STEFAN POSSE
Pilots at Bayita Ln, Albuquerque, NM
License number
New Mexico A2778746
Issued Date
Jan 2016
Expiration Date
Jan 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
1616 Bayita Ln NW, Albuquerque, NM 87107
Personal information
See more information about STEFAN POSSE at radaris.comName
Address
Phone
1616 Bayita Ln NW, Albuquerque, NM 87107
1616 Bayita Ln NW, Albuquerque, NM 87107
Professional information
Professor
Position:
Professor of Neurology, Electrical and Computer Engineering, and Physics and Astronomy at University of New Mexico School of Medicine, Adjunct Associate Professor of Radiology at University of Washington
Location:
Albuquerque, New Mexico Area
Industry:
Higher Education
Work:
University of New Mexico School of Medicine
since 2003
-
Professor of Neurology, Electrical and Computer Engineering, and Physics and Astronomy
University of Washington
since 1995
-
Adjunct Associate Professor of Radiology
Wayne State University School of Medicine
2000 - Jun 2012
-
Adjunct Associate Professor of Psychiatry and Behavioral Neurosciences
Education:
Universität Bern 1987 - 1990
PhD, NMR in Biomedicine
PhD, NMR in Biomedicine
Superresolution Parallel Magnetic Resonance Imaging
US Patent:
2009028, Nov 19, 2009
Filed:
Apr 17, 2009
Appl. No.:
12/386446
Inventors:
Ricardo Otazo - New York NY, US
Stefan Posse - Albuquerque NM, US
Stefan Posse - Albuquerque NM, US
International Classification:
G06K 9/00
US Classification:
382131
Abstract:
The present invention includes a method for parallel magnetic resonance imaging termed Superresolution Sensitivity Encoding (SURE-SENSE) and its application to functional and spectroscopic magnetic resonance imaging. SURE-SENSE acceleration is performed by acquiring only the central region of k-space instead of increasing the sampling distance over the complete k-space matrix and reconstruction is explicitly based on intra-voxel coil sensitivity variation. SURE-SENSE image reconstruction is formulated as a superresolution imaging problem where a collection of low resolution images acquired with multiple receiver coils are combined into a single image with higher spatial resolution using coil sensitivity maps acquired with high spatial resolution. The effective acceleration of conventional gradient encoding is given by the gain in spatial resolution Since SURE-SENSE is an ill-posed inverse problem, Tikhonov regularization is employed to control noise amplification. Unlike standard SENSE, SURE-SENSE allows acceleration along all encoding directions.
Single-Shot Magnetic Resonance Spectroscopic Imaging With Partial Parallel Imaging
US Patent:
2009009, Apr 9, 2009
Filed:
Apr 24, 2008
Appl. No.:
12/148993
Inventors:
Stefan Posse - Albuquerque NM, US
International Classification:
G01R 33/54
US Classification:
324307
Abstract:
The present invention has a magnetic resonance spectroscopic imaging (MRSI) method that allows collecting a complete spectroscopic image with one spectral dimension and up to three spatial dimensions in a single signal excitation. The method employs echo-planar spatial-spectral encoding combined with phase encoding interleaved into the echo-planar readout train and partial parallel imaging to reconstruct spatially localized absorption mode spectra. This approach enables flexible tradeoff between gradient and RF encoding to maximize spectral width and spatial resolution. Partial parallel imaging (e.g. SENSE or GRAPPA) is employed with this methodology to accelerate the phase encoding dimension. A preferred implementation is with the recently developed superresolution parallel MRI method, which accelerates along both the readout and phase encoding dimensions and thus enables particularly large spectral width and spatial resolution. The symmetrical k-space trajectory of this methodology is designed to compensate phase errors due to convolution of spatial and spectral encoding. This method is suitable for hyperpolarized MRSI, spatial mapping of the diffusion coefficients of biochemicals and functional MRI using quantitative mapping of water relaxation.
Magnetic Resonance Spectroscopy With Real-Time Correction Of Motion And Frequency Drift, And Real-Time Shimming
US Patent:
8604787, Dec 10, 2013
Filed:
Jan 26, 2011
Appl. No.:
12/931196
Inventors:
Stefan Posse - Albuquerque NM, US
International Classification:
G01V 3/00
US Classification:
324309
Abstract:
Disclosed are MR Spectroscopy and MR Spectroscopic Imaging (MRSI) methods comprising the sequential steps of water suppression, spatial prelocalization and spatial-spectral encoding, wherein the water suppression is modified to additionally measure and correct the frequency drift, the change in magnetic field inhomogeneity in the volume of interest, and the object movement. By inserting between the water suppression RF pulse and the dephasing gradient pulses either a phase sensitive MRI encoding module, or a 1D, 2D or 3D high-speed MRSI encoding module with simultaneous acquisition of the decaying water signal it is possible to measure frequency drift, magnetic field inhomogeneity and object movement. This information is used to dynamically change the synthesizer frequency of the scanner, the shim settings and to rotate the encoded k-space. In the preferred implementation this information is computed in real-time during the ongoing scan and via feedback loop downloaded to the acquisition control unit to update the aforementioned parameters before the subsequent data acquisition.
System And Methods For Automatic Placement Of Spatial Supression Regions In Mri And Mrsi
US Patent:
2012019, Aug 2, 2012
Filed:
Oct 24, 2010
Appl. No.:
13/322332
Inventors:
Stefan Posse - Albuquerque NM, US
Andre Van Der Kouwe - Charlestown MA, US
Kunxiu Gao - Boxborough MA, US
Weili Zheng - Troy MI, US
Andre Van Der Kouwe - Charlestown MA, US
Kunxiu Gao - Boxborough MA, US
Weili Zheng - Troy MI, US
Assignee:
STC.UNM - Albuquerque NM
International Classification:
A61B 5/055
US Classification:
600410
Abstract:
A system and methods for imaging a patient organ. The system includes a MRI imaging apparatus communicating with a memory and processor. The method aligns the organ with a standardized organ, and includes a step of spatially normalizing the standardized organ to the patient organ. The method also provides optimized slices of the standardized organ and translates optimized slices of standardized organ into optimized slices of the patient organ. The method images the patient organ according to the optimized slices of the patient organ.
Magnetic Resonance Spectroscopy With Sparse Spectral Sampling And Interleaved Dynamic Shimming
US Patent:
7683614, Mar 23, 2010
Filed:
Apr 24, 2007
Appl. No.:
11/789509
Inventors:
Stefan Posse - Albuquerque NM, US
International Classification:
G01V 3/00
US Classification:
324307, 324309
Abstract:
The present invention relates to a magnetic resonance spectroscopic imaging (MRSI) method, specifically to a magnetic resonance spectroscopic imaging method with up to three spatial dimensions and one spectral dimension. Interleaving dynamically switched magnetic field gradients into the spectroscopic encoding scheme enables multi-region shimming in a single shot to compensate the spatially varying spectral line broadening resulting from local magnetic field gradients. The method also employs sparse spectral sampling with controlled spectral aliasing and nonlinear sampling density to maximize encoding speed, data sampling efficiency and sensitivity.