Evaluation of the measurement geometries and data processing algorithms for industrial gamma tomography technology.
In this paper, we evaluated the measurement geometries and data processing algorithms for industrial gamma tomography technology. Several phantoms simulating industrial objects were tested in various conditions with the gamma-ray CT system developed in KAERI (Korea Atomic Energy Research Institute). Radiation was measured with lead shielded 24 1x1in Nal detectors. Regarding the parallel beam geometry, the EM algorithm showed the best resolution among the algebraic reconstruction technique (ART), simultaneous iterative reconstructive technique (SIRT) and expectation maximization (EM). However, the fan beam scanning was more time efficient than the parallel projection for the similar quality of reconstructed image. Future developments of the industrial gamma ray CT will be focused on a large-scale application which is more practical for a diagnosis in the petrochemical industry.
Radioisotope Research Division, Korea Atomic Energy Research Institute, P.O. Box 105, Yuseong, Daejeon 305-353, Republic of Korea. nayoung4493@gmail.com
N Y
NY
Lee
S H
SH
Jung
J B
JB
Kim
D000465:Algorithms; D002617:Chemical Industry; D019652:Extraction and Processing Industry; D005720:Gamma Rays; D007091:Image Processing, Computer-Assisted / Q000379:methods; D019047:Phantoms, Imaging; D014054:Tomography / Q000379:methods*