Multiwavelength diffusion optical tomography system

Abstract

The invention relates to a multi-wavelength diffusion optical tomography system. The system comprises an optical acquisition module (110), which is used for generating an excitation light source and detecting tomography acquisition data according to the excitation light source; a switch module (120) electrically connected to the optical acquisition module (110) for controlling on / off of the excitation light source; a digital-to-analog conversion module (130) electrically connected to the optical acquisition module (110), configured to receive acquisition data of the optical acquisition module(110) and convert the data into digital signal data; a processor (140) electrically connected to the switch module (120) and the digital-to-analog conversion module (130) for controlling on / off of each switch in the switch module (120). The imaging system provided by the invention forms an optical acquisition module through a plurality of light emitting diodes and a plurality of detectors, improves the signal detection efficiency, saves the development cost of the imaging system, reduces the structural complexity, and further reduces the cost of the system.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and in particular relates to a multi-wavelength diffusion optical tomography system. Background technique [0002] Diffuse Optical Tomography (DOT) is a non-invasive, high-safety, and highly sensitive optical imaging method. Model, distribution map of optical absorption coefficient and scattering coefficient in three-dimensional space of tissue. [0003] At present, DOT imaging mainly has the following three imaging methods: steady state, frequency domain and time domain imaging methods. At present, the industry generally uses a photomultiplier tube (Photomultiplier Tube, PMT for short) as a detector, and a laser diode with modulation (Laser Diode, LD for short) as an excitation light source. After the beam comes out of the LD, it enters a 1×N optical switch to switch the excitation channel, and then transmits the beam to the surface of the experimental phantom or biological tissue thro...

AI Technical Summary

Problems solved by technology

[0004] In order to improve the imaging effect, the number of excitation and detection fibers required in the imaging system will increase, and the corresponding system will become more and more bulky, making the structure complexity of the traditional imaging system higher and higher; further, due to the numerical aperture of the optical fiber Limitation, using the detection fiber to receive the outgoing light signal will be lost, reducing the detection efficiency of the traditional imaging system

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