Other

Christie Digital Systems Usa, Inc.

Robert Andre Amelard

Alexander Sheung Lai Wong

Robert Benjamin Wagner

Sina Zarei Mahmoodabadi

David Priest

Gopal Valsan

There is disclosed a system and method for measuring arterial and venous blood pulse waveforms (BPWs) of a subject utilizing photoplethysmography (PPG). In an embodiment, the system and method comprises: providing a plurality of virtual sensors positioned to cover a desired field-of-view of the subject, each virtual sensor adapted to detect and measure a BPW signal from an area of the subject's body and provide a BPW signal output; processing the BPW signal outputs of the plurality of virtual sensors to compare the BPWs at multiple areas of the subject's body to perform spatial perfusion analysis; and displaying at least one aggregate output based on the spatial perfusion analysis. At least one aggregate output may include a visualization of one or more perfusion patterns overlaid on a photographic image of the subject, and aggregate statistics including subject heart rate and breathing rate. The system and method may use a signal from one of the virtual sensors as a reference waveform for cardiovascular monitoring in the generation of parametric maps for assessing BPW characteristics at various parts of the body simultaneously. The system and method may also include a contact photoplethysmography (PPG) sensor, which is connected to the DSP and provides a BPW as a reference waveform for improved cardiovascular monitoring in the generation of parametric maps for assessing BPW characteristics at various parts of the body simultaneously.

System and method for spatial cardiovascular monitoring

A multispectral medical imaging device includes illumination devices arranged to illuminate target tissue. The illumination devices emit light of different near-infrared wavelength bands. The device further includes an objective lens, a near-infrared image sensor positioned to capture image frames reflected from the target tissue, and a visible-light image sensor positioned to capture image frames reflected from the target tissue. A processor is configured to modulate near-infrared light output of the plurality of illumination devices to illuminate the target tissue. The processor is further configured to determine reflectance intensities from the image frames captured by the near-infrared image sensor and to generate a dynamic tissue oxygen saturation map of the target tissue using the reflectance intensities. The device further includes an output device connected to the processor for displaying the dynamic tissue oxygen saturation map.

Multispectral medical imaging devices and methods thereof

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Waterloo, Canada

Robert Andre Amelard