Oxygen saturation distribution detector and detection method thereof
A technology of saturation and degree distribution, applied in the optical field, can solve the problems of narrow range of oxygen saturation, low accuracy of oxygen saturation detection, inability to realize oxygen saturation detection, etc., and achieve consistent scale and high sensitivity of oxygen saturation The effect of distribution probing
Active Publication Date: 2019-12-24
NAT SPACE SCI CENT CAS +1
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[0006] The purpose of the present invention is to overcome the problems in the prior art that the detection accuracy of oxygen saturation in non-contact measurement is not high, the range of testing oxygen saturation is narrow, and the detection of oxygen saturation distribution cannot be realized, thereby providing a method based on compression Sensory Theory Oxygen Saturation Distribution Detector
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[0071] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0072] The oxygen saturation distribution detector of the present invention utilizes the principle of compressed sensing (Compressive Sensing, referred to as CS), which is a brand-new mathematical theory proposed by Donoho, Tao and Candès et al. The sampling method perfectly restores the original signal with fewer data samples (far below the limit of Nyquist / Shannon sampling theorem), and has higher robustness. Compressed sensing is mainly divided into three steps: compressed sampling, sparse transformation and algorithm reconstruction; among them, compressed sampling refers to the process of mapping and collecting the measured signal from high-dimensional to low-dimensional; the sparse transformation is to select the appropriate factor Ψ , so that the value x' obtained by changing x through Ψ is sparse, that is, x can be expressed sparsely u...
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Abstract
The invention discloses an oxygen saturation distribution detector, which comprises a data packet memory (10) and a random number generator (11), an incident light source imaging module, a light modulator, a reflected light spot intensity detection module, a control module (12) and a compressed sensing module (13); the light modulator is used for modulating an image formed by the incident light source imaging module and reflecting the image to the reflected light spot intensity detection module; the reflection light spot intensity detection module is used for detecting a number signal of the photon points reflected by the light modulator, and counting the number signal of the photon points to obtain a light intensity value; the control module (12) is used for generating a measurement matrix A and sending a random number instruction to the random number generator (11) according to the measurement matrix A to form a random matrix; and the compressed sensing module (13) is used for realizing oxygen saturation distribution signal reconstruction according to the light intensity value and the random matrix to obtain an oxygen saturation distribution diagram.
Description
technical field [0001] The invention relates to the field of optics, in particular to an oxygen saturation distribution detector and a method for detecting oxygen saturation distribution based on the detector. Background technique [0002] Oxygen saturation along with heart rate, respiratory rate, blood pressure and body temperature is an important physiological parameter. It is a relative measure of the amount of oxygen dissolved or carried in a given medium such as blood. It indicates whether a person has an adequate supply of oxygen and reflects the fitness level of the cardiorespiratory system. Continuous monitoring of oxygen saturation is important to detect hypoxemia in many medical situations, including anesthesia, sleep apnea, and childbirth. It is used in intensive care, operating room, emergency care, neonatal care, sleep studies and veterinary care. Mixed venous oxygen saturation SvO 2 , tissue oxygen saturation StO 2 and arterial oxygen saturation SaO 2 The...
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Login to View More IPC IPC(8): A61B5/1455
CPCA61B5/14551A61B5/7235
Inventor 姚旭日刘帅刘雪峰翟光杰赵清
Owner NAT SPACE SCI CENT CAS