A second pass gated reconstruction scheme with conjugate weights

Klaus Erhard; Michael Grass

doi:10.1117/12.812099

13 March 2009 A second pass gated reconstruction scheme with conjugate weights

Klaus Erhard, Michael Grass

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.

Citation Download Citation

Klaus Erhard and 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); https://doi.org/10.1117/12.812099

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