Jian Xu

US Patent:

8183864, May 22, 2012

Filed:

Mar 31, 2010

Appl. No.:

12/750875

Inventors:

Jian Xu - New Hyde Park NY, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

G01V 3/00

US Classification:

324307, 324309

Abstract:

A system for respiratory motion compensated MR imaging or spectroscopy, comprises an MR imaging system. The MR imaging system performs a single imaging scan including, acquiring a first imaging data set representing a spatially localized first imaging region located on a patient diaphragm, using a first RF excitation pulse sequence and by transmitting a nuclei excitation first resonant frequency and receiving data substantially at the first resonant frequency. The MR imaging system derives data representing diaphragm position over a respiratory cycle using the first imaging data set, in the single imaging scan. The MR imaging system in response to determining the diaphragm position is within a predetermined window, acquires a second anatomical imaging data set representing a spatially localized second imaging region using a second RF excitation pulse sequence and by transmitting a nuclei excitation second resonant frequency different to the first resonant frequency and receiving data substantially at the second resonant frequency in the single imaging scan.

US Patent:

8185187, May 22, 2012

Filed:

Mar 11, 2009

Appl. No.:

12/402055

Inventors:

Jian Xu - Kew Gardens NY, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

A61B 5/05

US Classification:

600413

Abstract:

In the acquisition of magnetic resonance imaging or spectroscopic data, 2D PACE is employed to identify an acceptance or shimming window within which the magnetic resonance data are acquired, and to trigger the acquisition of the magnetic resonance data at the same position of the patient's diaphragm in each respiratory cycle. The patient is thereby allowed to freely breath during the data acquisition procedure, but the acquisition of the magnetic resonance data is always able to take place with the patient's diaphragm in the same physical position in each respiratory cycle.

US Patent:

8334691, Dec 18, 2012

Filed:

Nov 19, 2009

Appl. No.:

12/622061

Inventors:

Vivian S. Lee - New York NY, US
Jian Xu - New Hyde Park NY, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA
New York University - New York NY

International Classification:

G01V 3/00

US Classification:

324306, 324309

Abstract:

In a magnetic resonance imaging method for non-contrast imaging of blood at a region in the subject's body, a first 3D MR image is acquired represented by a first 3D volume data set of the region at a first trigger delay time. The first 3D image is acquired using a substantially 90 excitation pulse followed by a plurality of variable flip angle refocus pulses forming an echo train where the refocus pulses are smaller than or equal to 180. To form the first 3D MR image, multiple MR slices are acquired related to the first trigger delay time to speed up the acquisition of the first image. A second 3D MR image is acquired represented by a second 3D volume data set at the same region using the same steps for acquiring the first 3D MR image except that a second trigger delay time is used which is different than the first trigger delay time. The first 3D volume data set and the second 3D volume data set are subtracted to create a third 3D volume data set. From the third 3D volume data set a 2D substantially maximum intensity projection data set is created which may then be displayed to show the blood at the region.

US Patent:

20110263970, Oct 27, 2011

Filed:

Feb 2, 2011

Appl. No.:

13/019379

Inventors:

Jian Xu - New Hyde Park NY, US

Assignee:

SIEMENS MEDICAL SOLUTIONS USA, INC. - Malvern PA

International Classification:

A61B 5/055

US Classification:

600419

Abstract:

A system for Non-Contrast Agent enhanced MR imaging, includes an MR image acquisition device that acquires first and second datasets representing first and second image slabs individually comprising multiple image slices acquired at fast and slow blood flow portions of a heart cycle and oriented substantially perpendicular in at least one axis to direction of vasculature blood flow, in response to a heart cycle synchronization signal. An image data processor processes imaging datasets representing the first and second image slabs to provide first and second volume datasets representing a 3D volume imaged at the fast blood flow portion and the slow blood flow portion respectively and for providing a difference dataset representing an image difference between the first and second volume datasets and enhancing arterial blood flow. A display processor provides data representing an image showing the enhanced arterial blood flow.

US Patent:

20130116545, May 9, 2013

Filed:

May 9, 2012

Appl. No.:

13/467219

Inventors:

Jian Xu - New Hyde Park NY, US

Assignee:

SIEMENS MEDICAL SOLUTIONS USA, INC. - Malvern PA

International Classification:

A61B 5/055
A61B 5/0402

US Classification:

600413

Abstract:

A system for cardiac MR imaging receives a heart rate signal representing heart electrical activity. The system, over multiple successive heart cycles, uses multiple MR imaging RF coils in gradient echo imaging a patient heart, synchronized with the heart rate signal and uses an inversion recovery pulse for inverting myocardium tissue MR signal for an individual heart cycle, to acquire, within multiple individual successive portions of an individual heart cycle, corresponding successive multiple patient heart images. An individual image of an individual heart cycle portion is derived from multiple heart image representative data sets comprising a reduced set of k-space data elements acquired using corresponding multiple coils of the RF imaging coils. An image generator generates an MR image of an individual heart cycle portion using the multiple heart image representative data sets comprising the reduced set of k-space data elements.

US Patent:

20140250489, Sep 4, 2014

Filed:

Feb 18, 2013

Appl. No.:

13/769469

Inventors:

International Business Machines Corporation - , US
Raheleh B. Dilmaghani - Elmsford NY, US
Keith W. Grueneberg - Stewart Manor NY, US
Jorge Lobo - New York NY, US
Jian Xu - San Jose CA, US
Petros Zerfos - New York NY, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

H04L 29/06

US Classification:

726 1

Abstract:

Techniques for policy-aware service composition are provided. In one aspect, a method for creating a policy-compliant service composition is provided. The method includes the following steps. One or more policy rules related to services in the service composition are created. A service composition graph is created that represents the service composition, wherein vertices of the service composition graph represent the services and directional edges of the service composition graph represent potential flows of data between the vertices. During creation of the service composition graph, it is determined whether one or more candidate services comply with the policy rules. Only those of the candidate services that comply with the policy rules are included in the service composition graph, wherein the services included in the service composition graph comprise policy-compliant services, such that the service composition graph comprises only the policy-compliant services.