Apparatus and method for imaging examination of cells on surface of living tissue using moxifloxacin

Patent metadata

Field	Value
Publication number	US-12320732-B2
Application number	US-202217582018-A
Country	US
Kind code	B2
Filing date	Jan 24, 2022
Priority date	Oct 26, 2021
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

An apparatus for imaging examination of cells on a surface of living tissue using moxifloxacin. includes: a light source emitting light towards living tissue stained with moxifloxacin; a photographing unit photographing the living tissue subjected to fluorescence excitation by the light emitted from the light source; a lens unit controlling the light emitted from the light source or a fluorescence path of moxifloxacin excited by the light; an objective lens controlling a focus of the photographing unit; an active lens disposed between the objective lens and the photographing unit and changing a focal position on the living tissue; and an image generator performing image processing of a cell image of the living tissue photographed by the photographing unit to generate an in-focus image, in which the entirety of the cell image is in focus.

First claim

What is claimed is:

1. An apparatus for imaging examination of cells of living tissue stained with moxifloxacin, comprising:
a light source emitting light towards the living tissue;
a single photographing unit photographing the living tissue subjected to fluorescence excitation by the light emitted from the light source;
a lens unit controlling a path of the light emitted from the light source or a path of fluorescence light emitted from moxifloxacin excited by the light;
an objective lens controlling a focus of the photographing unit;
an active lens disposed between the objective lens and the photographing unit, wherein the active lens is composed of one selected from
a deformable mirror having multiple actuators attached to regions of a thin and bendable mirror surface and individually driven to adjust regions of the mirror reflecting the florescence light to have different heights from one another, wherein the deformable mirror changes a shape of the deformable mirror from a planar neutral state to convex or concave lens shapes of the deformable mirror to change a focal position on the living tissue at least 30 times during a single camera exposure session of 10 to 30 ms, and
an electrically tunable lens having a shape realized by adopting a liquid that changes into convex or concave lens shapes of the electrically tunable lens upon application of a predetermined electric current thereto, wherein the electrically tunable lens continuously changes from the convex lens shape to the concave lens shape to change the focal position on the living tissue during the single camera exposure session of 10 to 30 ms

an image generator performing image processing of a cell image of the living tissue photographed by the photographing unit to generate a two-dimensional in-focus image, in which the entirety of the cell image is in focus,
wherein the photographed cell image includes out-of-focus data overlapping with the in-focus data, resulting in a high background signal due to accumulation of a point spread function upon focusing-in and focusing-out,
wherein the image generator generates the two-dimensional in-focus image by removing influence of the point spread function using a deconvolution image processing method, thereby enabling to observe the living tissue in an in-focus state over the entirety of the cell image.

2. A method for imaging examination of cells of living tissue stained with moxifloxacin, comprising:
an irradiation step in which a light source emits light towards the living tissue;
a photographing step in which a single photographing unit photographs the living tissue subjected to fluorescence excitation by the light emitted from the light source, the photographing step comprising:
a photographing start step in which the single photographing unit starts to photograph the living tissue;
a focal position changing step in which an active lens disposed between an objective lens and the single photographing unit changes a focal position on the living tissue; and
a photographing finish step in which the single photographing unit finishes photographing; and

an image generation step in which a cell image of the living tissue photographed by the single photographing unit is subjected to image processing to generate a two-dimensional in-focus image, in which the entirety of the cell image is in focus,
wherein, in the focal position changing step, the active lens is composed of one selected from
a deformable mirror having triple actuators attached to regions of a thin and bendable mirror surface and individually driven to adjust the regions of the mirror reflecting the fluorescence light to have different heights from one another, wherein the deformable mirror changes a shape of the deformable mirror from a planar neutral state to convex or concave lens shapes to change the focal position on the living tissue at least 30 times during a single camera exposure session of 10 to 30 ms, and
an electrically tunable lens having a shape realized by adopting a liquid that changes into convex or concave lens shapes of the electrically tunable lens upon application of a predetermined electric current thereto, wherein the electrically tunable lens continuously changes from the convex lens shape to the concave lens shape to change the focal position on the living tissue during the single camera exposure session of 10 to 30 ms,

wherein the photographed cell image includes out-of-focus data overlapping with the in-focus data, resulting in a high background signal due to accumulation of a point spread function upon focusing-in and focusing-out,
wherein the image generation step generates the two-dimensional in-focus image by removing influence of the point spread function using a deconvolution image processing method, thereby enabling to observe the living tissue in an in-focus state over the entirety of the cell image.

Assignees

• Postech Res & Business Dev Found
• Seoul Nat Univ Hospital
• Univ Industry Foundation Yonsei Univ Wonju Campus

Inventors

• Kim Ki Hean
• Lee Jung Bin
• Kim Seong Han
• Yoon Chang Ho
• Yang Sejung

Classifications

• G06T2207/10004

  Still image; Photographic image · CPC title

• G06T2207/10056

  Microscopic image · CPC title

• G06T2207/10064

  Fluorescence image · CPC title

• G06T2207/30024

  Cell structures in vitro; Tissue sections in vitro · CPC title

• G01N2001/302

  Stain compositions · CPC title