Optimized time window for cardiac CT reconstruction based on Doppler tissue imaging (DTI) data

Rui Guerra; Andre Codreanu; Yannick Ponvianne; Romain Grosjean; Jacques Felblinger

doi:10.1117/12.654348

2 March 2006 Optimized time window for cardiac CT reconstruction based on Doppler tissue imaging (DTI) data

Rui Guerra, Andre Codreanu, Yannick Ponvianne, Romain Grosjean, Jacques Felblinger

Proceedings Volume 6142, Medical Imaging 2006: Physics of Medical Imaging; 61420K (2006) https://doi.org/10.1117/12.654348
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

Optimal time windowing in cardiac CT reconstruction would permit a reduction of motion artifacts. We used Doppler Tissue Imaging (DTI) in order to acquire the speed and displacement of region of interest in one direction with a high temporal resolution. Applied on different segments of coronary arteries, 3D information is recovered in three quasi orthogonal acquisitions (abdominal, parasternal and apical views). Their reproducibility was carried on five healthy subjects. This experiment will allow finding the best time window for reconstruction. A window of half the rotation time (250ms for our CT) was estimated based on minimization of the motion variation in 3D. Since we obtained a high reproducibility between the two sessions (generally < 2mm) DTI could be an interesting approach to evaluate motion in 3D. This yields more information as compared to 2D data. Future work will require additional acquisitions and experiments in order to analyze more in depth the variability and the influence of the heart rate. The collected data will be used also as input for our motion platform and CT simulation.

Citation Download Citation

Rui Guerra, Andre Codreanu, Yannick Ponvianne, Romain Grosjean, and Jacques Felblinger "Optimized time window for cardiac CT reconstruction based on Doppler tissue imaging (DTI) data", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 61420K (2 March 2006); https://doi.org/10.1117/12.654348

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KEYWORDS

Heart

3D acquisition

Diffusion tensor imaging

Arteries

Image segmentation

Laser phosphor displays

Computed tomography

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