Data acquisition errors and the choice of filter in filtered backprojection algorithms

Conference · Thu Jun 01 00:00:00 EDT 1989

OSTI ID:5970006

Schneberk, D.; Martz, H.; Azevedo, S.; Skeate, M.

In this paper, we examine issues specific to Filtered Backprojection (FBP) algorithms. While FBP techniques can perform quality image reconstructions, in an economical way, FBP algorithms can produce troublesome artifacts in image reconstructions. At LLNL we have investigated artifacts which result from errors in the measurement of the center of rotation, bad pixels in the projection data (the sinogram), the choice of filter used in the reconstruction code, and difficulties resulting from combinations of these effects. This paper is divided into five sections: a presentation of some fundamentals of computed tomography, and FBP algorithms, a characterization and discussion of centering errors, the effects of singularly-bad pixels, a section on the consequences of choosing different filters in the FBP algorithms in the DONNER library of CT reconstruction routines, and a summary discussion on CT data analysis in industrial inspections. 7 refs., 2 figs.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5970006
• Report Number(s): UCRL-101264; CONF-8907107-2; ON: DE89014051
• Resource Relation: Conference: American Society of Nondestructive Testing topical conference, Seattle, WA, USA, 24-27 Jul 1989; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
IMAGE PROCESSING
ALGORITHMS
COMPUTERIZED TOMOGRAPHY
DATA ACQUISITION SYSTEMS
DIAGNOSTIC TECHNIQUES
MATHEMATICAL LOGIC
PROCESSING
TOMOGRAPHY
420200* - Engineering- Facilities
Equipment
& Techniques
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)