Rotary diffusion optical imaging system

Abstract

The invention discloses a rotary diffusion optical imaging system. The system comprises a light source unit, a detection unit, a bearing device with an imaging cavity, a rotatable sleeve device and adata acquisition unit, the light source unit comprises a plurality of light-emitting light sources, the detection unit comprises a plurality of detectors, the sleeve device comprises a sleeve, N rowsand M columns of through holes are formed in the sleeve, one light-emitting light source is correspondingly arranged in each through hole in the mth column, one detector is correspondingly arranged ineach through hole in columns except the mth column, and the sleeve sleeves the imaging cavity. According to the rotary diffusion optical imaging system provided by the invention, an optical fiber isno longer used for optical conduction, excitation and receiving are realized by adopting a mode that the light sources and the detectors are tightly attached to the measured object, the system complexity and the system cost are greatly reduced, meanwhile, the consistency of all channels and the signal to noise ratio of collected signals are improved, data collection and reconstruction are achieved, so that DOT imaging can be further studied, and the technology can be conveniently applied to mammary gland imaging.

Description

technical field [0001] The invention belongs to the field of imaging technology, and in particular relates to a rotary diffuse optical imaging system. Background technique [0002] Diffuse Optical Tomography (DOT) is specific, dynamic, and sensitive to changes in tissue function, and it also has the advantages of safety, reliability, and low cost. Therefore, near-infrared diffuse optical tomography has wide application potential and research value. At present, the main applications of DOT technology are brain functional imaging and breast imaging. For breast imaging, when the tissue becomes cancerous, due to the enrichment of blood vessels and the high level of cell metabolism, the area presents the characteristics of rich blood and hypoxia, resulting in a stronger absorption of light in this area compared with normal tissue, so , DOT technology can use the imaging of hemoglobin, water, lipids and other endogenous substances in the mammary gland to obtain the difference in...

AI Technical Summary

Problems solved by technology

[0004] However, the structure of this system is too complicated. The light generated by the light source needs to pass through optical fibers, attenuators, and collimators to reach the imaging cavity. At the same time, the outgoing light signal also needs to pass through optical fibers, optical switches, collimators, and filter wheels to reach the detection chamber. device

In the whole process, the light passes through multiple devices, and it is inevitable that there will be a large loss of light

In addition, due to the large number of system components, it is inevitable that the system stability will be poor.

In addition, the system uses PMT as the photodetector device, which is expensive and requires strict light-proof conditions.

In addition, because the system uses a single PMT for data reception, although the system cost can be reduced, it also increases the data collection time and reduces the system efficiency.

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