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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한자기공명의과학회 Investigative Magnetic Resonance Imaging Investigative Magnetic Resonance Imaging 제23권 제4호
- 발행연도
- 2019.1
- 수록면
- 341 - 350 (10page)
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초록· 키워드
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Purpose: To determine the MR parameters affecting India ink artifacts on opposedphase chemical shift magnetic resonance (MR) imaging. Materials and Methods: The use of a female Sprague-Dawley rat was approved by our Institutional Animal Care and Use Committee. Using an iterative decomposition of water and fat with echo asymmetry and least-squares estimation (IDEAL) images, which is a modified Dixon method, axial opposed-phase images of the abdominal cavity were obtained with different MR parameters: series 1, different repetition times (TRs; 400, 2000, and 4000 ms); series 2, different echo times (TEs; 10, 50, and 100 ms); series 3, different field of views (FOVs; 6, 8, 16, and 24 cm); series 4, different echo train lengths (ETLs; 2, 4, and 8); series 5, different bandwidths (25, 50, and 85); and series 6, different slice thicknesses (1, 2, 4, 8, and 16 mm). Artifacts on opposed images obtained with different parameters were compared subjectively by two radiologists. For objective analysis, the thickness of the artifact was measured. Spearman’s correlation between altered MR parameters and thicknesses of India ink artifact was obtained via objective analysis. Results: India ink artifact was increasingly apparent using shorter TE, larger FOV and ETL, and thicker slices upon subjective analysis. The objective analysis revealed a strong negative correlation between the thickness of the artifact and TE (r = -0.870, P < 0.01); however, strong positive correlations were found between FOV (r = 0.854, P < 0.01) and slice thickness (r = 0.971, P < 0.01). Conclusion: India ink artifact was thicker with shorter TE, larger FOV, and larger slice thickness.
목차
등록된 정보가 없습니다.
참고문헌 (16)
참고문헌 신청
Delfaut EM / 1999 / Fat suppression in MR imaging: techniques and pitfalls / Radiographics 19:373~382
Pokharel SS / 2013 / Current MR imaging lipid detection techniques for diagnosis of lesions in the abdomen and pelvis / Radiographics 33:681~702
Adam SZ / 2016 / Chemical shift MR imaging of the adrenal gland: principles, pitfalls, and applications / Radiographics 36:414~432
Brandao S / 2013 / Comparing T1-weighted and T2-weighted three-point Dixon technique with conventional T1-weighted fat-saturation and shorttau inversion recovery (STIR) techniques for the study of the lumbar spine in a short-bore MRI machine / Clin Radiol 68:e617~e623
Low RN / 2009 / Fast spin-echo triple-echo Dixon:initial clinical experience with a novel pulse sequence for fat-suppressed T2-weighted abdominal MR imaging / J Magn Reson Imaging 30:569~577
Pokharel SS / 2013 / Current MR imaging lipid detection techniques for diagnosis of lesions in the abdomen and pelvis / Radiographics 33:681~702
Adam SZ / 2016 / Chemical shift MR imaging of the adrenal gland: principles, pitfalls, and applications / Radiographics 36:414~432
Brandao S / 2013 / Comparing T1-weighted and T2-weighted three-point Dixon technique with conventional T1-weighted fat-saturation and shorttau inversion recovery (STIR) techniques for the study of the lumbar spine in a short-bore MRI machine / Clin Radiol 68:e617~e623
Low RN / 2009 / Fast spin-echo triple-echo Dixon:initial clinical experience with a novel pulse sequence for fat-suppressed T2-weighted abdominal MR imaging / J Magn Reson Imaging 30:569~577
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