An infrared image sequence-based sleep quality evaluation system and method. The method comprises: obtaining a plurality of respiratory infrared image sequences to be evaluated, one respiratory infrared image sequence comprising a plurality of respiratory infrared image frames to be evaluated; performing sleep quality evaluation on each respiratory infrared image sequence in the plurality of respiratory infrared image sequences by means of a classifier to obtain a sleep quality evaluation result corresponding to each respiratory infrared image sequence; and counting the number of different sleep quality evaluation results according to the sleep quality evaluation results respectively corresponding to the plurality of respiratory infrared image sequences, and determining the sleep quality evaluation result with the largest number as a sleep quality evaluation result of a user. Contactless sleep monitoring can be carried out on a user, monitoring costs are reduced at the same time, and evaluation accuracy of sleep quality is improved.

A method for obtaining a near-infrared spectroscopy (fNIRS) cerebral signal in a subject includes: placing a near-infrared emitter and respective proximal and distal near-infrared detectors on a skin of a head of a subject; during a baseline recording stage with the subject in resting-state, record near-infrared signals, the recorded signals including a baseline deep-signal and a baseline shallow-signal; calculate a scaling factor between amplitudes of the baseline deep-signal and the baseline shallow-signal at a given task-frequency; with the subject undergoing a cyclic cerebral stimulation at the task-frequency during a stimulation recording stage, record near-infrared signals, the recorded signals comprising a shallow-signal and a deep-signal; and applying the scaling factor to the shallow-signal, calculating the cerebral signal at the task-frequency as a difference between the deep-signal and the scaled shallow-signal, at the task-frequency.

Embodiments herein relate to devices and methods for measuring cardiogenic airway modulations using optical sensing. In an embodiment, an optical cardiogenic modulation monitoring device can be included having an optical emitter configured to emit light at a first wavelength and an optical detector configured to detect incident light. The monitoring device can be configured so that light emitted from the optical emitter propagates through lung tissue. The monitoring device can also be configured to use detected incident light to measure cardiogenic oscillations of the lung tissue. Other embodiments are also included herein.

A first optical measurement of tissue with a first optical device is initiated. The first optical measurement includes a first shallow optical reading and a first deeper optical reading. A second optical measurement of the tissue with a second optical device spaced is initiated. The second optical device is spaced apart from the first optical device. The second optical measurement includes a second shallow optical reading and a second deeper optical reading. A first difference value between the first shallow optical reading and the first deeper optical reading is determined. A second difference value between the second shallow optical reading and the second deeper optical reading is determined. A large vessel occlusion (LVO) alert is generated when a ratio of the first difference value to the second difference value is larger than a threshold value.

The present invention relates to a parathyroid sensing system, and includes: a modulator for generating a modulation signal having a predetermined frequency; a lock-in amplifier and a light source which receive information on the modulation signal; an excitation filter for transmitting, among light emitted from the light source, only excitation light that excites parathyroid glands; an emission filter connected to a probe and selectively transmitting only fluorescence emitted from the parathyroid glands; a near-infrared sensor for sensing the autofluorescence that has passed through the emission filter, and converting the sensed autofluorescence into an electric signal; and a speaker for generating an alarm through the electric signal. Through the present invention, the locations of the parathyroid glands may be precisely identified even when lights are turned on in an operating room, and convenience may be provided by alerting a surgeon by means of an alarm when the parathyroid glands are detected. In addition, the locations of the parathyroid glands may be precisely detected, even when the probe is not directly in contact with the parathyroid glands, by using the autofluorescence characteristics of the parathyroid glands.

For patient weight estimation in a medical imaging system, a patient model, such as a mesh, is fit to a depth image. One or more feature values are extracted from the fit patient model, reducing the noise and clutter in the values. The weight estimation is regressed from the extracted features.

An adjustable illuminator for photodynamically diagnosing or treating a surface includes a plurality of first panels and at least one second panel. The plurality of first panels have wider widths and the at least one second panel has a narrower width. The narrower width is less than the wider widths. The illuminator further includes a plurality of light sources, each mounted to one of the plurality of first panels or the at least one second panel and configured to irradiate the surface with substantially uniform intensity visible light. The plurality of first panels and the at least one second panel are rotatably connected. The at least one second panel is connected on each side to one of the plurality of first panels. The second panel acts as a “lighted hinge” to reduce or eliminate optical dead spaces between adjacent panels when the illuminator is bent into a certain configuration.

An optical source sweeps a source light over an optical wavelength range. An interferometer splits the source light into sample light and reference light, delivers the sample light into an anatomical structure, such that the sample light is scattered by the anatomical structure, resulting in physiological-encoded signal light that exits the anatomical structure, and combines the signal light and the reference light into an interference light pattern having an array of spatial components and a plurality of oscillation frequency components. An optical detector array detects intensity values of the array of spatial components. A processor derives an array of intensity values of each oscillation frequency component from the detected spatial component intensity value array, reduces each derived oscillation frequency component intensity value array to a single frequency component intensity value, and determines a depth of a physiological event in the anatomical structure based on the reduced frequency component intensity values.

An electromagnetic (EM) probe for monitoring one or more biological tissues. The EM probe comprises a cup shaped cavity having an opening and an interior volume, a circumferential flange formed substantially around the cup shaped cavity, in proximity to the opening, at least one layer of a material, for absorbing electromagnetic radiation, applied over at least one of a portion of the circumferential flange and a portion of the outer surface of the cup shaped cavity, and at least one EM radiation element which performs at least one of emitting and capturing EM radiation via the interior volume.

Provided are an apparatus and method for measuring bio-information. The apparatus for measuring bio-information includes: a pulse wave sensor configured to emit light of multiple wavelengths onto an object, and detect the light to obtain multi-wavelength pulse wave signals when the light is reflected or scattered from the object; and a processor configured to: obtain a conversion signal that indicates a contact pressure between the object and the pulse wave sensor, based on the multi-wavelength pulse wave signals, obtain an oscillometric envelope based on the multi-wavelength pulse wave signals and the conversion signal, and obtain bio-information based on the oscillometric envelope.