Multispectral optoacoustic tomography of lipid and hemoglobin contrast in human carotid atherosclerosis

Karlas A, Kallmayer M, Bariotakis M, Fasoula NA, Liapis E, Hyafil F, Pelisek J, Wildgruber M, Eckstein HH, Ntziachristos V (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Photoacoustics Elsevier

Book Volume: 23

Article Number: 100283

DOI: 10.1016/j.pacs.2021.100283

Abstract

Several imaging techniques aim at identifying features of carotid plaque instability but come with limitations, such as the use of contrast agents, long examination times and poor portability. Multispectral optoacoustic tomography (MSOT) employs light and sound to resolve lipid and hemoglobin content, both features associated with plaque instability, in a label-free, fast and highly portable way. Herein, 5 patients with carotid atherosclerosis, 5 healthy volunteers and 2 excised plaques, were scanned with handheld MSOT. Spectral unmixing allowed visualization of lipid and hemoglobin content within three ROIs: whole arterial cross-section, plaque and arterial lumen. Calculation of the fat-blood-ratio (FBR) value within the ROIs enabled the differentiation between patients and healthy volunteers (P = 0.001) and between plaque and lumen in patients (P = 0.04). Our results introduce MSOT as a tool for molecular imaging of human carotid atherosclerosis and open new possibilities for research and clinical assessment of carotid plaques.

Involved external institutions

Technische Universität München (TUM) DE Germany (DE) Université de Paris FR France (FR) Ludwig-Maximilians-Universität (LMU) DE Germany (DE)

How to cite

APA:

Karlas, A., Kallmayer, M., Bariotakis, M., Fasoula, N.-A., Liapis, E., Hyafil, F.,... Ntziachristos, V. (2021). Multispectral optoacoustic tomography of lipid and hemoglobin contrast in human carotid atherosclerosis. Photoacoustics, 23. https://doi.org/10.1016/j.pacs.2021.100283

MLA:

Karlas, Angelos, et al. "Multispectral optoacoustic tomography of lipid and hemoglobin contrast in human carotid atherosclerosis." Photoacoustics 23 (2021).

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