Christopher R Allen

US Patent:

8040128, Oct 18, 2011

Filed:

Apr 14, 2009

Appl. No.:

12/423189

Inventors:

David E. Farrell - Cleveland Heights OH, US
Christopher J. Allen - Euclid OH, US
Gary M. Brittenham - Euclid OH, US

International Classification:

H01L 43/06
G01N 27/72

US Classification:

3242072, 324239, 600444

Abstract:

According to one embodiment, an apparatus comprises a magnet assembly to produce a static magnetic field and a set of high-Tflux transformers to detect a flux change from an item when the item is subjected to the static magnetic field produced by the magnet assembly and to produce a current based on the flux change. Additionally, the apparatus comprises a set of magnetoresistive sensors to detect a field produced by a current produced in the set of high-Tflux transformers and a scanning mechanism to produce cyclic relative motion between the apparatus and the item. Furthermore, the apparatus comprises a magnetic shield to shield the magnetoresistive sensors, where the shield is an open ended cylinder made from mu-metal, where mu-metal is a very high magnetic permeability iron-nickel alloy. The apparatus additionally comprises a water interface mechanism to fill a gap between the apparatus and the item with water.

US Patent:

8269499, Sep 18, 2012

Filed:

Jun 1, 2010

Appl. No.:

12/791166

Inventors:

Yoshinori Hamamura - Moreland Hills OH, US
Xiaoyu Yang - Indiana PA, US
Nicholas Castrilla - Ravenna OH, US
Christopher J. Allen - Euclid OH, US
Shinji Mitsui - Nasushiobara, JP

Assignee:

Quality Electrodynamics, LLC - Mayfield Village OH
Toshiba Medical Systems Corporation - Otawara-Shi, Tochigi-Ken

International Classification:

G01V 3/00

US Classification:

324318

Abstract:

An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.

US Patent:

20120306499, Dec 6, 2012

Filed:

Aug 15, 2012

Appl. No.:

13/586122

Inventors:

YOSHINORI HAMAMURA - Moreland Hills OH, US
XIAOYU YANG - Indiana PA, US
NICHOLAS CASTRILLA - Ravenna OH, US
CHRISTOPHER J. ALLEN - Euclid OH, US
SHINJI MITSUI - Nasushiobara-shi, JP

Assignee:

TOSHIBA MEDICAL SYSTEMS CORPORATION - Otawara-shi
QUALITY ELECTRODYNAMICS, LLC - Mayfield Village OH

International Classification:

G01R 33/28

US Classification:

324322

Abstract:

An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.

US Patent:

50593951, Oct 22, 1991

Filed:

Nov 9, 1988

Appl. No.:

7/269138

Inventors:

Gary M. Brittenham - Euclid OH
Christopher J. Allen - Cleveland OH
Tokuhiro Okada - Hyogo, JP
Keiji Fujimoto - Hyogo, JP

Assignee:

Toa Medical Electronics Co., Ltd. - Kobe

International Classification:

G01N 1502

US Classification:

422 73

Abstract:

In particle analysis applied to blood cells, use is made of a distinguishing parameter which is the ratio of pulse height to pulse width derived from individual pulses generated in response to detection of corresponding individual particles. The distribution of the distinguishing parameter is plotted on a distribution of pulse height and pulse width, and a three-dimensional display of pulse height, pulse width and the distinguishing parameter is used in analyzing the particles.

US Patent:

20210302514, Sep 30, 2021

Filed:

Mar 16, 2021

Appl. No.:

17/202793

Inventors:

- Mayfield Village OH, US
Samuel Musilli - Cleveland Heights OH, US
Christopher J. Allen - Euclid OH, US
Labros Petropoulos - Chardon OH, US

International Classification:

G01R 33/34
G01R 33/422
G01R 33/483

Abstract:

Various embodiments of the present disclosure are directed towards a magnetic resonance imaging (MRI) radio frequency (RF) coil. The MRI RF coil comprises a first conductive ring and a second conductive ring. A plurality of rung groups extend between the first and second conductive rings. The plurality of rung groups are spaced uniformly about the first conductive ring. Each of the plurality of rung groups comprises a plurality of conductive rungs extending between and connected to the first and second conductive rings. The plurality of conductive rungs of each of the plurality of rung groups are azimuthally separated from one another by a first azimuth angle. Each of the plurality of rung groups is separated from a neighboring rung group by a spacing that forms a window. Each of the windows have a second azimuth angle that is greater than the first azimuth angle.

US Patent:

20160033598, Feb 4, 2016

Filed:

Sep 11, 2015

Appl. No.:

14/851969

Inventors:

- Mayfield Village OH, US
- Otawara-Shi, JP
Nicholas Castrilla - Ravenna OH, US
Christopher J. Allen - Euclid OH, US
Shinji Mitsui - Nasushiobara-shi, JP

International Classification:

G01R 33/36
G01R 33/54

Abstract:

An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.