Robust temporal resolution of MSCT cardiac scan by rotation-time update scheme based on analysis of patient ECG database

S. Glasberg; D. Farjon; M. Ankry; S. Eisenbach; M. Shnapp; A. Altman

doi:10.1117/12.705186

13 March 2007 Robust temporal resolution of MSCT cardiac scan by rotation-time update scheme based on analysis of patient ECG database

S. Glasberg, D. Farjon, M. Ankry, S. Eisenbach, M. Shnapp, A. Altman

Author Affiliations +

Proceedings Volume 6510, Medical Imaging 2007: Physics of Medical Imaging; 65102Q (2007) https://doi.org/10.1117/12.705186
Event: Medical Imaging, 2007, San Diego, CA, United States

Abstract

We have analyzed 144 ECG wave-forms that were taken during cardiac CT exams to determine in retrospect the optimized timing for updating the gantry rotation-time. A score was defined, according to the number of heart beats during X-ray on, which fulfill the temporal resolution (tR)condition, tR<100mSec. The temporal resolution calculation was based on dual-cycle π/2 sector segmentation, where the data required for any image is collected during two heart cycle. The results yield a significant improvement of the tR score with the rotation-time update method relative to using a fixed minimal rotation-time of the gantry. The analysis suggest that full heart scan with better than 100mSec temporal resolution per slice can routinely be achieved in 128 slices MSCT scanner by performing gantry rotation-time -update after patient starts its breath hold. At these conditions the required breath-hold time is expected to be less than 15 seconds.

Citation Download Citation

S. Glasberg, D. Farjon, M. Ankry, S. Eisenbach, M. Shnapp, and A. Altman "Robust temporal resolution of MSCT cardiac scan by rotation-time update scheme based on analysis of patient ECG database", Proc. SPIE 6510, Medical Imaging 2007: Physics of Medical Imaging, 65102Q (13 March 2007); https://doi.org/10.1117/12.705186

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