Near-infrared three-dimensional dynamic imager system based on single photon counter

Abstract

The invention discloses a near-infrared three-dimensional dynamic imager system based on a single photon counter. The near-infrared three-dimensional dynamic imager system based on the single photon counter is used for detecting a living body and comprises a light source, a light switcher, a detector and a controller. The light source generates long associated laser with different wavelengths. One end of the light switcher is connected with the light source in an optical mode, the other end of the light switcher is connected with a multimode optical fiber in an optical mode, and the light switcher comprises a wavelength switcher and a location switcher. The detector is composed of a plurality of single photon counting units. The controller is electrically connected with the light source, the light switcher and the detector and is used for controlling the light source according to a working mode to generate the corresponding long associated laser and controlling the detector to collect corresponding data. According to the near-infrared three-dimensional dynamic imager system based on the single photon counter, precision of data collection is effectively improved, and cost of a device is reduced.

Description

technical field [0001] The invention relates to near-infrared light imaging, in particular to a near-infrared three-dimensional dynamic imager system based on a single photon counter. Background technique [0002] Near-infrared light (600-1000nm) has the unique advantage of detecting the content and flow of hemoglobin, fat, water and other molecules without damage. At present, there are two main types of imaging systems using near-infrared light: the first is the hemoglobin content imager, Reconstruct the spatial distribution of oxygenated hemoglobin, deoxygenated hemoglobin, water and fat, which can be used to estimate the metabolism of tumors or other tissues, and can be used to track the effect of chemotherapy; the second is a blood flow imager , can measure the distribution of blood flow on the surface of the body or brain, diagnose poor local blood circulation, and detect brain function. Oxygen blood flow imaging has irreplaceable advantages for tumor treatment trackin...

AI Technical Summary

Problems solved by technology

[0010] (1) Optical fiber is used for signal transmission, and mobile APD / PMT is used for data acquisition, but the instrument becomes bulky and fragile due to the existence of high-voltage cables, and the jitter of optical fiber will cause very large measurement errors

[0011] (2) APD / PMT and spectroscopic devices are used to obtain multiple data points, which cancels scanning, but increases light loss and instrument cost

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