KSpace data manipulation

1. What does k-space do in MRI?
2. What is k-space and how does it can it affect image contrast?
3. How is k-space data acquired?
4. What is k-space ultrasound?

What does k-space do in MRI?

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.

What is k-space and how does it can it affect image contrast?

[right half black circle] k-space is the Fourier transform of the image: the center of k-space holds low-spatial-frequency information (image contrast), whereas the periphery of k-space holds high-spatial-frequency information (image details).

How is k-space data acquired?

Where do you get the data to fill k-space? The data to fill k-space is taken directly from the MR signal. Because gradients have been applied for phase and frequency encoding, the MR signal is already in a Fourier-like format suitable for filling the k-space matrix.

What is k-space ultrasound?

K-space is a frequency domain representation of ultra- sonic imaging systems and targets. The k-space response of an ultrasonic imaging system is typically found by tak- ing a two-dimensional Fourier transform of the system's pulse echo point spread function.