Short Report: A Sponge Phantom Provides a Homogeneous k-Space Pattern at MRI ()
Abstract
Background: The
spectral coverage of magnetic resonance (MR) sequences can be well assessed in
k-space. However, many objects do not provide high signal intensities in the
peripheral k-space. Purpose: To experimentally find a phantom that provides a
homogeneous spectral pattern also at the high spatial frequencies of the
k-space periphery. Material and Methods: Different phantoms were imaged on a
1.5 Tesla magnet, and the resulting MR images were viewed in k-space after fast
Fourier transform. Results: Firstly, phantoms with a homogeneous physical structure
were studied with a T2-weighted MR sequence, but they provided an inhomogeneous
k-space pattern with dominant central low-frequency components. Secondly,
phantoms with an inhomogeneous physical structure were studied. In this group, a
water-soaked sponge showed a relatively homogeneous k-space pattern also at
high spatial frequencies, owing to the fine porous structure. This sponge
phantom can also be soaked with Gadolinium chelates for T1-weighted MR imaging.
Conclusion: A simple sponge phantom provides a homogeneous k-space pattern,
owing to its fine porous structure. This could be utilized in MR sequence
development and for viewing the spectral coverage of MR sequences in k-space.
Share and Cite:
Menke, J. (2014) Short Report: A Sponge Phantom Provides a Homogeneous k-Space Pattern at MRI.
Open Journal of Radiology,
4, 195-200. doi:
10.4236/ojrad.2014.42026.
Conflicts of Interest
The authors declare no conflicts of interest.
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