Effect of disease progression on liver apparent diffusion coefficient values in a murine model of NASH at 11.7 tesla MRI
✍ Scribed by Stephan W. Anderson; Jorge A. Soto; Holly N. Milch; Al Ozonoff; Michael O'Brien; James A. Hamilton; Hernan J. Jara
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 480 KB
- Volume
- 33
- Category
- Article
- ISSN
- 1053-1807
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Purpose:
To evaluate the apparent diffusion coefficient (ADC) values of liver in a murine model of non‐alcoholic steatohepatitis using 11.7 Tesla (T) MRI.
Materials and Methods:
This animal study was IACUC approved. Seventeen male C57BL/6 mice were divided into control (n = 3) and experimental groups (n = 14) fed a methionine‐deficient choline‐deficient (MCD) diet to induce steatohepatitis. Livers underwent ex vivo diffusion‐weighted MR imaging and ADC maps were calculated. A pathologist determined subjective scores of steatosis, classified from 0 to 3. Digital image analysis was used to determine percentage areas of steatosis. Graphs comparing ADC to subjective and digital image analysis (DIA) determinations of steatosis were plotted.
Results:
Subjective assessments of steatosis ranged up to values of 3 and DIA determined areas of steatosis to range up to approximately 16%. ADC values approximated 800 × 10^−6^ mm^2^/s (range, 749–811 × 10^−6^ mm^2^/s, mean 786 × 10^−6^ mm^2^/s) in controls and 500 × 10^−6^ mm^2^/s (range, 478–733 × 10^−6^ mm^2^/s, mean 625 × 10^−6^ mm^2^/s) in experimental mice. Moderate correlation between ADC and subjective scores of steatosis (R = −0.56) was observed. Strong correlation between ADC values and percentage areas of steatosis was between ADC values and percentage areas of steatosis was observed greater (R = −0.81) and very strong correlation was observed with the exclusion of a single outlying data point (R = −0.91).
Conclusion:
Based on the comparison of ADC values and steatosis determinations by DIA, increasing degrees of steatosis are seen to result in decreased hepatic ADC values. J. Magn. Reson. Imaging 2011;33:882–888. © 2011 Wiley‐Liss, Inc.