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    Quantitative analysis of late gadolinium enhancement in hypertrophic cardiomyopathy: comparison of diagnostic performance in myocardial fibrosis between gadobutrol and gadopentetate dimeglumine

    250634.pdf (1.522Mb)
    Access Status
    Open access
    Authors
    Liu, D.
    Ma, X.
    Liu, J.
    Zhao, X.
    Chen, H.
    Xu, L.
    Sun, Zhonghua
    Fan, Z.
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Liu, D. and Ma, X. and Liu, J. and Zhao, X. and Chen, H. and Xu, L. and Sun, Z. et al. 2017. Quantitative analysis of late gadolinium enhancement in hypertrophic cardiomyopathy: comparison of diagnostic performance in myocardial fibrosis between gadobutrol and gadopentetate dimeglumine. International Journal of Cardiovascular Imaging. 33 (8): pp. 1191–1200.
    Source Title
    International Journal of Cardiovascular Imaging
    DOI
    10.1007/s10554-017-1101-7
    ISSN
    1569-5794
    School
    Department of Medical Radiation Sciences
    Remarks

    The final publication is available at Springer via http://dx.doi.org/10.1007/s10554-017-1101-7

    URI
    http://hdl.handle.net/20.500.11937/51412
    Collection
    • Curtin Research Publications
    Abstract

    The purpose of this study was to compare different semi-automated late gadolinium enhancement (LGE) quantification techniques using gadobutrol and gadopentetate dimeglumine contrast agents with regard to the diagnosis of fibrotic myocardium in patients with hypertrophic cardiomyopathy (HCM). Thirty patients with HCM underwent two cardiac MRI protocols with use of gadobutrol and gadopentetate dimeglumine. Contrast-tonoise ratio (CNR) between LGE area and remote myocardium (CNRremote), between LGE area and left ventricular blood pool (CNRpool), and signal-to-noise ratio (SNR) in LGE were compared. The presence and quantity of LGE were determined by visual assessment. With signal threshold versus reference mean (STRM) based thresholds of 2 SD, 5 SD, and 6 SD above the mean signal intensity (SI) of reference myocardium, the full-width at half-maximum (FWHM) technique was used. The volume and segments of the LGE area were compared between the two types of contrast agents. LGE was present in 26 of 30 (86.6%) patients in both protocols. The CNRremote of fibrotic myocardium in gadobutrol and gadopentetate dimeglumine agents was 26.82 ± 14.24 and 21.46 ± 10.59, respectively (P < 0.05). The CNRpool was significantly higher in gadobutrol (9.32 ± 7.64 vs. 6.39 ± 6.11, P < 0.05). The SNR was higher in gadobutrol (33.36 ± 14.35 vs. 27.53 ± 10.91, P < 0.05). The volume of scar size in MR images acquired with gadobutrol were significantly higher than those with gadopentetate dimeglumine (P < 0.05), and the STRM of 5 SD technique showed the greatest agreement with visual assessment (ICC = 0.99) in both examinations. There was no significant difference in fibrotic segments of the fibrotic myocardium in the LGE area (P < 0.05). This study proved that the Gadobutrol was an effective contrast agent for LGE imaging with superior delineation of fibrotic myocardium as compared to gadopentetate dimeglumine. The 5 SD technique yields the closest approximation of the extent of LGE identified by visual assessment.

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