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http://dx.doi.org/10.5762/KAIS.2013.14.12.6284

Usefulness analysis of radial non-cartesian trajectory in the high-resolution MRA  

Lee, Ho-Beom (Department of Radiology, Asan Medical Center)
Choi, Kwan-Woo (Department of Radiology, Asan Medical Center)
Son, Soon-Yong (Department of Radiology, Asan Medical Center)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.12, 2013 , pp. 6284-6289 More about this Journal
Abstract
With the application of k-space trajectory in a different manner and analyzing the influence of noise and its direction, this study was conducted to obtain high-quality images with minimal influence of noise during an MRI examination for cerebrovascular disease, which has a low signal for imaging. To evaluate influence of the noise of different k-space trajectories, a linear Cartesian coordination trajectory and non-Cartesian coordination trajectory were applied to 38 people who had received a high-resolution MRI examination for the early detection of cerebrovascular disease. As a result, the non-Cartesian coordination trajectory showed a 43.32% lower signal of lumens in the internal carotid artery than a linear Cartesian coordination trajectory, and the noise level was also 50.19% lower in a non-Cartesian coordination trajectory. This result shows that noise occurs less in a non-Cartesian coordination trajectory than a linear Cartesian coordination trajectory, and a non-Cartesian coordination trajectory is more effective in low-signal and low-resolution MRI examination. Therefore, when performing high-resolution MRI examination with a low-signal cerebrovascular system, the use of non-Cartesian coordination k-space trajectory will minimize the influence of noise and provide good images.
Keywords
k-space trajectory; Noise map; Flow artifact; Internal carotid artery; High-resolution MRI;
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