TY - GEN
T1 - The method of high-accuracy 3D reconstruction for oblique X-ray CT images
AU - Yoshizawa, Satoshi
AU - Tanaka, Toshiyuki
AU - Kikuchi, Kazuo
PY - 2007
Y1 - 2007
N2 - X-ray CT system for industrial inspection has some problems when it inspects flat objects. The problems are expansion rate and contrast. We previously implemented an oblique X-ray CT system, and found those problems were almost solved and mat vertical accuracy was comparatively low. We now intend to improve the vertical accuracy by implementing extra two-arc cone-beam X-ray scan. The two-arc scan is for compensating the lack of data from the conventional oblique scan. The overall reconstruction algorithm is based on inverse Radon transform and Grangeat's formula. In order to evaluate the accuracy of reconstructed images quantitatively, the computer simulation using a BGA phantom was implemented. Through the study it was revealed that the proposed method can compensate the previous reconstruction accuracy, and that proper distribution from both oblique scan and two-arc scan is needed for the correct reconstruction.
AB - X-ray CT system for industrial inspection has some problems when it inspects flat objects. The problems are expansion rate and contrast. We previously implemented an oblique X-ray CT system, and found those problems were almost solved and mat vertical accuracy was comparatively low. We now intend to improve the vertical accuracy by implementing extra two-arc cone-beam X-ray scan. The two-arc scan is for compensating the lack of data from the conventional oblique scan. The overall reconstruction algorithm is based on inverse Radon transform and Grangeat's formula. In order to evaluate the accuracy of reconstructed images quantitatively, the computer simulation using a BGA phantom was implemented. Through the study it was revealed that the proposed method can compensate the previous reconstruction accuracy, and that proper distribution from both oblique scan and two-arc scan is needed for the correct reconstruction.
KW - 3D reconstruction
KW - Feldkamp algorithm
KW - Grangeat's algorithm
KW - Oblique CT
KW - X ray computed tomography
UR - http://www.scopus.com/inward/record.url?scp=50249157915&partnerID=8YFLogxK
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U2 - 10.1109/SICE.2007.4420967
DO - 10.1109/SICE.2007.4420967
M3 - Conference contribution
AN - SCOPUS:50249157915
SN - 4907764286
SN - 9784907764289
T3 - Proceedings of the SICE Annual Conference
SP - 146
EP - 150
BT - SICE Annual Conference, SICE 2007
T2 - SICE(Society of Instrument and Control Engineers)Annual Conference, SICE 2007
Y2 - 17 September 2007 through 20 September 2007
ER -