Single-shot time-folded fluorescence lifetime imaging.

Single-shot time-folded fluorescence lifetime imaging.
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DOI:
10.1073/pnas.2214617120
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发表时间:
2023-04-18
影响因子:
11.1
通讯作者:
Faccio, Daniele
Faccio, Daniele
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kapitany, Valentin;Zickus, Vytautas;Fatima, Areeba;Carles, Guillem;Faccio, Daniele

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本文介绍了一种单次激发荧光寿命成像(FLIM)方法。我们使用一个光学腔创建时间延迟和空间剪切复制的荧光衰减信号到一个时间选通的增强型电荷耦合器件(iCCD)。这种模式允许衰减信号的不同部分由单个相机并行采样,绕过扫描门的惯例。该技术在荧光珠和细胞上进行了实验验证。荧光寿命成像是生物成像中的重要工具,其允许人们检测细胞动力学及其环境中的细微变化。目前大多数时域方法涉及扫描样品上的单个照明点,这可能使成像动态场景具有挑战性,而单次拍摄“快速寿命确定”在寿命未被适当采样时可能会受到很大的不确定性。在这里,我们提出了一个时间折叠荧光寿命成像显微镜(TFFLIM)的方法,其中一个时间折叠腔提供了多个空间剪切的副本的寿命,每个转移相对于一个固定的时间门时间。这提供了一种稳健的单次FLIM方法,我们在荧光珠和铃兰样品的广泛寿命范围内进行了实验验证。
This paper describes a single-shot fluorescence lifetime imaging (FLIM) method. We use an optical cavity to create temporally delayed and spatially sheared replicas of the fluorescent decay signal onto a time-gated intensified charged-coupled device (iCCD). This modality allows different portions of the decay signal to be sampled in parallel by a single camera, bypassing the convention of scanning a gate. The technique is validated experimentally on fluorescent beads and cells. Fluorescence lifetime imaging is an important tool in bioimaging that allows one to detect subtle changes in cell dynamics and their environment. Most time-domain approaches currently involve scanning a single illumination point across the sample, which can make imaging dynamic scenes challenging, while single-shot “rapid lifetime determination” can suffer from large uncertainties when the lifetime is not appropriately sampled. Here, we propose a time-folded fluorescence lifetime imaging microscopy (TFFLIM) approach, whereby a time-folding cavity provides multiple spatially sheared replicas of the lifetime, each shifted temporally with respect to a fixed time gate. This provides a robust, single-shot FLIM approach that we experimentally validate across a broad lifetime range on fluorescent beads and Convallaria samples.
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