In:
Review of Scientific Instruments, AIP Publishing, Vol. 73, No. 3 ( 2002-03-01), p. 1605-1607
Abstract:
A simple, but powerful, parallel image computing system based on a filtered back-projection algorithm [Dowd et al., Proc. SPIE 3772, 224 (1999)] has been implemented for computerized tomography (CT) in a distributed computing framework by connecting several personal computers (PC) via the Internet. The computing architecture consists of four major components: experimental control, publisher, subscribers, and 3D shaper. The system performance is optimized by an unequal data distribution scheme that takes the computation capability of each subscriber into account. Our result shows that it takes 4.4 s to calculate one two-dimensional charge coupled device projection image of 512×512 pixels when six Pentium III 800 MHz computers each equipped with 512 MB RAM are included in the system. The computation efficiency can be further improved if more computers are utilized. Under this framework, a faster-than-data-acquisition image process for computerized tomography is achievable. The performance of the system is tested using a He–Ne laser as the light source. Despite the artifacts and noises caused by strong absorption, diffraction, and deflection, the image of a 3-pin connector test sample can still be reconstructed clearly and correctly.
Type of Medium:
Online Resource
ISSN:
0034-6748
,
1089-7623
Language:
English
Publisher:
AIP Publishing
Publication Date:
2002
detail.hit.zdb_id:
209865-9
detail.hit.zdb_id:
1472905-2
SSG:
11
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