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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한자기공명의과학회 Investigative Magnetic Resonance Imaging Investigative Magnetic Resonance Imaging 제21권 제1호
- 발행연도
- 2017.1
- 수록면
- 28 - 33 (6page)
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Purpose: To investigate and compensate the effects of respiration-induced B0 variations on fat quantification of the bone marrow in the lumbar spine.
Materials and Methods: Multi-echo gradient echo images with navigator echoes were obtained from eight healthy volunteers at 3T clinical scanner. Using navigator echo data, respiration-induced B0 variations were measured and compensated. Fat fraction maps were estimated using T2*-IDEAL algorithm from the uncompensated and compensated images. For manually drawn bone marrow regions, the estimated B0 variations and the calculated fat fractions (before and after compensations) were analyzed.
Results: An increase of temporal B0 variations from inferior level to superior levels was observed for all subjects. After compensation using navigator echo data, the effects of the B0 variations were reduced in gradient echo images. The calculated fat fractions show significant differences (P < 0.05) in L1 and L3 between the uncompensated and the compensated.
Conclusion: The results of this study raise the need for considering respirationinducedB0 variations for accurate fat quantification using gradient echo images in the lumbar spine. The use of navigator echo data can be an effective way for the reduction of the effects of respiratory motion on the quantification.
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참고문헌 (17)
참고문헌 신청
Baum T / 2015 / Assessment of whole spine vertebral bone marrow fat using chemical shiftencoding based water-fat MRI / J Magn Reson Imaging 42 : 1018 ~ 1023
Hu X / 1994 / Reduction of signal fluctuation in functional MRI using navigator echoes / Magn Reson Med 31 : 495 ~ 503
Kang BK / 2012 / Hepatic fat quantification : a prospective comparison of magnetic resonance spectroscopy and analysis methods for chemical-shift gradient echo magnetic reso
Lee H / 2015 / SWI of the cervical-spinal cord with respiration noise correction using navigator echo / ISMRM 23rd Annual Meeting & Exhibition
Li X / 2011 / Quantification of vertebral bone marrow fat content using 3 Tesla MR spectroscopy: reproducibility, vertebral variation, and applications in osteoporosis / J Ma
Hu X / 1994 / Reduction of signal fluctuation in functional MRI using navigator echoes / Magn Reson Med 31 : 495 ~ 503
Kang BK / 2012 / Hepatic fat quantification : a prospective comparison of magnetic resonance spectroscopy and analysis methods for chemical-shift gradient echo magnetic reso
Lee H / 2015 / SWI of the cervical-spinal cord with respiration noise correction using navigator echo / ISMRM 23rd Annual Meeting & Exhibition
Li X / 2011 / Quantification of vertebral bone marrow fat content using 3 Tesla MR spectroscopy: reproducibility, vertebral variation, and applications in osteoporosis / J Ma
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