Method, system, apparatus, and computer program for 3D acquisition and caries detection

Patent metadata

Field	Value
Publication number	US-9860520-B2
Application number	US-201313948665-A
Country	US
Kind code	B2
Filing date	Jul 23, 2013
Priority date	Jul 23, 2013
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A system and apparatus for obtaining images of an object, a method for operating an optical camera system to obtain images of the object, and a computer program that operates in accordance with the method. The system includes an optical system and at least one processing system. The optical system is arranged to capture at least one first image of the object while the optical system operates in an imaging mode, and is also arranged to capture at least one second image of the object while the optical system operates in a diagnostic mode. The at least one processing system is arranged to combine the first and second images.

First claim

What is claimed is:

1. A dental imaging system, comprising:
a housing;
an optical system that includes:
at least one optical source,
an imaging sensor,
a prism configured to deviate a light beam emitted by the at least one optical source onto an object and deviate light backscattered by the object onto the imaging sensor, wherein a path of the light beam, from the optical source to the object, defines a projection optical path and a path of the light backscattered by the object, from the object to the imaging sensor, defines an observation optical path, and
a grating configured to move between a first position, where the grating is in the projection optical path, and a second position, where the grating is not in the projection optical path,
wherein the at least one optical source and the imaging sensor are contained within the housing, and
wherein the optical system is configured to produce three-dimensional image data of an object using the imaging sensor while the optical system operates in an imaging mode, and is further configured to produce caries detection data of the object using the imaging sensor while the optical system operates in a diagnostic mode; and

at least one processing system arranged to combine the three-dimensional image data and the caries detection data into a diagnostic rendering,
wherein the grating is disposed at the first position in the imaging mode and at the second position in the diagnostic mode.

2. A system according to claim 1 , wherein the optical system operates in the imaging mode and the diagnostic mode non-simultaneously.

3. A system according to claim 1 , wherein the optical system is operable to select at least one of the imaging mode and the diagnostic mode.

4. A system according to claim 1 , wherein an integration time of the imaging sensor during the diagnostic mode is increased relative to the imaging mode.

5. A system according to claim 1 ,
wherein the optical system performs three-dimensional imaging by phase-shift triangulation while operating in the imaging mode, and performs transillumination imaging while operating in the diagnostic mode.

6. A system according to claim 1 , wherein the optical system is a self-contained camera.

7. A method for operating a dental imaging system, the method comprising:
producing in an imaging mode of the dental imaging system three-dimensional image data of an object using an imaging sensor;
producing in a diagnostic mode of the dental imaging system caries detection data of the object using the imaging sensor; and
combining the three-dimensional image data and the caries detection data into a diagnostic rendering,
wherein the dental imaging system comprises an optical system that comprises:
at least one optical source,
the imaging sensor,
a prism configured to deviate a light beam emitted by the at least one optical source onto the object and deviate light backscattered by the object onto the imaging sensor, wherein a path of the light beam, from the optical source to the object, defines a projection optical path and a path of the light backscattered by the object, from the object to the imaging sensor, defines an observation optical path, and
a grating configured to move between a first position, where the grating is in the projection optical path, and a second position, where the grating is not in the projection optical path, and

wherein the grating is disposed at the first position in the imaging mode and at the second position in the diagnostic mode.

8. A method according to claim 7 , wherein the producing in the imaging mode and the producing in the diagnostic mode occur non-simultaneously.

9. A method according to claim 7 , wherein the producings are selectable.

10. A method according to claim 7 , wherein the producing in the imaging mode includes performing three-dimensional imaging by phase-shift triangulation, and the producing in the diagnostic mode includes performing transillumination imaging.

11. A method according to claim 7 , wherein the dental imaging system is a self-contained camera.

12. A method according to claim 7 , wherein an integration time of the imaging sensor during the diagnostic mode is increased relative to the imaging mode.

13. A non-transitory computer-readable medium having instructions stored thereon which, when executed, cause a dental imaging system, that comprises an optical system that comprises:
at least one optical source,
an imaging sensor,
a prism configured to deviate a light beam emitted by the at least one optical source onto an object and deviate light backscattered by the object onto the imaging sensor, wherein a path of the light beam, from the optical source to the object, defines a projection optical path and a path of the light backscattered by the object, from the object to the imaging sensor, defines an observation optical path, and
a grating configured to move between a first position, where the grating is in the projection optical path, and a second position, where the grating is not in the projection optical path, to perform a procedure comprising:

producing in an imaging mode of the dental imaging system three-dimensional image data of an object using the imaging sensor,
producing in a diagnostic mode of the dental imaging system caries detection data of the object using the imaging sensor, and
combining the three-dimensional image data and the caries detection data into a diagnostic rendering,
wherein the grating is disposed at the first position in the imaging mode and at the second position in the diagnostic mode.

14. The program according to claim 13 , wherein the combining includes mapping the caries detection data onto the three-dimensional image data.

Assignees

• Michaeli Daniel
• Thiel Frank
• Sirona Dental Systems Gmbh

Inventors

• Michaeli Daniel
• Thiel Frank

Classifications

• G02B21/0028

  specially adapted for specific applications, e.g. for endoscopes, ophthalmoscopes, attachments to conventional microscopes · CPC title

• G01B11/25

  by projecting a pattern, e.g. {one or more lines,} moiré fringes on the object (G01B11/255 takes precedence {; image analysis for depth or shape recovery G06T7/50}) · CPC title

• A61B5/0068

  Confocal scanning · CPC title

• G01B11/245

  using a plurality of fixed, simultaneously operating transducers ({G01B11/2408 - G01B11/2425, } G01B11/255 take precedence) · CPC title

• H04N13/289 Primary

  Switching between monoscopic and stereoscopic modes · CPC title