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Rapid NIR optical tomography at 35 frames per second by spectrally-encoded parallel light delivery

机译:通过光谱编码的平行光传输每秒在35帧中快速裸射光学断层扫描

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NIR tomography has advanced considerably over the past decade. The historical developments which have led to creation of NIR tomography have largely resulted in systems which were optimized for signal accuracy and high numbers of point measurements, rather than speed of acquisition. One of the key technological designs limiting the acquisition speed is the requirement that the source light be delivered sequentially or through frequency encoding of the time signal. The approach presented here provides a method to introduce all sources and all detectors simultaneously with no moving parts and retaining the dynamic range of the detector, by separating the signals spatially prior to detection. This is achieved by spectral wavelength encoding of the sources, which allows many sources to be input into the tissue at the same time, followed by spectral-decoding of all detection channels in parallel using a spectrometer and CCD detector. A data acquisition speed of 35Hz frame rate has been achieved with this configuration. The described system features 8 sources at an overall 785nm center band and 8 detectors evenly deployed in a 27mm array designed for imaging with small animal tissues. This paper discusses the design, instrumentation of the system, and the imaging characteristics.
机译:在过去的十年中,NIR断层扫描已经提升了。导致创建NIR断层扫描的历史发展主要导致系统针对信号精度和大量点测量而不是采集速度进行了优化。限制采集速度的关键技术设计之一是要求顺序地或通过时间信号的频率编码传送源光。呈现的方法提供了一种方法,通过在检测前在空间上分离时,将所有源和所有源和所有探测器一起引入所有源和所有探测器,并保持检测器的动态范围。这是通过源的光谱波长编码实现的,这允许许多源同时输入组织,然后使用光谱仪和CCD检测器并行地对所有检测通道进行光谱解码。通过这种配置实现了35Hz帧速率的数据采集速度。所描述的系统在整个785nm中心带的8个源处,8个探测器均匀部署在27mm阵列中,设计用于与小动物组织成像。本文讨论了系统的设计,仪器和成像特性。

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