Purpose: To investigate the potential of Intravoxel incoherent motion diffusion-weighted imaging(IVIM-DWI) for the assessment of renal fibrosis in chronic kidney disease (CKD), using histopathology as a reference standard. Methods: Eighty-five CKD patients and twenty healthy volunteers were recruited in this study. IVIM-DWI was performed in all of the participants, and all of the CKD patients underwent renal biopsy. The mean values of the true diffusion coefficient (D), pseudo diffusion coefficient (D*) and perfusion fraction (1) in the renal cortex and medulla were compared between the CKD patients and healthy volunteers. The Spearman correlation coefficient was calculated to assess the relationship between the D, D*, f values and the estimated glomerular filtration rate (eGFR), serum creatinine level (SCr), 24 h urinary protein level (24 h-UPRO), histopathological fibrosis scores. Results: The D, D* and f values were significantly lower in medulla than in the cortex for all of the participants. All of the IVIM parameters were significantly lower in the CKD patients than in the healthy controls. In the CKD patients, a significant negative correlation was found between the renal parenchymal D, D*,f values and the 24 h-UPRO, as well as between the renal parenchymal 0, f values and the SCr. There was a significant positive correlation between all of the IVIM parameters and the eGFR. All of the IVIM parameters exhibited a significant negative correlation with the histopathological fibrosis score. Conclusion: IVIM-DWI shows great potential in the noninvasive assessment of renal fibrosis in CKD.
[1]Fudan Univ, Zhongshan Hosp, Shanghai Inst Med Imaging, Dept Radiol, Shanghai 200032, Peoples R China.
[2]Fudan Univ, Zhongshan Hosp, Dept Nephrol, Shanghai 200032, Peoples R China.
[3]Siemens Shenzhen Magnet Resonance Ltd, Shenzhen 518057, Peoples R China.
[4]Nantong Second Peoples Hosp, Dept Radiol, Nantong 226000, Peoples R China.
(8.0+极速模式)