp-Logan phantom with a range of simulated motions. Simulation results demonstrate a quantitative and qualitative validation of motion detection and artifacts mitigation technique.
Subject
Electrical and Electronic Engineering,Mechanical Engineering,Aerospace Engineering,General Materials Science,Civil and Structural Engineering,Environmental Engineering
Reference23 articles.
1. Linney N.C., Gregson P.H., Organ motion detection in ct images using opposite rays in fan-beam projection systems, IEEE Trans. Med. Imaging, Vol. 20, 2001, 1109–1122
2. Green M.V., Seidel J., Stein S.D., Tedder T.E., et al., Head movement in normal subjects during simulated PET brain imaging with and without head restraint, J. Nucl. Med., Vol. 35, No. 9, Sept. 1994, 1538–1546
3. Ritchie C.J., Methods for reducing motion artifacts in computed tomography scans of the chest, Ph.D. Dissertation, Univ. Washington, Seattle, 1993
4. Boyd D.P., Lipton M.J., Cardiac computed tomography, Proc. IEEE, Vol. 71, Mar. 1983, 298–307
5. Robb R.A., Hoffman E.A., Sinak L.J., Harris L.D., et al., High speed three-dimensional X-ray computed tomography: The dynamic spatial reconstructor, Proc. IEEE, Vol. 71, Mar. 1983, 308–319
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献