Imaging device and method

Patent metadata

Field	Value
Publication number	US-2018024343-A1
Application number	US-201515539320-A
Country	US
Kind code	A1
Filing date	Dec 16, 2015
Priority date	Dec 24, 2014
Publication date	Jan 25, 2018
Grant date	—

Abstract

Disclosed is an imaging device including a light source arranged so as to generate an optical signal, an optical support coupled to the light source and arranged so as to project a luminous excitation signal with a substantially constant light intensity, from the light source to a body to be observed during the use of the device, and an asynchronous camera coupled to the optical support and designed so as to generate a signal including, for each pixel of a first pixel matrix, a signal sequence representing asynchronous events corresponding to variations of the light backscattered by the body to be observed for the pixel.

First claim

1 - 10 . (canceled)

11 . An imaging device comprising:
at least one light source arranged so as to generate an optical signal; an optical support coupled to the light source and arranged so as to project a luminous excitation signal with a substantially constant light intensity from the light source to a body to be observed when using the device; and a first asynchronous camera coupled to the optical support and designed so as to generate a signal comprising, for each pixel of a first pixel array, a signal sequence representing asynchronous events corresponding to variations in the light backscattered by the body to be observed for the pixel.

12 . The device according to claim 11 , comprising a second asynchronous camera coupled to the optical support and designed so as to generate a signal comprising, for each pixel of a second pixel array, a signal sequence representing asynchronous events corresponding to variations in the light backscattered by the body to be observed for the pixel, and wherein a first optical filter is arranged so as to filter the backscattered light captured by the first asynchronous camera.

13 . The device according to claim 12 , wherein a second optical filter is arranged so as to filter the backscattered light captured by the second asynchronous camera.

14 . The device according to claim 13 , comprising a third asynchronous camera coupled to the optical support and designed so as to generate a signal comprising, for each pixel of a third pixel array, a signal sequence representing asynchronous events corresponding to variations in the light backscattered by the body to be observed for the pixel, and wherein a third optical filter is arranged so as to filter the backscattered light captured by the third asynchronous camera.

15 . The device according to claim 11 , wherein the light source is a light-emitting diode or a laser source.

6 . The device according to claim 11 , comprising a plurality of light sources arranged on the optical support so as to generate luminous excitation signals with substantially constant respective light intensities.

17 . Device according to claim 16 , wherein the light sources are also arranged on the optical support such that they form a luminous ring.

18 . The device according to claim 11 , wherein the asynchronous camera is arranged on the support located above an area not illuminated by the light source.

19 . A microcirculation imaging system comprising an imaging device comprising:
at least one light source arranged so as to generate an optical signal; an optical support coupled to the light source and arranged so as to project a luminous excitation signal with a substantially constant light intensity from the light source to a body to be observed when using the device; and a first asynchronous camera coupled to the optical support and designed so as to generate a signal comprising, for each pixel of a first pixel array, a signal sequence representing asynchronous events corresponding to variations in the light backscattered by the body to be observed for the pixel.

20 . An imaging method comprising:
generating an optical signal; projecting a luminous excitation signal with a substantially constant light intensity from the optical signal to a body to be observed; and generating a signal comprising, for each pixel of a first pixel array, a signal sequence representing asynchronous events corresponding to variations in the light backscattered by the body to be observed for the pixel.

Assignees

• Univ Pierre Et Marie Curie Paris 6
• Centre National De La Recherche Scient - Cnrs
• Iserm (Institut National De La Sante Et La Rech Medicale)
• Univ Paris-Sud
• Assist Publique-Hopitaux De Paris - Aphp

Inventors

• Chenegros Guillaume
• Benosman Ryad
• Libert Nicolas
• Durenteau Jacques
• Harrois Anatole
• Picaud Serge
• Sahel Jose-Alain

Classifications

• G01N2021/4709

  Backscatter · CPC title

• A61B5/7285

  for synchronizing or triggering a physiological measurement or image acquisition with a physiological event or waveform, e.g. an ECG signal · CPC title

• G02B21/06

  Means for illuminating specimens · CPC title

• G02B21/361 Primary

  Optical details, e.g. image relay to the camera or image sensor (G02B21/364 takes precedence; illumination details G02B21/06 and subgroups) · CPC title

• A61B5/14556

  by fluorescence (A61B5/14555 takes precedence) · CPC title