13 March 2009 A second pass gated reconstruction scheme with conjugate weights
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Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 725834 (2009) https://doi.org/10.1117/12.812099
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States
Abstract
Rotational X-ray data acquisition in combination with gated reconstruction is applied most commonly to reconstruct 3D or 4D images of the heart on interventional X-ray systems. The data are acquired during breath hold and with intravenous contrast agent injection. Unfortunately, when using a single circular arc acquisition with parallel ECG recording, the gating of the projections leads to under-sampling artifacts in the reconstruction volume. In this contribution an artifact reduction method is suggested which is based on an initial gated reconstruction of a cardiac volume at limited quality, the subsequent segmentation of the volume and a second pass correction to enhance the signal-to-noise ratio in the reconstruction volume and to reduce the artifacts due to gating. The method is applied to both phantom and animal data.
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Klaus Erhard, Michael Grass, "A second pass gated reconstruction scheme with conjugate weights", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 725834 (13 March 2009); doi: 10.1117/12.812099; https://doi.org/10.1117/12.812099
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