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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한자기공명의과학회 Investigative Magnetic Resonance Imaging Investigative Magnetic Resonance Imaging 제22권 제4호
- 발행연도
- 2018.1
- 수록면
- 209 - 217 (9page)
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초록· 키워드
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Purpose: The objective of this study was to obtain improved susceptibility weighted images (SWI) of the cervical spinal cord using respiratory-induced artifact compensation. Materials and Methods: The artifact from B0 fluctuations by respiration could be compensated using a double navigator echo approach. The two navigators were inserted in an SWI sequence before and after the image readouts. The B0 fluctuation was measured by each navigator echoes, and the inverse of the fluctuation was applied to eliminate the artifact from fluctuation. The degree of compensation was quantified using a quality index (QI) term for compensated imaging using each navigator. Also, the effect of compensation was analyzed according to the position of the spinal cord using QI values. Results: Compensation using navigator echo gave the improved visualization of SWI in cervical spinal cord compared to non-compensated images. Before compensation, images were influenced by artificial noise from motion in both the superior (QI = 0.031) and inferior (QI = 0.043) regions. In most parts of the superior regions, the second navigator resulted in better quality (QI = 0.024, P < 0.01) compared to the first navigator, but in the inferior regions the first navigator showed better quality (QI = 0.033, P < 0.01) after correction. Conclusion: Motion compensation using a double navigator method can increase the improvement of the SWI in the cervical spinal cord. The proposed method makes SWI a useful tool for the diagnosis of spinal cord injury by reducing respiratory-induced artifact.
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참고문헌 (29)
참고문헌 신청
Thomas B / 2008 / Clinical applications of susceptibility weighted MR imaging of the brain - a pictorial review / Neuroradiology 50:105~116
Wycliffe ND / 2004 / Reliability in detection of hemorrhage in acute stroke by a new three-dimensional gradient recalled echo susceptibility-weighted imaging technique compared to computed tomography: a retrospective study / J Magn Reson Imaging 20:372~377
Haacke EM / 2004 / Susceptibility weighted imaging (SWI) / Magn Reson Med 52:612~618
Wang M / 2011 / Susceptibility weighted imaging in detecting hemorrhage in acute cervical spinal cord injury / Magn Reson Imaging 29:365~373
Mittal S / 2009 / Susceptibilityweighted imaging: technical aspects and clinical applications, part 2 / AJNR Am J Neuroradiol 30:232~252
Wycliffe ND / 2004 / Reliability in detection of hemorrhage in acute stroke by a new three-dimensional gradient recalled echo susceptibility-weighted imaging technique compared to computed tomography: a retrospective study / J Magn Reson Imaging 20:372~377
Haacke EM / 2004 / Susceptibility weighted imaging (SWI) / Magn Reson Med 52:612~618
Wang M / 2011 / Susceptibility weighted imaging in detecting hemorrhage in acute cervical spinal cord injury / Magn Reson Imaging 29:365~373
Mittal S / 2009 / Susceptibilityweighted imaging: technical aspects and clinical applications, part 2 / AJNR Am J Neuroradiol 30:232~252
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