Further advancements for large area-detector based computed tomography system

Conference · Mon Jan 01 04:00:00 EST 2001

OSTI ID:975270

Davis, A W ^[1]; Keating, S C ^[2]; Claytor, T N ^[3]

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1. Anthony W.
2. Scott C.
3. Thomas N.

We present advancements made to a large area-detector based system for industrial x-ray computed tomography. Past performance improvements in data acquisition speeds were made by use of high-resolution large area, flat-panel amorphous-silicon (a-Si) detectors. The detectors have proven, over several years, to be a robust alternative to CCD-optics and image intensifier CT systems. These detectors also provide the advantage of area detection as compared with the single slice geometry of linear array systems. New advancements in this system include parallel processing of sinogram reconstructions, improved visualization software and migration to frame-rate a-Si detectors. Parallel processing provides significant speed improvements for data reconstruction, and is implemented for parallel-beam, fan-beam and Feldkamp cone-beam reconstruction algorithms. Reconstruction times are reduced by an order of magnitude by use of a cluster of ten or more equal-speed computers. Advancements in data visualization are made through interactive software, which allows interrogation of the full three-dimensional dataset. Inspection examples presented in this paper include an electromechanical device, a nonliving biological specimen and a press-cast plastic specimen. We also present a commonplace item for the benefit of the layperson.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 975270
• Report Number(s): LA-UR-01-1445
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
ALGORITHMS
COMPUTERIZED TOMOGRAPHY
COMPUTERS
DATA ACQUISITION
DETECTION
GEOMETRY
IMAGE INTENSIFIERS
PARALLEL PROCESSING
PERFORMANCE
PLASTICS
VELOCITY