Kin Fai Chan

US Patent:

7824395, Nov 2, 2010

Filed:

Aug 29, 2006

Appl. No.:

11/468275

Inventors:

Kin F. Chan - San Jose CA, US
George Frangineas - Fremont CA, US
Leonard C. DeBenedictis - Palo Alto CA, US
Robert Kehl Sink - Mountain View CA, US

Assignee:

Reliant Technologies, Inc. - Mountain View CA

International Classification:

A61B 18/18

US Classification:

606 10, 606 9, 606 12, 607 88, 607 89, 128898

Abstract:

A method and apparatus for thermal treatment of tissue by irradiating the skin with electromagnetic energy is disclosed. Sources of electromagnetic energy include radio frequency (RF) generators, lasers, and flashlamps. The apparatus includes either a positional sensor or a dosage evaluation sensor, or both types of sensors. These sensors provide feedback to a controller. The controller may control the electromagnetic source parameters, the electromagnetic source activation, and/or the sensor measurement parameters. An additional scanning delivery unit may be operably coupled to the controller or to the sensors to provide a controlled distribution of electromagnetic energy to the target region of the skin. The use of positional measurement sensors and dosage evaluation sensors permits the controller to automatically determine the proper electromagnetic source parameters including, for example, pulse timing and pulse frequency.

US Patent:

7862555, Jan 4, 2011

Filed:

Jul 13, 2007

Appl. No.:

11/778012

Inventors:

Kin F. Chan - San Jose CA, US
George Frangineas - Fremont CA, US
David Dewey - Sunnyvale CA, US
Leonard C. DeBenedictis - Palo Alto CA, US

Assignee:

Reliant Technologies - Mountain View CA

International Classification:

A61B 18/20

US Classification:

606 9, 606 10, 606 12, 607 88, 607 89

Abstract:

In a fractional treatment system, an adjustable mechanism can be used to adjust the beam shape, beam numerical aperture, beam focus depth, and/or beam size to affect the treatment depth and or the character of the resulting lesions. Adjustment of these parameters can improve the efficiency and efficacy of treatment. Illustrative examples of adjustable mechanisms include a set of spacers of different lengths, a rotatable turret with lens elements of different focal distances, an optical zoom lens, and a mechanical adjustment apparatus for adjusting the spacing between two optical lens elements. In one aspect, the fractional treatment is configured with a laser wavelength that is selected such that absorption of the laser wavelength within the tissue decreases as the tissue is heated by the laser (e. g. , 1480-1640 nm). Desirably, the laser wavelength is primarily absorbed within a treated region of skin by water and has a thermally adjusted absorption coefficient within the range of about 7 cmto about 26 cm.

US Patent:

7938821, May 10, 2011

Filed:

Jul 13, 2007

Appl. No.:

11/777965

Inventors:

Kin F. Chan - San Jose CA, US
George Frangineas - Fremont CA, US
David Dewey - Sunnyvale CA, US
Leonard C. DeBenedictis - Palo Alto CA, US

Assignee:

Reliant Technologies, Inc. - Hayward CA

International Classification:

A61B 18/20

US Classification:

606 9, 606 3, 606 10, 606 17, 607 88, 607 89

Abstract:

A fractional treatment system can be configured with a laser wavelength that is selected such that absorption of the laser wavelength within the tissue increases as the tissue is heated by the laser (e. g. , 1390-1425 nm). Desirably, the laser wavelength is primarily absorbed within a treated region of skin by water and has a thermally adjusted absorption coefficient within the range of about 8 cmto about 30 cm. An adjustable mechanism can be used to adjust the beam shape, beam numerical aperture, beam focus depth, and/or beam size to affect the treatment depth and or the character of the resulting lesions. The system may be designed to be switchable between a treatment mode that is semi-ablative and a treatment mode that is not semi-ablative. Adjustment of these parameters can improve the efficiency and efficacy of treatment. Illustrative examples of adjustable mechanisms include a set of spacers of different lengths, a rotatable turret with lens elements of different focal distances, an optical zoom lens, and a mechanical adjustment apparatus for adjusting the spacing between two optical lens elements.

US Patent:

8286640, Oct 16, 2012

Filed:

Nov 29, 2010

Appl. No.:

12/955405

Inventors:

Kin F. Chan - San Jose CA, US
George Frangineas - Freemont CA, US
David Dewey - Mountain View CA, US
Leonard C. DeBenedictis - Palo Alto CA, US

Assignee:

Reliant Technologies, Inc. - Hayward CA

International Classification:

A61B 19/00
A61B 18/20

US Classification:

128898, 606 3, 606 9

Abstract:

A fractional treatment system can be configured with a laser wavelength that is selected such that absorption of the laser wavelength within the tissue increases as the tissue is heated by the laser (e. g. , 1390-1425 nm). Desirably, the laser wavelength is primarily absorbed within a treated region of skin by water and has a thermally adjusted absorption coefficient within the range of about 8 cmto about 30 cm. An adjustable mechanism can be used to adjust the beam shape, beam numerical aperture, beam focus depth, and/or beam size to affect the treatment depth and or the character of the resulting lesions. The system may be designed to be switchable between a treatment mode that is semi-ablative and a treatment mode that is not semi-ablative. Adjustment of these parameters can improve the efficiency and efficacy of treatment. Illustrative examples of adjustable mechanisms include a set of spacers of different lengths, a rotatable turret with lens elements of different focal distances, an optical zoom lens, and a mechanical adjustment apparatus for adjusting the spacing between two optical lens elements.

US Patent:

8313481, Nov 20, 2012

Filed:

Nov 29, 2010

Appl. No.:

12/955396

Inventors:

Kin F. Chan - San Jose CA, US
George Frangineas - Freemont CA, US
David Dewey - Mountain View CA, US
Leonard C. Debenedictis - Palo Alto CA, US

Assignee:

Reliant Technologies, Inc. - Hayward CA

International Classification:

A61B 18/20

US Classification:

606 9, 606 3, 606 10, 606 17, 607 88, 607 89

Abstract:

In a fractional treatment system, an adjustable mechanism can be used to adjust the beam shape, beam numerical aperture, beam focus depth, and/or beam size to affect the treatment depth and or the character of the resulting lesions. Adjustment of these parameters can improve the efficiency and efficacy of treatment. Illustrative examples of adjustable mechanisms include a set of spacers of different lengths, a rotatable turret with lens elements of different focal distances, an optical zoom lens, and a mechanical adjustment apparatus for adjusting the spacing between two optical lens elements. In one aspect, the fractional treatment is configured with a laser wavelength that is selected such that absorption of the laser wavelength within the tissue decreases as the tissue is heated by the laser (e. g. , 1480-1640 nm). Desirably, the laser wavelength is primarily absorbed within a treated region of skin by water and has a thermally adjusted absorption coefficient within the range of about 7 cmto about 26 cm.

US Patent:

8435234, May 7, 2013

Filed:

Nov 7, 2007

Appl. No.:

11/983334

Inventors:

Kin F. Chan - San Jose CA, US
Leonard C. DeBenedictis - Palo Alto CA, US

Assignee:

Reliant Technologies, Inc. - Hayward CA

International Classification:

A61B 18/18

US Classification:

606 9, 606 10, 606 13, 607 88, 128898

Abstract:

The present invention relates to a method and apparatus for using an imaging detector to image an optical pattern created by illumination of a viscous material that is applied to the skin. The viscous material forms a detectable pattern that can be imaged by the imaging detector. In some examples, the viscous material is reflective and allows reflection from an illumination source to create an optical pattern on the imaging detector. In other cases, the variation in thickness of an absorbing or scattering viscous substance can be imaged by the detector. Polarized illumination and detection can be used to enhance the response.

US Patent:

20070198068, Aug 23, 2007

Filed:

Oct 10, 2006

Appl. No.:

11/548248

Inventors:

Kin Chan - San Jose CA, US
Basil Hantash - East Palo Alto CA, US
G. Herron - La Honda CA, US
Vikramaditya Bedi - Redwood City CA, US

International Classification:

A61N 5/06

US Classification:

607088000

Abstract:

Subjects treated with nonablative fractional photothermolysis (FP) have an intact stratum corneum, but can have microscopic lesions and vacuole formation within the epidermis. The vacuoles thus formed can trap dermal material and extrude it through the epidermis. Thus, FP can be used for the treatment of recalcitrant melasma, solar elastosis, and tattoos.

US Patent:

20080161782, Jul 3, 2008

Filed:

Oct 26, 2007

Appl. No.:

11/925697

Inventors:

Kin F. Chan - San Jose CA, US
Basil M. Hantash - East Palo Alto CA, US
Vikramaditya P. Bedi - Redwood City CA, US
George Frangineas - Fremont CA, US

Assignee:

Reliant Technologies, Inc. - Mountain View CA

International Classification:

A61B 18/20
A61K 31/341
A61P 17/00

US Classification:

606 9, 514474

Abstract:

A method and device for delivering active substances into and through the skin for treatment of the skin during and/or following fractional laser radiation treatment of the skin are described.