Siemens Medical Solutions Usa, Inc.

Joseph Y Fang

Sharon Xiaorong Wang

Xavier Battle

James Frank Caruba

Ronald E Malmin

James T Chapman

Manjit Ray

Yanhong Chu

A grid computing system and method is provided for medical data processing. The grid computing system comprises a software infrastructure, and an imaging device capable of interfacing with the software infrastructure over a distributed electronic network. Also included is a plurality of CPUs capable of interfacing with the software infrastructure over the network. The performance of the plurality of CPUs is dependent on balancing load. A large medical dataset is split onto several processing nodes of the plurality of CPUs, respectively, such that performance and power is increased. In the grid computing method, a grid is limited to a nuclear medicine or radiology network. A tight and easy configuration management of computing nodes, and a tight load balancing between standardized nodes are provided. An existing network of CPUs is utilized, such that the greatest benefit is provided at the lowest cost.

Grid computing on radiology network

A system and method for smoothing digital images using a non-orthogonal convolution kernel involves steps for rearranging and remapping input image data and the convolution kernel image from hexagonal coordinate mapping to orthogonal mapping of a memory space thus enabling implementation of a general box filter convolution strategy to smooth the input image.

Systems and methods for processing image pixels in a nuclear medicine imaging system

A method for iterative reconstruction of tomographic images of an object of interest includes obtaining data corresponding to a field of view of a detector, processing the data to prepare a reconstruction support region corresponding to a region within the field of view encompassing the object, and reconstructing a tomographic image using the reconstruction support region. Preferably, the data corresponding to the field of view includes at least one of a projection image of the object, an orbit location of a detector relative to a center of rotation of the detector, or an attenuation coefficient map of the object, which data can be used to describe a reconstruction support region corresponding to the object.

Reconstruction support regions for improving the performance of iterative SPECT reconstruction techniques

A multiple point source test phantom is used for calibration of detector positioning of a nuclear medical imaging apparatus. An absolute coordinate system for the detectors is aligned to an image reconstruction space coordinate system by fitting a Gaussian surface to a peak of a center point source of said test phantom, and using displacement parameters as obtained from the fitted Gaussian surface to calculate a displacement correction parameter, which is used to move a patient bed of the imaging apparatus such that the image reconstruction space is aligned with the absolute coordinate system.

Detector head position calibration and correction for SPECT imaging apparatus using virtual CT

A method and system for calibrating a scintillation camera includes steps of constructing a pair of generic linearity coefficient (LC) matrices from a representative detector based on measurement of non-linearity; and transforming the pair of generic LC matrices according to measured pinhole locations from a lead mask to generate detector specific LC matrices.

Systems and methods for camera calibration

A system and method provide for more accurate SPECT/CT image registration. CT data is utilized to establish a global spatial coordinate system of a common test phantom. The common test phantom is then used to obtain a set of point source nuclear images. Three-dimensional CT point source data is mapped to a two-dimensional image plane of corresponding point source data, to obtain a pair of intersecting projection cones that are used to obtain a set of detector head position correction parameters to correct detector head positioning in the CT coordinate system when obtaining SPECT projection images of the same object.

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Barrington, IL, United States of America

Joseph Y Fang