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http://dx.doi.org/10.7742/jksr.2020.14.5.715

A Study on the Reduction of Cross-talk Artifact in Lumbar Magnetic Resonance Imaging : Focused on Concatenation Time Repetition  

Lee, Jae-Heun (Department of Biomedical Health Science,, Graduate School of Dong-Eui University)
Lee, Hyo-Yeong (Department of Biomedical Health Science,, Graduate School of Dong-Eui University)
Publication Information
Journal of the Korean Society of Radiology / v.14, no.5, 2020 , pp. 715-723 More about this Journal
Abstract
Cross-talk artifacts occur in two adjacent groups of axial imaging of lesions lumbar 4-5 and sacrum 1 in lumbar spine MRI. This causes problems in reading lesions in areas corresponding to the posterior vertebra. In this study, we are going to completely remove the cross-talk artifacts through optimal concatenation TR. The region of interested were measured by averaging them into fat (ROI1), erector spinal muscle(lateral tract: iliocostalis lumborum muscle) (ROI2), erector spinal muscle(lateral tract: longissimus muscle) (ROI3), and spinous process (ROI4). The mean signal intensity (SI) was 163.43 ± 25.08 at C4 for ROI1, ROI 2 and ROI 3 at C6, 67.89 ± 11.75 and 69.99 ± 10.91 and ROI4 at C5, respectively (p<0.000). The mean signal to noise ratio (SNR) was 135.45 ± 35.90, 56.92 ± 15.90, 58.77 ± 15.59, and 54.91 ± 118.95 for SNR 1, 2, 3 and 4 (p<0.000). The contrast-to-noise ratio (CNR) was CNR1 78.52 ± 24.11, CNR2 was 76.67 ± 24.38 and CNR3 was 80.54 ± 26.33 in concatenation 6, respectively (p<0.000). The SNR, CNR, and the most efficient concatenation TR value over time are 6, and it is considered to help reduce cross-talk artifact if this is applied to T1 axial images.
Keywords
Lumbar MRI; Cross-Talk Artifact; Concatenation time repetition;
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