Optical diagnosis system for small animal imaging

• US 6,833,915 B2
• Filed: 07/05/2002
• Issued: 12/21/2004
• Est. Priority Date: 07/06/2001
• Status: Expired due to Fees

• Current Assignee: Transpacific Activa LLC (Intellectual Ventures LLC)
• Original Assignee: Siemens AG
• Inventors: Jochum, Tobias, Beuthan, Jürgen, Hengerer, Arne, Mertelmeier, Thomas
• Primary Examiner(s): Evans, F. L.
• Assistant Examiner(s): GEISEL, KARA E
• Application Number:
  US10/188,745
• Publication Number:
  US 20030035104A1
• Time in Patent Office: 900 Days
• Field of Search: 356/318, 356/72-73, 250/458--46, 600/407
• US Class Current: 356/318
• CPC Class Codes: A61B 2503/40 Animals
• CPC Class Codes: A61B 5/0059 using light, e.g. diagnosis by transillumination, diascopy, fluorescence A61B5/0093, A61B5/1455, A61B5/02416 and A61B5/0261 take precedence
• CPC Class Codes: A61B 6/508 for non-human patients

Abstract

Optical diagnosis system for small animal imaging, in which the animal which has been arranged on a bearing plate and treated with an activatable optical contrast medium is irradiated by an excitation source and the resulting fluorescent radiation that is radiated back is detected by a detector system, in which case the bearing plate is designed as a radiation-transparent window (13) for a reference radiation—generated by a second marker of the contrast medium—for the detection of the initial concentration of the inert contrast medium.

Claims

1. An optical diagnosis system for an animal imaging, comprising:

a bearing plate on which the animal may be arranged for treatment by an inert optical contrast medium having an activatable first marker and a non-activatable second marker;

an excitation source for irradiating the animal and the inert optical contrast medium to initiate a fluorescent radiation in tissue of the animal;

a detector system for detecting the resulting fluorescent radiation as radiated back from the tissue of the animal, wherein,

the detector system is positioned above the bearing plate,

the bearing plate is a radiation transparent window for a reference radiation, generated by a non-activatable second marker, for the detection of an initial concentration of the inert contrast medium in the tissue of the animal, and

the second marker is one of a radioisotope marker and a fluorescent marker with an altered frequency related to the activatable first marker.

2. The optical diagnosis system as claimed in claim 1, further comprising the inert optical contrast medium.

3. The optical diagnosis system as claimed in claim 2, wherein the window (13) is NIR-opaque.

4. The optical diagnosis system as claimed in claim 3, wherein the window (13) comprises thin aluminum sheet.

5. The optical diagnosis system as claimed in claim 3, wherein the window (13) comprises carbon fiber reinforced plastic.

6. The optical diagnosis system as claimed in claim 1, wherein the excitation source comprises an infrared laser diode connected via an optical coupling and a fiber-optic cable to an excitation system with a lens.

7. The optical diagnosis system as claimed in claim 1, wherein the fluorescent radiation is excitable and measurable in different directions in order to obtain 3D information.

8. The optical diagnosis system as claimed in claim 1, characterized in that the excitation source is an infrared laser diode (2).

9. An optical diagnosis system for an animal imaging, comprising:

a bearing plate on which the living animal may be arranged for treatment by an inert optical contrast medium having an activatable first marker and a non-activatable second marker;

an excitation source for irradiating the animal and the inert optical contrast medium to initiate a fluorescent radiation in tissue of the animal;

a first detector system for detecting the resulting fluorescent radiation as radiated back from the tissue of the animal, wherein,

the first detector system is positioned above the bearing plate,

and a second detector system, positioned underneath the bearing table, for detecting a reference radiation by the non-activatable second marker, for detection of an initial concentration of the inert contrast medium in the tissue of the animal,

the bearing plate being a radiation transparent window (13) for the reference radiation, and

the second marker is one of a radioisotope marker and a fluorescent marker with an altered frequency related to the activatable first marker.

10. The optical diagnosis system as claimed in claim 9, wherein, the excitation source is an infrared laser diode.

11. The optical diagnosis system as claimed in claim 9, characterized in that the window (13) is NIR-opaque.

12. The optical diagnosis system as claimed in claim 11, characterized in that the window (13) comprises thin aluminum sheet.

13. The optical diagnosis system as claimed in claim 11, characterized in that the window (13) comprises carbon fiber reinforced plastic.

14. The optical diagnosis system as claimed in claim 9, characterized in that the fluorescent radiation is excitable and measurable in different directions in order to obtain 3D information.

15. The optical diagnosis system as claimed in claim 14, characterized in that the excitation source is an infrared laser diode (2).

16. The optical diagnosis system as claimed in claim 11, characterized in that the excitation source is an infrared laser diode (2).

17. The optical diagnosis system as claimed in claim 12, characterized in that the excitation source is an infrared laser diode (2).

18. The optical diagnosis system as claimed in claim 13, characterized in that the excitation source is an infrared laser diode (2).