Korean Journal of Radiology

The Korean Society of Radiology (대한영상의학회)
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Histogram Analysis of Diffusion Kurtosis Magnetic Resonance Imaging for Diagnosis of Hepatic Fibrosis

  • Sheng, Ruo-Fan (Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging) ;
  • Jin, Kai-Pu (Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging) ;
  • Yang, Li (Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging) ;
  • Wang, He-Qing (Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging) ;
  • Liu, Hao (Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging) ;
  • Ji, Yuan (Department of Pathology, Zhongshan Hospital, Fudan University) ;
  • Fu, Cai-Xia (MR Collaboration NEA, Siemens Ltd.) ;
  • Zeng, Meng-Su (Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging)
  • Received : 2017.07.05
  • Accepted : 2018.02.09
  • Published : 2018.10.01
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Abstract

Objective: To investigate the diagnostic value of diffusion kurtosis imaging (DKI) histogram analysis in hepatic fibrosis staging. Materials and Methods: Thirty-six rats were divided into carbon tetrachloride-induced fibrosis groups (6 rats per group for 2, 4, 6, and 8 weeks) and a control group (n = 12). MRI was performed using a 3T scanner. Histograms of DKI were obtained for corrected apparent diffusion (D), kurtosis (K) and apparent diffusion coefficient (ADC). Mean, median, skewness, kurtosis and 25th and 75th percentiles were generated and compared according to the fibrosis stage and inflammatory activity. Results: A total of 35 rats were included, and 12, 5, 5, 6, and 7 rats were diagnosed as F0-F4. The mean, median, 25th and 75th percentiles, kurtosis of D map, median, 25th percentile, skewness of K map, and 75th percentile of ADC map demonstrated significant correlation with fibrosis stage (r = -0.767 to 0.339, p < 0.001 to p = 0.039). The fibrosis score was the independent variable associated with histogram parameters compared with inflammatory activity grade (p < 0.001 to p = 0.041), except the median of K map (p = 0.185). Areas under the receiver operating characteristic curve of D were larger than K and ADC maps in fibrosis staging, although no significant differences existed in pairwise comparisons (p = 0.0512 to p = 0.847). Conclusion: Corrected apparent diffusion of DKI histogram analysis provides added value and better diagnostic performance to detect various liver fibrosis stages compared with ADC.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation

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