?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Nguyen%2C+Thanh+Trung&rft.aulast=Nguyen&rft.aufirst=Thanh+Trung&rft.date=2016&rft.title=An+efficient+example-based+method+for+CT+image+denoising+based+on+frequency+decomposition+and+sparse+representation&rft.genre=proceeding