Daniel K Sodickson

US Patent:

6717406, Apr 6, 2004

Filed:

Mar 14, 2000

Appl. No.:

09/524217

Inventors:

Daniel K. Sodickson - Newton MA

Assignee:

Beth Israel Deaconess Medical Center, Inc. - Boston MA

International Classification:

G01V 300

US Classification:

324307, 324309, 324318

Abstract:

Advanced processing techniques can be used to enhance the robustness, efficiency, and quality of several parallel imaging techniques, such as SMASH, SENSE and subencoding. Specifically, a magnetic resonance image is formed by measuring RF signals in an array of RF coils, and tailoring a set of spatial harmonic functions to form a set of tailored spatial harmonics that are adjusted for variations in at least one of angulation of an image plane, field of view, and coil sensitivity calibration. The harmonics may be tailored by selecting automatically a subset of the set of spatial harmonic functions, adjusting the set of spatial harmonic functions by a function not equal to 1, to adjust for sensitivity variations along a phase encode direction, and/or performing separate spatial harmonic fits of the coil sensitivities at different spatial positions to the set of tailored spatial harmonics. The magnetic resonance image may also be formed by generating a set of encoding functions representative a spatial distribution of receiver coil sensitivities and spatial modulations corresponding to the gradient encoding steps, transforming the set of encoding functions to generate a new set of functions representative of distinct spatial positions in the image, and applying the new set of functions to a set of MR signals to form the magnetic resonance image. Matrices inverted during the process of forming the magnetic resonance image may be conditioned by thresholding the eigenvalues of the matrix prior to inversion.

US Patent:

6965232, Nov 15, 2005

Filed:

Feb 3, 2004

Appl. No.:

10/771041

Inventors:

Daniel K. Sodickson - Newton MA, US

Assignee:

Beth Israel Deaconess Medical Center, Inc. - Boston MA

International Classification:

G01V003/00
A61B005/055

US Classification:

324307, 324309, 324318, 600410

Abstract:

A magnetic resonance image may be formed by generating a set of encoding functions representative a spatial distribution of receiver coil sensitivities and spatial modulations corresponding to the gradient encoding steps, transforming the set of encoding functions to generate a new set of functions and applying the new set of functions to the acquired data.

US Patent:

7015695, Mar 21, 2006

Filed:

Apr 19, 2004

Appl. No.:

10/709171

Inventors:

James S. Tropp - Berkeley CA, US
Daniel K. Sodickson - Newton MA, US
Michael A. Ohliger - Cambridge MA, US

Assignee:

GE Medical Systems Global Technology Company, LLC - Waukesha WI

International Classification:

G01V 3/00

US Classification:

324318, 324309

Abstract:

A MRI system having a scanning unit adapted to generate a parallel scan includes a substantially cylindrical member defining a scanning bore and a RF coil assembly mounted in the scanning bore. The RF coil assembly includes a TEM surface resonator.

US Patent:

7511492, Mar 31, 2009

Filed:

Feb 21, 2007

Appl. No.:

11/708968

Inventors:

Daniel K. Sodickson - Larchmont NY, US
Aaron K. Grant - Allston MA, US

Assignee:

Beth Israel Deaconess Medical Center, Inc. - Boston MA

International Classification:

G01V 3/00

US Classification:

324309

Abstract:

In one aspect, a method of obtaining magnetic resonance (MR) and radio-frequency impedance mapping (RFIM) data from a region of an object arranged proximate a plurality of radio-frequency (RF) coils is provided. The method comprises detecting nuclear magnetic resonance (NMR) signals emitted from the region to form, at least in part, first MR data, obtaining at least one impedance measurement from the plurality of RF coils to form, at least in part, first RFIM data, and computing a first RFIM map indicating a spatial distribution in the region of at least one dielectric property, the first RFIM map computed based, at least in part, on the first RFIM data and the first MR data.

US Patent:

7795870, Sep 14, 2010

Filed:

Nov 26, 2008

Appl. No.:

12/324016

Inventors:

Daniel K. Sodickson - Larchmont NY, US
Aaron K. Grant - Allston MA, US

Assignee:

Beth Israel Deaconess Medical Center, Inc. - Boston MA

International Classification:

G01V 3/00

US Classification:

324309

Abstract:

In one aspect, a method of obtaining magnetic resonance (MR) and radio-frequency impedance mapping (RFIM) data from a region of an object arranged proximate a plurality of radio-frequency (RF) coils is provided. The method comprises detecting nuclear magnetic resonance (NMR) signals emitted from the region to form, at least in part, first MR data, obtaining at least one impedance measurement from the plurality of RF coils to form, at least in part, first RFIM data, and computing a first RFIM map indicating a spatial distribution in the region of at least one dielectric property, the first RFIM map computed based, at least in part, on the first RFIM data and the first MR data.

US Patent:

8026721, Sep 27, 2011

Filed:

Feb 25, 2009

Appl. No.:

12/392537

Inventors:

Daniel Sodickson - Larchmont NY, US
Stephan Biber - Erlangen, DE
Markus Vester - Nuremberg, DE
Wolfgang Renz - Erlangen, DE
Wilfried Schnell - Forchheim, DE

Assignee:

Siemens Aktiengesellschaft - Munich

International Classification:

G01V 3/00

US Classification:

324318, 324309

Abstract:

In a magnetic resonance imaging apparatus and method, radio frequency signals are radiated into an examination subject and/or received from the examination subject by an array of radio frequency coils that completely encircles the examination subject, and that is located at a distance from the examination subject out of contact with the examination subject.

US Patent:

20060125475, Jun 15, 2006

Filed:

Sep 17, 2003

Appl. No.:

10/527592

Inventors:

Daniel Sodickson - Newton MA, US
Aaron Grant - Allston MA, US

International Classification:

G01V 3/00
A61B 5/05
H01F 5/00

US Classification:

324300000, 324307000, 600416000, 600425000, 335299000

Abstract:

Methods and apparatus for determining dielectric properties such as conductivity, permittivity and/or permeability of a body are provided. An array of resonant coils () capable of generating electromagnetic radiation are provided proximate a body () to imaged. Properties of the array of coils are influenced by the loading effect of the body. More particularly, one or more resonant properties of the coils are perturbed, the perturbation of which may be measured to obtain an indication of the conductivity, permittivity and permeability of the loading body.

US Patent:

20090093709, Apr 9, 2009

Filed:

May 19, 2008

Appl. No.:

12/152940

Inventors:

Anand S. Patel - Boston MA, US
Philip M. Robson - Brookline MA, US
Charles A. McKenzie - London, CA
Daniel K. Sodickson - Larchmont NY, US

Assignee:

Beth Israel Deaconess Medical Center, Inc. - Boston MA

International Classification:

A61B 5/055

US Classification:

600411

Abstract:

In one aspect, a method for noise reduction in parallel magnetic resonance (MR) imaging using a plurality of radio frequency (RF) coils is provided. The method comprises performing a first MR scan of a target to obtain first MR data, performing a second MR scan of the target to obtain second MR data, the second MR data obtained from operating the plurality of coils substantially in parallel, computing a noise estimate associated with the second MR data based at least in part on the first and second MR data, and obtaining a noise-reduced image based at least in part on the second MR data and the noise estimate.