Barbara Ann Karmanos Cancer Institute

Lawrence Livermore National Security, LLC

Delphinus Medical Technologies, Inc.

Stephen G Azevedo

Peter John Littrup

Nebojsa Duric

David H Chambers

Jeffrey Edward Mast

William D Brown

Kyle Champley

Jeffrey S Kallman

Jerel A Smith

Harry E Martz, Jr

Maurice B Aufderheide

Thomas L Moore

Earle T Holsapple

Earle Holsapple, Iii

Frank Natterer

Robert Henry Barter

Frank Wuebbeling

Sidney W Ferguson

Neb Duric

G Patrick Roberson

Daniel Schneberk

Isaac Seetho

Jeffrey Mast

A system for characterizing the material of an object scanned via a dual-energy computed tomography scanner is provided. The system generates photoelectric and Compton sinograms based on a photoelectric-Compton decomposition of low-energy and high-energy sinograms generated from the scan and based on a scanner spectral response model. The system generates a Compton volume with Compton attenuation coefficients from the Compton sinogram and a photoelectric volume with photoelectric attenuation coefficients from the photoelectric sinogram. The system generates an estimated effective atomic number for a voxel and an estimated electron density for the voxel from the Compton attenuation coefficient and photoelectric coefficient for the voxel and scanner-specific parameters. The system then characterizes the material within the voxel based on the estimated effective atomic number and estimated electron density for the voxel. This information can be used to provide a mapping of known effective atomic numbers and known electron densities to known materials.

System-independent characterization of materials using dual-energy computed tomography

A method and system for examining tissue are provided in which the tissue is maintained in a position so that it may be insonified with a plurality of pulsed spherical or cylindrical acoustic waves. The insonifying acoustic waves are scattered by the tissue so that scattered acoustic radiation including a mix of reflected and transmitted acoustic waves is received. A representation of a portion of the tissue is then derived from the received scattered acoustic radiation.

Computerized ultrasound risk evaluation system

A method and apparatus are provided for investigating tissue in which acoustic data are derived from scattering a plurality of pulsed spherical or cylindrical acoustic waves from a plurality of transmission elements through the tissue to a plurality of receiving elements. The acoustic data, which include a mix of reflected and transmitted acoustic waves, are received and digitized, and a representation of a portion of the tissue is generated from the digitized acoustic data.

Diagnostic analysis of ultrasound data

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Livermore, CA, United States of America

Stephen G Azevedo