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http://dx.doi.org/10.7742/jksr.2018.12.5.631

The Evaluation of Imaging Quality Depending the Shift of the Central Axis in FOCUS DWI Investigation  

Kim, Younghwa (Department of Radiological Science, Dongshin University)
Jeong, Moontaeg (Department of Radiological Science, Dongshin University)
Choi, Namgil (Department of Radiological Science, Dongshin University)
Publication Information
Journal of the Korean Society of Radiology / v.12, no.5, 2018 , pp. 631-636 More about this Journal
Abstract
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.
Keywords
Magnetic Resonance Imaging; Artifact; Uniformity;
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