Volume 79, Issue 4 pp. 2216-2227
Full Paper

Assessment of unilateral ureter obstruction with multi-parametric MRI

Feng Wang

Corresponding Author

Feng Wang

Vanderbilt University Institute of Imaging Science, Nashville, Tennessee, USA

Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA

Correspondence to: Feng Wang, PhD, Vanderbilt University Institute of Imaging Science, AA-2105 MCN, 1161 21st Avenue South, Nashville, TN 37232, USA. E-mail: [email protected]Search for more papers by this author
Keiko Takahashi

Keiko Takahashi

Division of Nephrology and Hypertension, Vanderbilt University, Nashville, Tennessee, USA

Search for more papers by this author
Hua Li

Hua Li

Vanderbilt University Institute of Imaging Science, Nashville, Tennessee, USA

Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA

Search for more papers by this author
Zhongliang Zu

Zhongliang Zu

Vanderbilt University Institute of Imaging Science, Nashville, Tennessee, USA

Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA

Search for more papers by this author
Ke Li

Ke Li

Vanderbilt University Institute of Imaging Science, Nashville, Tennessee, USA

Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA

Search for more papers by this author
Junzhong Xu

Junzhong Xu

Vanderbilt University Institute of Imaging Science, Nashville, Tennessee, USA

Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA

Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, USA

Search for more papers by this author
Raymond C. Harris

Raymond C. Harris

Division of Nephrology and Hypertension, Vanderbilt University, Nashville, Tennessee, USA

Search for more papers by this author
Takamune Takahashi

Takamune Takahashi

Division of Nephrology and Hypertension, Vanderbilt University, Nashville, Tennessee, USA

These authors contributed equally to this work.

Search for more papers by this author
John C. Gore

John C. Gore

Vanderbilt University Institute of Imaging Science, Nashville, Tennessee, USA

Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA

Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, USA

These authors contributed equally to this work.

Search for more papers by this author
First published: 24 July 2017
Citations: 29

Abstract

Purpose

Quantitative multi-parametric MRI (mpMRI) methods may allow the assessment of renal injury and function in a sensitive and objective manner. This study aimed to evaluate an array of MRI methods that exploit endogenous contrasts including relaxation rates, pool size ratio (PSR) derived from quantitative magnetization transfer (qMT), chemical exchange saturation transfer (CEST), nuclear Overhauser enhancement (NOE), and apparent diffusion coefficient (ADC) for their sensitivity and specificity in detecting abnormal features associated with kidney disease in a murine model of unilateral ureter obstruction (UUO).

Methods

MRI scans were performed in anesthetized C57BL/6N mice 1, 3, or 6 days after UUO at 7T. Paraffin tissue sections were stained with Masson trichrome following MRI.

Results

Compared to contralateral kidneys, the cortices of UUO kidneys showed decreases of relaxation rates R1 and R2, PSR, NOE, and ADC. No significant changes in CEST effects were observed for the cortical region of UUO kidneys. The MRI parametric changes in renal cortex are related to tubular cell death, tubular atrophy, tubular dilation, urine retention, and interstitial fibrosis in the cortex of UUO kidneys.

Conclusion

Measurements of multiple MRI parameters provide comprehensive information about the molecular and cellular changes produced by UUO. Magn Reson Med 79:2216–2227, 2018. © 2017 International Society for Magnetic Resonance in Medicine.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.