Abstract
Atherosclerosis is one of the major causes of morbidity and mortality in developed countries. Early detection of plaque lesions is the first and most necessary step towards preventing the lethal consequences of atherosclerosis. Currently, many biomedical imaging techniques aimed at imaging and assessing vulnerable plaques have been reported in literature. Unfortunately, atherosclerosis is often asymptomatic, as vulnerable plaques grow without causing any detrimental side effects until rupturing. Due to this complication, the information provided by a single clinical arterial imaging technique is often insufficient to diagnose vulnerable plaque formation at an early stage. Therefore, an optimal imaging modality for diagnosis and characterization of plaques should combine high spatial resolution capable of resolving fibrous cap thickness, deep imaging depth capable of assessing plaque burden and vessel remodeling, and molecular sensitivity capable of determining tissue composition and mechanical properties.
This chapter describes several multimodality intravascular imaging systems that integrate intravascular OCT with ultrasound (US), fluorescence, and elastography. The integrated multimodality intravascular imaging system can measure vascular tissue with high imaging resolution and deep imaging depth, chemical composition, and tissue mechanical properties simultaneously. The system will provide an interventional cardiologist with a critically important tool for detecting and characterizing vulnerable plaques, monitoring the progression of disease, and evaluating the efficacy of intervention. The surveillance and early diagnosis of vulnerable lesions will prove to be of the utmost importance in further efforts to tailor therapeutic interventions towards patients at risk. Several multimodality intravascular imaging systems, including intravascular OCT/US, OCT/fluorescence, and OCT/phase resolved acoustic radiation force optical coherence elastography will be discussed.
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Acknowledgments
I would like to thank many of our colleagues who have contributed to the intravascular imaging project at UCI Beckman Laser Institute, Department of Medicine Cardiology Division, and Department of Biomedical Engineering, particularly the students and postdoctoral fellows. In addition, I would like to thank my collaborators, Drs. Qifa Zhou and K. Kirk Shung, as well as their students at USC NIH Ultrasonic Transducer Resource Center and Department of Biomedical Engineering, for joint development of miniature ultrasound transducers for the intravascular imaging project. Finally, I also want to acknowledge grants support from the National Institutes of Health (R01EB-10090, R01EY-021529, R01HL-105215, R01HL-125084, and P41EB-015890), Air Force Office of Scientific Research (FA9550-04-0101), and the Beckman Laser Institute Endowment.
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Chen, Z. (2015). Development of Integrated Multimodality Intravascular Imaging System for Assessing and Characterizing Atherosclerosis. In: Drexler, W., Fujimoto, J. (eds) Optical Coherence Tomography. Springer, Cham. https://doi.org/10.1007/978-3-319-06419-2_73
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