Retraction Note: Measurement of image quality in CT images reconstructed with different kernels

The Editorial Board of Journal of the Korean Physical Society have decided to retract the above referenced article for reasons of plagiarism. Following notification by the American Roentgen Ray Society, publisher of the American Journal of Roentgenology, an investigation revealed that substantial portions of the text, notably in the Introduction and Conclusion sections, had been plagiarised from the following sources: