Imaging device and related methods

• US 8,423,110 B2
• Filed: 07/15/2002
• Issued: 04/16/2013
• Est. Priority Date: 01/09/2002
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Barbato, Louis J., Crowley, Robert J., Chin, Yem
• Primary Examiner(s): Le, Long V.
• Assistant Examiner(s): Weatherby, Ellsworth
• Application Number:
  US10/195,603
• Publication Number:
  US 20030130562A1
• Time in Patent Office: 3,928 Days
• Field of Search: 600/407, 600/424, 600/310, 600/342, 356/402, 356/406, 359/618
• US Class Current: 600/342
• CPC Class Codes: A61B 1/00183 for variable viewing angles
• CPC Class Codes: A61B 1/045 Control thereof
• CPC Class Codes: A61B 1/05 characterised by the image sensor, e.g. camera, being in the distal end portion
• CPC Class Codes: A61B 1/0607 for annular illumination
• CPC Class Codes: A61B 1/0676 at distal tip of an endoscope
• CPC Class Codes: A61B 1/0684 using light emitting diodes [LED]
• CPC Class Codes: H04N 23/54 Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
• CPC Class Codes: H04N 23/56 provided with illuminating means

Abstract

In one embodiment, the invention provides an imaging device having a light source, a photo-sensor and a scanning assembly. In some embodiments, the light source is fixedly mounted in the first end of an elongated sheath and is adapted for illuminating a target, and the photo-sensor is mounted on the scanning assembly, also in the first end of the elongated sheath, and is adapted to detect light energy from the target. In other embodiments, the light source is movably mounted and the detector is held stationary. In other embodiments, both the light source and the photo-sensor are movably mounted. The scanning devices synchronously capture light energy from each of a plurality locations on the target, the light energy resulting from illumination by the light source, and synchronously digitizes the output from the photo-sensor from each of the plurality of locations on the target to generate an image of the target.

Claims

1. An imaging device insertable into a human body comprising:

a sheath;

a light source mounted on a first platform and disposed within the sheath for illuminating at least a portion of a target region;

a photo-sensor mounted on a second platform and disposed within the sheath for sensing light energy received from at least a portion of the target region; and

a movable assembly adapted to move the first platform in at least two dimensions relative to the target region.

2. The imaging device of claim 1 wherein the first and second platforms are the same platform.

3. The imaging device of claim 1 wherein the movable assembly is further adapted to move in at least two dimensions relative to the target region.

4. The imaging device of claim 1 further comprising a plurality of light sources disposed for illuminating at least a portion of a target region.

5. The imaging device of claim 4 wherein at least one of the plurality of light sources is an LED or a laser diode.

6. The imaging device of claim 1 wherein the sheath further comprises an aperture adapted for focussing light on the target region.

7. The imaging device of claim 6 wherein the aperture comprises a divergent lens or a fixed focal length lens.

8. The imaging device of claim 1 wherein the light source provides reflected light or fluorescent light.

9. The imaging device of claim 1 wherein the photo-sensor is a single pixel photo-sensor.

10. The imaging device of claim 1 wherein the sheath further comprises an aperture adapted for focussing light energy received from each of a plurality of illuminated locations of the target region onto the photo-sensor.

11. The imaging device of claim 10 wherein the aperture comprises a fixed focal length lens or a diverging lens.

12. The imaging device of claim 1 wherein the movable assembly comprises an electromagnetic material.

13. The imaging device of claim 1 wherein the movable assembly further comprises an electromagnetic actuator, a microelectronic machine (MEMS)-type actuator or a piezoelectric actuator coupled to the movable platform for controlling movement of the first platform.

14. The imaging device of claim 1 wherein the imaging device is disposable.

15. A method for imaging a target region inside a human body comprising:

positioning a sheath relative to the target region inside the human body;

illuminating at least a portion of a target region with a light source disposed within the sheath;

sensing energy received from at least a portion of the target region with a photo-sensor disposed within the sheath; and

moving the photo-sensor in at least two dimensions relative to the target region with a movable assembly.

16. The method for imaging of claim 15 further comprising:

scanning the target region by moving the photo-sensor in at least two dimensions.

17. The method of imaging of claim 16 further comprising:

mounting the movable assembly on a constant velocity pivot joint adapted for moving the photo-sensor in two dimensions.

18. The method of imaging of claim 16 further comprising:

scanning the target region at a sweep frequency of greater than or equal to about 1 kHz.

19. The method of imaging of claim 16 further comprising:

scanning the target region at a rate of greater than or equal to about 2 Hz.

20. The method of imaging of claim 15 further comprising:

providing a light source of field sequenced color LEDs pulsed in sequence for each of a plurality of locations of the target region; and

scanning the target region by moving the photo-sensor in at least two dimensions to generate a color image of the target region.

21. The method of imaging of claim 15 further comprising:

scanning the target region by moving the photo-sensor in two dimensions to create a raster scan or a circular scan of the target region.

22. The method for imaging of claim 15 further comprising:

synchronously digitizing the sensed energy received by the photo-sensor from each of a plurality of locations of the target region to generate an image of the target region.

23. The method for imaging of claim 15 further comprising:

synchronously scanning light from the light source onto each of a plurality of locations on the target region.