@article{oai:repo.qst.go.jp:00080487, author = {Ali, Khaled and Ohgaki, Hideaki and Zen, Heishun and Kii, Toshiteru and Hayakawa, Takehito and Shizuma, Toshiyuki and Toyokawa, Hiroyuki and Taira, Yoshitaka and Iancu, Violeta and Turturica, Gabriel and C˘alin, Alexandru Ur and Fujimoto, Masaki and Katoh, Masahiro and Hayakawa, Takehito and Shizuma, Toshiyuki}, journal = {IEEE Transactions on Nuclear Science}, month = {Sep}, note = {The isotope selectivity of the Computed Tomography (CT) imaging based on the Nuclear Resonance Fluorescence (NRF) absorption method using a quasi-monochromatic Laser Compton Scattering (LCS) gamma-ray beam in MeV region was demonstrated at the UVSOR-III synchrotron radiation facility with a sample target including two enriched lead isotope rods made of 206Pb and 208Pb. A CT image of 208Pb in the sample target was selectively obtained using an excited state with Jπ=1- at 5.512 MeV in 208Pb. The intensity of the LCS gamma-ray beam was greater than 1×10^8 photons/s without a collimating. A lead collimator with a hole diameter of 1 mm was used. Two-dimensional NRF-CT image of 208Pb isotope distribution was clearly obtained with a 2 mm pixel size resolution which was determined by the horizontal step size of the CT stage.}, pages = {1976--1984}, title = {Selective Isotope CT Imaging Based on Nuclear Resonance Fluorescence Transmission Method}, volume = {67}, year = {2020} }