System and method for confocal imaging within dermal tissue

• US 8,606,343 B2
• Filed: 04/05/2007
• Issued: 12/10/2013
• Est. Priority Date: 10/18/1996
• Status: Expired due to Fees

• Current Assignee: Caliber Imaging & Diagnostics, Inc.
• Original Assignee: Lucid Inc.
• Inventors: Zavislan, James M.
• Primary Examiner(s): Smith, Ruth S
• Application Number:
  US11/784,128
• Publication Number:
  US 20070287921A1
• Time in Patent Office: 2,441 Days
• Field of Search: 600/407, 600/425, 600476-477, 359368-385, 359390-393, 359/798, 359/801
• US Class Current: 600/407
• CPC Class Codes: A61B 5/0068 Confocal scanning
• CPC Class Codes: A61B 5/061 Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body A61B1/00158 takes precedence
• CPC Class Codes: A61B 5/441 Skin evaluation, e.g. for skin disorder diagnosis
• CPC Class Codes: A61B 5/444 Evaluating skin marks, e.g. mole, nevi, tumour, scar
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: A61B 5/6834 using vacuum
• CPC Class Codes: A61B 5/6835 Supports or holders, e.g., articulated arms
• CPC Class Codes: A61B 5/6842 by marking the skin
• CPC Class Codes: A61B 5/6843 Monitoring or controlling sensor contact pressure
• CPC Class Codes: A61B 5/704 Tables

Abstract

An improved system for confocal imaging within dermal tissue of a patient is provided which minimizes instability in confocal images by reducing the relative motion of the tissue with respect to the confocal imaging optics of the system. The system includes a mechanism for maintaining an area of skin tissue under stress by application of force at the edges of the area, and an imaging head coupled to this mechanism for imaging the stressed skin. The mechanism includes a mechanical structure, such as a platen, brace, or attachment, which both supports the imaging head of the system and applies stress to a limited surface area of the tissue to minimize skin motion during confocal imaging.

Claims

1. A system for recording on a recording medium the location of one or more tissue sections imaged by a microscope, said system comprising:

a microscope for imaging in-vivo tissue of a body of a patient to provide one or more images of one or more tissue sections;

means for moving a part of said microscope and the body of the patient with respect to each other in one or more directions during imaging to view different parts of the in-vivo tissue of the patient with said microscope; and

means for applying force to the body of the patient to stabilize the tissue when imaged by said microscope, and said means for applying force having an opening that restricts the extent of the stabilized tissue presentable to the microscope for imaging to that within said opening;

means, coupled to said moving means, for recording on a recording medium information associated with one or more locations of the in-vivo tissue of the patient of said one or more images of tissue sections.

2. The system according to claim 1 further comprising means for applying said recorded information onto the surface of said tissue to indicate the one or more recorded locations of the one or more tissue sections upon the surface of said tissue through which the one or more tissue sections were imaged.

3. The system according to claim 1 wherein said one or more locations represents recordable information as to an extent of a lesion in said imaged tissue.

4. The system according to claim 1 said recording means is movable with respect to said recording medium to enabling recording of said information.

5. The system according to claim 1 wherein said microscope comprises optics through which said microscope images said tissue, and said means for moving comprises a stage coupled to said optics for moving said optics in one or more directions during imaging to view said tissue with said microscope.

6. The system according to claim 5 wherein said stage has one or more micrometers to manually control the stage to position said optics in said one or more directions.

7. The system according to claim 5 wherein said stage is remotely controlled by motors to position said optics in said one or more directions.

8. The system according to claim 5 wherein said means for recording comprises a pen or marker mechanically coupled to said stage to be movable in accordance with movement of said stage, said pen or marker being disposed with respect to said recording medium to apply ink to said recording medium to record one or more locations of said optics with respect to said imaged tissue.

9. A method for recording on a recording medium the location of one or more tissue sections imaged by a microscope, said method comprising the steps of:

moving with respect to each other a part of a microscope that images one or more tissue sections of in-vivo tissue, and a body of a patient, in one or more directions during imaging to view different parts of the in-vivo tissue of the patient;

stabilizing said tissue when imaged by the microscope using a device that applies force to the body of the patient and has an opening which restricts the extent of the stabilized tissue presentable to the microscope for imaging to that within said opening; and

recording on a recording medium positional information relative to said in-vivo tissue of one or more tissue sections imaged by the microscope.

10. The method according to claim 9 further comprising the step of applying said positional information onto the surface of said tissue to indicate the one or more recorded locations of the one or more tissue sections upon the surface of said tissue through which the one or more tissue sections were imaged.

11. The method according to claim 9 wherein said recording step further comprising recording on the recording medium one or more locations to provide information mapping a structure in the tissue existing in the body of the patient when said one or more location were recorded.

12. An apparatus for recording on a recording medium the location of one or more tissue sections imaged by a microscope, said apparatus comprising:

a microscope which images in-vivo tissue of a body of a patient;

a device which applies force to the body of the patient to stabilize the tissue when imaged by said microscope, wherein said device has an opening and restricts the extent of the stabilized tissue presentable to the microscope for imaging to that within said opening;

a recording medium disposed on a surface positionally related to the surface of the tissue through which said microscope images the in-vivo tissue of the body of the patient; and

a pen or marker to mark on said recording medium positional information relative to the tissue imaged by the microscope.

13. The apparatus according to claim 12 wherein said microscope comprise an objective lens.

14. The apparatus according to claim 12 wherein said positional information is recordable onto the surface of said tissue imaged by said microscope.

15. The apparatus according to claim 12 wherein said positional information is associated with a structure in the tissue existing in the body of the patient when said positional information was recorded on said recording medium.

16. The apparatus according to claim 12 wherein:

said device comprises a bottom surface for placing the tissue under stress by application of force by said bottom surface against the body of the patient to stabilize the tissue when imaged by said microscope; and

said opening is located in said bottom surface.

17. The apparatus according to claim 16 wherein said device has a material window in said opening, and said application of force against the body of the patient is provided by at least said bottom surface and said window against the tissue.

18. The apparatus according to claim 12 wherein said device comprises a first device, and said apparatus further comprises a second device for recording on said tissue said positional information which was recorded by said pen or marker on said recording medium.

19. An apparatus for recording on a recording medium the location of one or more tissue sections imaged by a microscope, said apparatus comprising:

a microscope which comprises optics through which said microscope images in-vivo tissue of a body of a patient to provide one or more images of one or more tissue sections;

a first device which with applied force to the body of a patient stabilizes the in-vivo tissue with respect to said optics, wherein said first device has an opening that restricts the extent of the stabilized tissue presentable to the microscope for imaging to that within said opening;

a recording medium; and

a second device linked to said microscope to record on said recording medium one or more positions relative to said optics with respect to said stabilized tissue by said first device during capture of the images of the one or more tissue sections by said microscope.

20. The apparatus according to claim 19 wherein said one or more positions recorded on said recording medium enable a user to record said one or more positions upon the tissue imaged by the microscope.

21. The apparatus according to claim 19 wherein said recording medium is locatable on said first device.

22. The apparatus according to claim 19 wherein said one or more recorded positions on said recording medium are associated with structure of the tissue in said images, and said one or more recorded positions are recordable onto said tissue to enable a user to locate the structure in the tissue associated with said one or more recorded positions.

23. The apparatus according to claim 19 wherein at least one of said one or more images is an image of a tissue section below the surface of the tissue.

24. The apparatus according to claim 19 wherein said second device provides a marking device associated with said recording medium.

25. The apparatus according to claim 19 wherein said recording medium is located outside the view of said tissue by said optics.

26. The apparatus according to claim 19 wherein said optics comprises an objective lens directed towards the tissue, and said first device and said objective lens are movable with respect to each other.

27. The apparatus according to claim 26 wherein movement of said first device and said objective lens with respect to each other in one or more dimensions is transferred into movement of said second device for recording and said recording medium with respect to each other.

28. The apparatus according to claim 19 wherein:

said first device comprises a bottom surface for placing the tissue under stress by application of force by said bottom surface against the body of the patient to stabilize the tissue with respect to said optics; and

said opening is located in said bottom surface.

29. The apparatus according to claim 28 wherein said first device has a window of a material in said opening, and at least said bottom surface and said window provides said application of force against the body of the patient.

30. The apparatus according to claim 19 further comprising a third device for recording upon said tissue said one or more positions recorded by said second device relative to said captured images of said one or more tissue sections by said microscope.

31. A system for recording on a recording medium the location of one or more tissue sections imaged by a microscope, said system comprising:

a microscope which comprises optics through which said microscope images tissue to produce images of one or more tissue sections;

a recording medium;

a first device linked to said microscope to record on said recording medium one or more positions relative to said optics with respect to the tissue during capture of one or more images of one or more tissue sections by said microscope;

a second device for recording one or more locations upon said tissue imaged by said microscope in which said one or more locations are recorded upon said tissue in accordance with the one or more positions recorded by said first device on said recording medium to enable a user to locate structure present in said one or more images of said one or more tissue sections; and

a third device attachable to said microscope having a bottom surface for placing the tissue under stress by application of force by said bottom surface against the body of the patient to stabilize the tissue with respect to said optics, wherein said third device has an opening in said bottom surface, and said opening restricts the extent of the stabilized tissue presentable to said microscope for imaging to that within the opening.

32. The apparatus according to claim 31 wherein said third device is separable from said optics, and wherein said third device has a material window in said opening and said application of force against the body of the patient is provided by at least said lower surface and said window against the tissue.