Resources Contact Us Home
Method and system for forming image by backprojection

Image Number 13 for United States Patent #5805098.

The method and system quickly and simultaneously generate multi-resolution and high-resolution imagery from projection data obtained, e.g., through synthetic aperture radar, magnetic resonance imaging, x-ray CAT scans, seismic imaging, sonar imaging, and acoustic imaging. The backprojector technique is modified by a quadtree decomposition of the image area. The sensor elements are grouped into subapertures, and an image is formed in each subaperture by backprojection. The subapertures are grouped into larger subapertures and an image is formed in each of the larger subapertures by backprojection. This operation is repeated until a single large subaperture is defined which covers the entire antenna array. In this way, common additions are factored, computed once and reused many times. A set of N projections can produce an N.times.N image through O(N.sup.2 log N) operations.

  Recently Added Patents
Austenitic stainless steel welding wire and welding structure
Modulation of TIM receptor activity in combination with cytoreductive therapy
Pointer display device, pointer display/detection method, pointer display/detection program and information apparatus
Liquid crystal display device
Method and system for expanding axial coverage in iterative reconstruction in computer tomography (CT)
Process for producing polyols
  Randomly Featured Patents
Maintaining privacy for transactions performable by a user device having a security module
Synchronous motor with currents controlled by a single Hall sensor at high speeds
Encapsulation of TRH or its analog
Leak detection and management apparatus including a programmable message device for a hot water heater
Solid state image pickup apparatus, camera and driving method of solid state image pickup apparatus
Dryer vent exhaust adapter device
Document image scanning device
Method of controlled cell-level fusing within a battery pack
Method and system for portset data management
Long wood-type golf club