Dr. Bo Tao Profile

Dr. Bo Tao

at Chinese PLA General Hospital

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Proceedings Article | 8 March 2019 Paper

Identification of angiogenesis and viable myocardium using hybrid cardiac imaging

Zhenzhen Xu, Bo Tao, Shenghan Ren, Feng Cao, Jimin Liang

Proceedings Volume 10951, 1095128 (2019) https://doi.org/10.1117/12.2512653

KEYWORDS: Image segmentation, Image fusion, Image registration, Heart, Single photon emission computed tomography, Positron emission tomography, Computed tomography, Cardiac imaging, Arteries, Image processing

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The existing hybrid cardiac imaging approaches focus on predicting the adverse cardiac events or disease diagnosis, yet do not offer any insight into the pathological advance in the repair process. Angiogenesis is one of the most important mechanism in the repair process after ischemic injury and has shown benefit to the prognosis of occlusive cardiovascular disorders, thus becomes a target of molecular therapies. In vivo monitoring of angiogenesis and comprehensive evaluation of cardiac function associated with angiogenesis are urgently needed in both research and clinical practice. In this paper, a multimodality image fusion strategy was proposed for angiogenesis and viable myocardium identification. Imaging approaches including coronary computed tomography angiography(CCTA), 2-deoxy-2-[¹⁸F]fluoro-D-glucose ([¹⁸F]DG) PET/CT, [⁶⁸Ga]-1,4,7-triazacyclononane-1,4,7-triacetic acid-(Arg-Gly-Asp)2 ([⁶⁸Ga]-NOTA-PRGD2) PET/CT and ^99mTc-sestamibi (^99mTc-MIBI) myocardial perfusion SPECT/CT scanning were performed to acquire both anatomy and three kinds of function information. All of these modality images were then fused by an automatic strategy consisting of ROI segmentation and cross modality registration. The left ventricle myocardium was categorized into 4 groups based on fusion result according to the respective relative tracer uptake. The final results intuitively reflected the extent of the [¹⁸F]DG and ^99mTc-MIBI uptake defect, the perfusion-metabolism mismatch area, as well as the location of the [⁶⁸Ga]-NOTA-PRGD2 signal. The hybrid CCTA-PET-SPECT image verified the occurrence of angiogenesis based on the in vivo noninvasive molecular imaging approaches and visualized the hibernating myocardium. The presented fusion strategy is helpful in facilitating the study of the relationship between viability, perfusion and blocked coronary arteries, as well as angiogenesis.

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