2014
DOI: 10.1088/0031-9155/59/12/3121
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Image artefact propagation in motion estimation and reconstruction in interventional cardiac C-arm CT

Abstract: The acquisition of data for cardiac imaging using a C-arm CT system requires several seconds and multiple heartbeats. Hence, incorporation of motion correction in the reconstruction step may improve the resulting image quality. Cardiac motion can be estimated by deformable 3-D/3-D registration performed on initial 3-D images of different heart phases. This motion information can be used for a motion-compensated reconstruction allowing the use of all acquired data for image reconstruction. However, the result o… Show more

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Cited by 18 publications
(12 citation statements)
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“…In contrast, the scan acquired with a radial sampling pattern in Figure 2(c) exposes some blurred streaks in diagonal direction. Note that this artefact is very similar to CT imaging [21]. The direction of these streaks depends on which radial spokes in k -space are affected by the patient movement and thus the time point in the acquisition.…”
Section: Resultsmentioning
confidence: 75%
“…In contrast, the scan acquired with a radial sampling pattern in Figure 2(c) exposes some blurred streaks in diagonal direction. Note that this artefact is very similar to CT imaging [21]. The direction of these streaks depends on which radial spokes in k -space are affected by the patient movement and thus the time point in the acquisition.…”
Section: Resultsmentioning
confidence: 75%
“…This gives rise to a strong need for motion compensation algorithms [2]. In recent years, consistency conditions have been shown to be promising in this context [3,4].…”
Section: Introductionmentioning
confidence: 99%
“…Many of these are with respect to 4D imaging, and for the purposes of this paper are referred to as “motion compensation” methods, since the goal is often to model and visualize such motion (c.f., “motion correction” methods considered below, in which any anatomical motion is undesirable and the goal is to form a 3D image free of motion artifact). Several motion compensation methods have employed gating for cyclical motion (either prospective or retrospective), most notably for periodic motion of the lungs and heart in thoracic imaging (Rit et al 2009, Rohkohl et al 2013, Muller et al 2014). These methods typically use a general or patient-specific motion model to divide projection data into various phases.…”
Section: Introductionmentioning
confidence: 99%