Image reconstruction from k-space data

1. How does k-space data contribute to image reconstruction?
2. Which area of k-space contributes to image resolution?
3. How is k-space different from k-space normal image space?
4. Is k-space the image?

How does k-space data contribute to image reconstruction?

It allow MRI to produce magnetic field directionally along x, y, and z axes. It also allows spatial encoding for MRI images in the x, y and z axes that is also called localization. An object is located in the main magnetic field; net magnetization is developed by gradient magnetic field along x, y, z axes.

Which area of k-space contributes to image resolution?

As discussed in Chapter I-5, the central peaks of both k-space and any given echo contribute predominantly to defining image contrast, while the periphery of k-space (or, in the case of an echo, the peripheral ripples) contain high-resolution information about fine details.

How is k-space different from k-space normal image space?

The k-space is an extension of the concept of Fourier space well known in MR imaging. The k-space represents the spatial frequency information in two or three dimensions of an object. The k-space is defined by the space covered by the phase and frequency encoding data.

Is k-space the image?

K-space is the Fourier transform of the MR image. Although the k-space "galaxy" and MR image appear quite different, they contain identical information about the scanned object. The two representations may be converted to one another using an advanced mathematical procedure (the Fourier Transform).