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Non-invasive Imaging of Acute Allograft Rejection after Rat Renal Transplantation Using 18F-FDG PET
17:13

Non-invasive Imaging of Acute Allograft Rejection after Rat Renal Transplantation Using 18F-FDG PET

Published on: April 28, 2013

Role of diffusion-weighted MRI in diagnosis of acute renal allograft dysfunction: a prospective preliminary study

M E Abou-El-Ghar1, T A El-Diasty, A M El-Assmy

  • 1Department of Radiology, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt.

The British Journal of Radiology
|January 5, 2012
PubMed
Abstract

Insights

Diffusion-weighted MRI shows promise for diagnosing acute kidney transplant problems. This technique helps differentiate between normal function and conditions like acute tubular necrosis, aiding in transplant management.

Area of Science:

  • Radiology
  • Nephrology
  • Transplant Medicine

Background:

  • Acute impairment of transplanted kidneys is a significant clinical challenge.
  • Accurate and timely diagnosis is crucial for effective management and graft survival.

Purpose of the Study:

  • To evaluate the diagnostic performance of diffusion-weighted (DW) magnetic resonance imaging (MRI) in assessing acute impairment of transplanted kidneys.
  • To determine if DW MRI can differentiate between various causes of acute graft dysfunction.

Main Methods:

  • Coronal T(2)-weighted and DW MRI were performed on 70 patients (49 stable, 21 with acute impairment).
  • Apparent diffusion coefficient (ADC) values were calculated, and diffusion restriction was assessed.
  • Histopathological biopsy results were used as the gold standard for patients with acute impairment.

Main Results:

  • ADC values were significantly lower in patients with acute graft impairment compared to those with stable function (p<0.001).
  • Distinct patterns were observed: normal grafts and acute tubular necrosis (ATN) showed no overlap in ADC values.
  • ATN kidneys exhibited a heterogeneous, mosaic-like pattern on ADC maps, while acute cellular rejection (ACR) also showed low ADC values.

Conclusions:

  • Diffusion-weighted MRI is a promising, non-invasive technique for diagnosing acute renal transplant dysfunction.
  • DW MRI can help differentiate between normal renal allografts and those with acute impairment, including ATN and ACR.

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