Roger W Werne

US Patent:

20110133203, Jun 9, 2011

Filed:

Dec 8, 2009

Appl. No.:

12/633671

Inventors:

Roger W. Werne - San Ramon CA, US
James S. Sullivan - Livermore CA, US
Richard L. Landingham - Livermore CA, US

International Classification:

H01L 31/0248
H01L 29/12
C04B 35/64
H01L 31/18

US Classification:

257 76, 264603, 264483, 264604, 264618, 264682, 257 77, 257E29068, 257431, 257E31002

Abstract:

A photoconductive semiconductor switch according to one embodiment includes a structure of sintered nanoparticles of a high band gap material exhibiting a lower electrical resistance when excited by light relative to an electrical resistance thereof when not exposed to the light. A method according to one embodiment includes creating a mixture comprising particles, at least one dopant, and at least one solvent; adding the mixture to a mold; forming a green structure in the mold; and sintering the green structure to form a transparent ceramic. Additional system, methods and products are also presented.

US Patent:

57449589, Apr 28, 1998

Filed:

Nov 7, 1995

Appl. No.:

8/554446

Inventors:

Roger W. Werne - San Ramon CA

Assignee:

ITI Medical Technologies, Inc. - Livermore CA

International Classification:

G01V 300

US Classification:

324318

Abstract:

A coated instrument for use in a magnetic resonance imaging (MRI) system, a method for designing such an instrument, and an MRI method including the steps of positioning a coated instrument (constructed in accordance with the invention) and a target in the imaging region of an MRI system, and operating the MRI system to produce an image showing both the target and the instrument. The instrument has a non-electrically conductive body covered by an electrically conductive, ultra-thin coating on at least part of the body. The thickness of the coating is determined (preferably experimentally) to be just large enough to cause the instrument to be positively shown in an MR image produced by the MRI system, but not so large as to obscure or distort unacceptably the image of a target (e. g. , a typical target, such as human tissue, with which the instrument is to be imaged) in the same MR image (where both the instrument and target are in the MRI system's imaging region when the MRI system produces the MR image). The ultra-thin coating actually creates an imaging artifact which is sufficient to cause the instrument to be visible, but not so significant as to unacceptably distort the image of the intended target.

US Patent:

57827648, Jul 21, 1998

Filed:

Nov 19, 1996

Appl. No.:

8/754506

Inventors:

Roger W. Werne - San Ramon CA

Assignee:

ITI Medical Technologies, Inc. - Livermore CA

International Classification:

A61B 505
A61B 1000

US Classification:

600411

Abstract:

A medical interventional instrument for use in a magnetic resonance imaging (MRI) or other imaging system, a method for designing such an instrument, and a method including the steps of positioning an instrument having a body with a contrast region (constructed in accordance with the invention) and a target in the imaging region of an imaging system and operating the imaging system to produce an image showing both the target and the contrast agent. The instrument has a carbon-fiber or glass-fiber composite (or zirconia) body which preferably carries a contrast agent which is appropriate to the particular imaging modality to be used with the instrument. The concentration and volume of the contrast agent are determined (preferably experimentally) to cause the instrument to be positively shown in an image produced by the imaging system, without obscuring or distorting unacceptably the image of the target (e. g. , a typical target, such as human tissue) with which the contrast agent is to be imaged. In some preferred embodiments, the contrast agent is a paramagnetic metal ion.