Diffusion-weighted imaging and pathology of chronic kidney disease: initial study

Area of Science:

• Radiology
• Nephrology
• Medical Imaging

Background:

• Chronic kidney disease (CKD) is a progressive condition characterized by kidney damage and loss of function.
• Histopathologic changes, including tubulointerstitial injury, are key indicators of CKD severity.
• Accurate assessment of these changes is crucial for patient management and prognosis.

Purpose of the Study:

• To evaluate the utility of diffusion-weighted imaging (DWI) in assessing histopathologic alterations in patients with CKD.
• To determine the correlation between apparent diffusion coefficient (ADC) values derived from DWI and specific histopathologic findings.

Main Methods:

• Fifty-two patients diagnosed with CKD underwent DWI prior to renal biopsy.
• Renal ADC values were measured and correlated with semi-quantitatively scored histopathologic changes (tubulointerstitial lesions, tubular atrophy, interstitial fibrosis, glomeruli, and peritubular vessels).
• Statistical analyses including ANOVA and correlation tests were employed to assess relationships.

Main Results:

• Significant negative correlations were observed between renal ADCs and scores for tubulointerstitial lesions, tubular atrophy, and interstitial fibrosis.
• No significant correlations were found between ADCs and glomeruli or peritubular vessel lesions.
• Pathology types showed significant differences in relation to ADC values, but no significant relationship was found with overall pathologic classification.

Conclusions:

• DWI shows promise in detecting tubulointerstitial injury, specifically tubular atrophy and interstitial fibrosis, in CKD patients.
• The findings suggest that DWI can serve as a valuable auxiliary imaging method for nephrologists in evaluating the extent of kidney damage in CKD.