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A Reconstructed Image Analysis and a Practical Algorithm of the Direct 2‐D Fourier Transform by Noboru Niki is a Computer Science article available to read on EtoBox.

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## Abstract Significant research and development have been made on various kinds of CT's such as the X‐ray, the MRI and the positron, which are applied widely in practice. The CT device is divided into the measurement system and the image reconstruction system. Efforts are still being made at present to improve the resolution and speed of those systems. This paper discusses the 2‐D Fourier transform method, which is one of the image reconstruction methods that have been investigated and applied in the image reconstruction in various types of CT's. Traditionally, the 2‐D Fourier transform method has been considered as suffering from low image quality, although the image can be reconstructed with a high speed. The reason for image degradation is the lack of accuracy in the interpolation in the 2‐D Fourier transform domain, which can be remedied by improving the accuracy. A problem then is that the coordinate transformation in the Fourier domain depends on the individual CT. From such a viewpoint, this paper analyzes the relation between the coordinate transformation and the reconstructed image to indicate the reason for the image degradation. A systematic analysis is made of the reco

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Author

Noboru Niki

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0882-1666)

Published

1990

Language

EN

Field

Computer Science (Physical Sciences)