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KMID : 1151820180120050631
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Journal of the Korean Society of Radiology
2018 Volume.12 No. 5 p.631 ~ p.636
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The Evaluation of Imaging Quality Depending the Shift of the Central Axis in FOCUS DWI Investigation
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Kim Young-Hwa
Jeong Moon-Taeg
Choi Nam-Gil
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Abstract
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The problem that the existing the magnetic resonance image (MRI) was prone to have not only long readout duration and low bandwidth in the phase-encode direction, but also geometric distortion was pointed out. The purpose of this study is to identify the usefulness of FOCUS-DWI through comparing FOCUS-DWI with the Conventional-DWI on a degree of uniformity and artifacts caused by the distance change in the central axis within the magnetic field. In terms of artifacts, there happened irregular striped artifacts in the Conventional-DWI technique, which in particular, more often arose in the central axis. Also, the overlap of imaging drastically increased. By contrast, there were no irregular striped artifacts in the FOCUS-DWI technique. In conclusion, it was found that the FOCUS-DWI technique was superior to the Conventional-DWI technique in terms of artifacts, the overlap of imaging, and a degree of uniformity. In addition, there was no difference of the change in distance from the central axis between the FOCUS-DWI technique and the Conventional-DWI technique. Thus, it is considered the FOCUS-DWI technique having less imaging distortion and high image quality will be highly clinically used.
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KEYWORD
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Magnetic Resonance Imaging, Artifact, Uniformity
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