CA2400702A1 - Method and system for characterization and mapping of tissue lesions - Google Patents

Method and system for characterization and mapping of tissue lesions Download PDF

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Publication number
CA2400702A1
CA2400702A1 CA002400702A CA2400702A CA2400702A1 CA 2400702 A1 CA2400702 A1 CA 2400702A1 CA 002400702 A CA002400702 A CA 002400702A CA 2400702 A CA2400702 A CA 2400702A CA 2400702 A1 CA2400702 A1 CA 2400702A1
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tissue
differentiating agent
optical property
light
optical
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CA002400702A
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French (fr)
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CA2400702C (en
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Demetrios Pelecoudas
Konstantinos Balas
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DYSIS MEDICAL Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/303—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the vagina, i.e. vaginoscopes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/00163—Optical arrangements
    • A61B1/00186—Optical arrangements with imaging filters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
    • A61B1/0646—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements with illumination filters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0075—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0084—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6486—Measuring fluorescence of biological material, e.g. DNA, RNA, cells
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/043—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances for fluorescence imaging
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0071—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by measuring fluorescence emission
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
    • A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N2021/6417—Spectrofluorimetric devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N2021/6417—Spectrofluorimetric devices
    • G01N2021/6423—Spectral mapping, video display
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/21—Polarisation-affecting properties

Abstract

The present invention provides a method and an apparatus for the in vivo, non-invasive, early detection of alterations and mapping of the grade of these alterations, caused in the biochemical and/or in the functional characteristics of epithelial tissues during the development of tissue atypias, dysplasias, neoplasias and cancers. The method is based, at least in part, on the simultaneous measurement of the spatial, temporal and spectral alterations in the characteristics of the light that is re-emitted from the tissue under examination, as a result of a combined tissue excitation with light and special chemical agents. The topical or systematic administration of these agents result in an evanescent contrast enhancement between normal and abnormal areas of tissue. The apparatus enables the capturing of temporally successive imaging in one or more spectral bands simultaneously. Based on the measured data, the characteristic curves that express the agent-tissue interaction kinetics, as well as numerical parameters derived from these data, are determined in any spatial point of the examined area.
Mapping and characterization of the lesion, are based on these parameters.

Claims (51)

1. Use of a differentiating agent in a method for monitoring the effects of said pathology differentiating agent an a tissue, comprising:
administering a pathology differentiating agent to said tissue;
exposing said tissue to broad band, continuous wave optical radiation: and measuring a dynamic optical property of said tissue, after said tissue has interacted with acid pathology differentiating agent, wherein said dynamic optical property is obtained from at least two values of a time-dependent optical property, thereby monitoring the effects of a pathology differentiating agent on a tissue.
2. Use of a differentiating agent in a method for monitoring the effects of said pathology differentiating agent on a tissue, comprising:
administering a pathology differentiating agent to said tissue;
exposing said tissue to optical radiation; and measuring a non-fluorescent dynamic optical property of said tissue, after said tissue has interacted with said pathology differentiating agent, wherein said dynamic optical property is obtained from at least two values of a time-dependent optical property, thereby monitoring the effects of a pathology differentiating agent an a tissue.
3. Use of a differentiating agent in a method for monitoring the effects of said pathology differentiating agent on a tissue, the method comprising:
administering a pathology differentiating agent to said tissue:
exposing said tissue to optical radiation; and while exposing said tissue to optical radiation, measuring a dynamic optical property of said tissue, after said tissue has interacted with said pathology differentiating agent, wherein said dynamic optical property is obtained from at least two values of a time-dependent optical property, thereby monitoring the effects of a pathology differentiating agent on a tissue.
4. Use of a differentiating agent in a method for monitoring and mapping the effects of acid pathology differentiating agent on a tissue, comprising:
administering a pathology differentiating agent to said tissue;
exposing said tissue to broad band, continuous wave optical radiation; and after said tissue has interacted with said pathology differentiating agent, measuring a dynamic optical property at several locations of the tissue to produce a spatial map of the tissue, wherein said dynamic optical property is obtained from at least two values of a time-dependent optical property, thereby monitoring and mapping the effects of a pathology differentiating agent on a tissue.
5. The use of any one of claims 1, 2, 3, or 4, further comprising measuring an optical property of said tissue before said tissue has interacted with said pathology differentiating agent.
6. The use of any one of claims 1, 2, 3, or 4, wherein said pathology differentiating agent is selected from the group consisting of an acidic solution and a basic solution.
7, The use of any one of claims 1, 2, 3, or 4, wherein said tissue is a tissue from the cervix of the uterus.
8. The use any one of claims 1, 2, 3, or 4, wherein said tissue is a vagina tissue.
9. The use of any one of claims 1, 2, 3, or 4, wherein said tissue is a uterus tissue.
10, The use of any one of claims 1, 2, 3, or 4, wherein said tissue is selected from the group consisting of a skin tissue, an oral cavity tissue, a gastrointestinal track tissue, and a respiratory track tissue.
11. Use of a differentiating agent in a method for the in vivo diagnosis and mapping of a tissue abnormality in a subject, comprising administering a pathology differentiating agent to a subject;
exposing a tissue in said subject to optical radiation; and while exposing said tissue to optical radiation, monitoring the dynamic optical property of said tissue after said tissue has interacted with said pathology differentiating agent, wherein acid dynamic optical properly is obtained from at least two values of a time-dependent optical property, thereby diagnosing and mapping a tissue abnormality in a subject.
12. The use of claim 11, wherein said optical radiation is broad band optical radiation.
13. The use of claim 11, wherein said optical radiation is polarized optical radiation.
14. The use of claim 11, wherein said tissue abnormality is selected from the group consisting of a tissue atypia; a tissue dysplasia, a tissue neoplasia, condylomas and cancer.
15. The use of claim 11, wherein said tissue abnormality is neoplasia of any grade.
16. The use of claim 11, wherein said tissue abnormality is a cervical intraepithelial neoplasia.
17. The use of claim 11, wherein said pathology differentiating agent is selected from the group consisting of an acidic solution and a basic solution.
18. The use of claim 11, wherein said tissue is a sample from the cervix of the uterus.
19. The use of claim 11, wherein said tissue is a vaginal tissue.
20. The use of claim 11, wherein said tissue is a uterine tissue.
21, The use of claim 11, wherein said tissue is selected from the group consisting of a skin tissue, an oral cavity tissue a gastrointestinal track tissue. and a respiratory track tissue.
22. A system for diagnosing and mapping a tissue abnormality. the system comprising a detector for measuring a difference in a dynamic optical property between a normal tissue and an abnormal tissue, said difference being caused by applying a pathology differentiating agent to the tissue.
23. The system of claim 22, further comprising an applicator tar applying a pathology differentiating agent to the tissue.
24. The system of claim 23, wherein the applicator is an atomizer.
25. The system of claim 22, wherein the pathology differentiating agent is capable of altering the reflection characteristics of the abnormal tissue.
26. The system of claim 22, wherein the pathology differentiating agent is selected from the group consisting of an acidic solution and a basic solution.
27. The system of claim 22, wherein the detector is suitable for obtaining an emission spectrum for measuring the dynamic optical property of the tissue.
28. The system of claim 22, wherein the detector is suitable for measuring light emitted by the tissue for measuring the dynamic optical property of the tissue.
29. The system of claim 28, further comprising a beam spotter for splitting the light emitted by the tissue into a plurality of beams.
30. The system of claim 29, further comprising a plurality of optical filters, each of the filters transmitting over a specific spectral range, for filtering each of the plurality of beams, wherein the dynamic optical property of the tissue can be measured for each of the plurality of filtered beams.
31. The system of claim 22, further comprising a light source for shining light on the tissue to obtain the difference in the dynamic optical property.
32. The system of claim 22, wherein the light source includes at least one of a laser and a light-emitting diode.
33. The system of claim 22, wherein the light shone on the tissue is linearly polarized in first direction.
34. the system of claim 33, further comprising a linear polarized for polarizing light emitted from the tissue, in response to shining light thereon, in a direction substantially perpendicular to the first direction, thereby reducing a contribution of light reaching the detector arising from tissue surface reflection.
35. The system of claim 31, wherein the light source and the detector are included on an optical head.
36. The system of claim 35, further comprising a probing device connected to the optical head said probing device coupled with the tissue so that relative motion between the tissue and the optical head is substantially eliminated.
37. The system of claim 36, wherein the tissue includes vaginal tissue, and the probing device includes a speculum for insertion into a vagina.
38. The system of claim 36, wherein the tissue includes gastrointestinal.tissue or respiratory tissue, and the probing device includes an endoscope for insertion into a gastrointestinal track or a respiratory track; respectively.
39. The system of claim 36, further comprising a reflective objective lens so that the light source emits a cone of light having a symmetry axis that is substantially coaxial with a longitudinal symmetry axis of the objective lens to substantially reduce multiple reflections of light by at least one of the probing device and the tissue.
40. An apparatus for the in vivo diagnosis and mapping of a tissue abnormality comprising.
a. Optics for collecting light re-emitted by the tissue under analysis for magnification and focusing an image of the tissue;
b. Optical imaging detector:
c. Means for modulating, transferring, displaying and capturing of the image of the tissue;
d. Computer which includes data storage, processing and analysis means;
e. Monitor for displaying images, curves and numerical data;
f. Optics for the optical multiplication of the image of the tissue;
g. Light source consisting of broad band, continuous wave optical radiation for illuminating the tissue:
h. Optical filters for selecting a spectral band of imaging tend illumination;
i. Means for transmitting light and illuminating the tissue;
j. Control electronics; and k. Software for analyzing and processing of data, and for capturing, registering and storing of tissue images obtained at specific spectral bands and time instances, before and after administering an agent or a combination of agents that alter the optical properties of atypical and pathological tissue areas, wherein dynamic optical properties and their spatial map is obtained from the stored images.
41. The apparatus of claim 40, wherein a pseudo-color scale, which represents different values of the dynamic optical properties with different colors, is used for the visualization of tissue areas with abnormalities of different grade.
42. The apparatus of claim 40 or 41, wherein the image is used for the selective surgical removal of the atypical and pathological tissue area.
43. The apparatus of claim 40 or 41, wherein the image is used as a guide for taking a biopsy sample.
44. The apparatus of claim 40 or 41, wherein the image is used for the in vivo detection, mapping, and determination of the borders of epithelial lesions.
45. The apparatus of claim 40 or 41, wherein the parameters determined as a function of dynamic optical properties are used as diagnostic indices for the in vivo identification, grading of epithelial lesions and for the mapping of tissue areas with epithelial lesions of different grade.
46. A system for diagnosing and mapping a tissue abnormality, the system comprising:
a detector measuring a difference in a dynamic optical property between a normal tissue and an abnormal tissue, said difference being caused by applying a pathology differentiating agent to the tissue;
a light source for shining light on the tissue, wherein the light source and the detector are included on an optical head;
a probing device connected to the optical head, said probing device coupled with the tissue so that relative motion between the tissue and the optical head is substantially eliminated; and an applicator for applying a pathology differentiating agent to the tissue.
47. The system of claim 46, wherein the tissue includes vaginal tissue, and the probing device includes a speculum for insertion into a vagina:
48. The system of claim 46, wherein the tissue includes gastrointestinal tissue or respiratory tissue, and the probing device includes an endoscope for insertion into a gastrointestinal track or a respiratory track, respectively.
49. The system of claim 46, further comprising a beam splitter for splitting the light emitted by the tissue into a plurality of beams;
a plurality of optical filters; each of the filters transmitting over a specific spectral range. For filtering of the plurality of beams. wherein the dynamic optical property of the tissue can be measured For each of the plurality of filtered beams.
50. The system of claim 46, wherein the light shone an the tissue is linearly polarized in a first direction.
51. The system of claim 50; farther comprising a linear polarizer for polarizing light emitted from the tissue; in response to shining light thereon, in a direction substantially perpendicular to the first direction, thereby reducing a contribution of light reaching the detector arising from tissue surface reflection.
CA2400702A 2000-03-28 2001-03-28 Method and system for characterization and mapping of tissue lesions Expired - Lifetime CA2400702C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GR20000100102 2000-03-28
GR20000100102 2000-03-28
US09/739,089 2000-12-15
US09/739,089 US20020007123A1 (en) 2000-03-28 2000-12-15 Method and system for characterization and mapping of tissue lesions
PCT/GR2001/000017 WO2001072214A1 (en) 2000-03-28 2001-03-28 Method and system for characterization and mapping of tissue lesions

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CA2400702A1 true CA2400702A1 (en) 2001-10-04
CA2400702C CA2400702C (en) 2010-07-20

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CA2400702A Expired - Lifetime CA2400702C (en) 2000-03-28 2001-03-28 Method and system for characterization and mapping of tissue lesions

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US (7) US20020007123A1 (en)
EP (2) EP1267707B1 (en)
JP (2) JP4217403B2 (en)
CN (1) CN100413460C (en)
AT (1) ATE424757T1 (en)
AU (1) AU4442301A (en)
BR (1) BRPI0108944B8 (en)
CA (1) CA2400702C (en)
CY (1) CY1109134T1 (en)
DE (1) DE60137914D1 (en)
DK (1) DK1267707T3 (en)
ES (2) ES2322235T3 (en)
FI (1) FI20021477A (en)
GR (1) GR1004180B (en)
HK (1) HK1056108A1 (en)
PT (2) PT2057936E (en)
RU (1) RU2288636C2 (en)
WO (1) WO2001072214A1 (en)

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