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KMID : 1151820150090050307
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Journal of the Korean Society of Radiology
2015 Volume.9 No. 5 p.307 ~ p.314
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Artifacts Improvement by using the Echo Planar Imaging and Pre-Saturation Pulse Band techniques of Reduced Field-Of-View in Breast Magnetic Resonance Imaging Examination
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Lee Jae-Heun
Kim Hyun-Jin
Im In-Chul
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Abstract
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This study was conducted in reducing the involuntary motion artifacts because of lungs and heart movements as well as the aliasing artifacts generated during the use of the reduced-FOV EPI technique while performing breast MRI. Performed on a total of 38 obesity female subjects who visited the clinic for pre-examination before surgery within the period from August 1 to November 30, 2014. The 3.0T MRI scanner equipped with a breast scanning coil. Qualitative and quantitative analyses were each used for the evaluation of the acquired images while an Paired T-test and Wilcoxon rank test were performed to check the statistical significance. The variation ratio rose by 15.69% with the additional application of a pre-saturation pulse in the lesion, by 13.72% near the lesion, and 20.63% in the fat and the contrast-to-noise ratio rose by 10.58% in and near the lesion and by 12.03% in the lesion and fat, respectively. there were increases of 22.05% and 21.42% at 0 and 1000 respectively in qulitative evaluation and growth of 16.10% in apparent diffusion coefficient. it showed a statistically significant result(p<0.05) in signal to noise ratio, contrast to noise ratio, diffusion slope coefficient and apparent diffusion coefficient. The involuntary movements artifacts that occur in the phase encoding direction and the aliasing artifacts are considered to be reduced to obtain the best image in the additional use of the pre-saturation pulse as DWI is acquired.
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KEYWORD
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Breast magnetic resonance imaging examination, Involuntary motion artifact, Aliasing artifact, Saturation pulse
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