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用于组织快速宏观表征的双激发光谱自体荧光寿命与反射率成像。

Dual excitation spectral autofluorescence lifetime and reflectance imaging for fast macroscopic characterization of tissues.

作者信息

Herrando Alberto I, Castillo-Martin Mireia, Galzerano Antonio, Fernández Laura, Vieira Pedro, Azevedo José, Parvaiz Amjad, Cicchi Riccardo, Shcheslavskiy Vladislav I, Silva Pedro G, Lagarto João L

机构信息

Biophotonics Platform, Champalimaud Foundation, Avenida Brasilia, 1400-038 Lisbon, Portugal.

Digestive Unit, Champalimaud Foundation, Avenida Brasilia, 1400-038 Lisbon, Portugal.

出版信息

Biomed Opt Express. 2024 May 1;15(6):3507-3522. doi: 10.1364/BOE.505220. eCollection 2024 Jun 1.

Abstract

Advancements in optical imaging techniques have revolutionized the field of biomedical research, allowing for the comprehensive characterization of tissues and their underlying biological processes. Yet, there is still a lack of tools to provide quantitative and objective characterization of tissues that can aid clinical assessment in vivo to enhance diagnostic and therapeutic interventions. Here, we present a clinically viable fiber-based imaging system combining time-resolved spectrofluorimetry and reflectance spectroscopy to achieve fast multiparametric macroscopic characterization of tissues. An essential feature of the setup is its ability to perform dual wavelength excitation in combination with recording time-resolved fluorescence data in several spectral intervals. Initial validation of this bimodal system was carried out in freshly resected human colorectal cancer specimens, where we demonstrated the ability of the system to differentiate normal from malignant tissues based on their autofluorescence and reflectance properties. To further highlight the complementarity of autofluorescence and reflectance measurements and demonstrate viability in a clinically relevant scenario, we also collected in vivo data from the skin of a volunteer. Altogether, integration of these modalities in a single platform can offer multidimensional characterization of tissues, thus facilitating a deeper understanding of biological processes and potentially advancing diagnostic and therapeutic approaches in various medical applications.

摘要

光学成像技术的进步彻底改变了生物医学研究领域,使得对组织及其潜在生物学过程进行全面表征成为可能。然而,仍然缺乏能够对组织进行定量和客观表征的工具,这些工具可辅助体内临床评估,以加强诊断和治疗干预。在此,我们展示了一种基于光纤的临床可行成像系统,该系统结合了时间分辨荧光光谱法和反射光谱法,以实现对组织的快速多参数宏观表征。该装置的一个基本特征是能够进行双波长激发,并结合在几个光谱区间记录时间分辨荧光数据。在新鲜切除的人类结肠直肠癌标本中对这个双峰系统进行了初步验证,我们在其中展示了该系统基于组织的自发荧光和反射特性区分正常组织与恶性组织的能力。为了进一步突出自发荧光和反射测量的互补性,并证明在临床相关场景中的可行性,我们还从一名志愿者的皮肤收集了体内数据。总之,将这些模式整合到一个单一平台可以提供组织的多维表征,从而有助于更深入地理解生物学过程,并可能推动各种医学应用中的诊断和治疗方法的发展。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9eaf/11166421/5ef14d1bb952/boe-15-6-3507-g001.jpg

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