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Diffusion tensor imaging and tractography for assessment of renal allograft dysfunction-initial results.
MedLine Citation:
PMID:  21710264     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
OBJECTIVES: To evaluate MR diffusion tensor imaging (DTI) as non-invasive diagnostic tool for detection of acute and chronic allograft dysfunction and changes of organ microstructure. METHODS: 15 kidney transplanted patients with allograft dysfunction and 14 healthy volunteers were examined using a fat-saturated echo-planar DTI-sequence at 1.5 T (6 diffusion directions, b = 0, 600 s/mm²). Mean apparent diffusion coefficient (ADC) and mean fractional anisotropy (FA) were calculated separately for the cortex and for the medulla and compared between healthy and transplanted kidneys. Furthermore, the correlation between diffusion parameters and estimated GFR was determined. RESULTS: The ADC in the cortex and in the medulla were lower in transplanted than in healthy kidneys (p < 0.01). Differences were more distinct for FA, especially in the renal medulla, with a significant reduction in allografts (p < 0.001). Furthermore, in transplanted patients a correlation between mean FA in the medulla and estimated GFR was observed (r = 0.72, p < 0.01). Tractography visualized changes in renal microstructure in patients with impaired allograft function. CONCLUSIONS: Changes in allograft function and microstructure can be detected and quantified using DTI. However, to prove the value of DTI for standard clinical application especially correlation of imaging findings and biopsy results is necessary.
Authors:
Katja Hueper; M Gutberlet; T Rodt; W Gwinner; F Lehner; F Wacker; M Galanski; D Hartung
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-6-28
Journal Detail:
Title:  European radiology     Volume:  -     ISSN:  1432-1084     ISO Abbreviation:  -     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-6-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9114774     Medline TA:  Eur Radiol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Hannover Medical School-Germany, Institute for Diagnostic and Interventional Radiology, Carl-Neuberg-Str. 1, 30625, Hannover, Germany, hueper.katja@mh-hannover.de.
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