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Critical Reviews™ in Biomedical Engineering
SJR: 0.207 SNIP: 0.376 CiteScore™: 0.79

ISSN Imprimir: 0278-940X
ISSN On-line: 1943-619X

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Critical Reviews™ in Biomedical Engineering

DOI: 10.1615/CritRevBiomedEng.2018027320
pages 311-339

Diffusion Tensor Imaging of Tendons and Ligaments at Ultra-High Magnetic Fields

Martina Guidetti
Acoustics and Vibrations Laboratory, Richard and Loan Hill Department of Bioengineering, University of Illinois at Chicago, Chicago, IL
Marco Andrea Zampini
Motion-Encoding MRI Laboratory, Richard and Loan Hill Department of Bioengineering, University of Illinois at Chicago, Chicago, IL
Giulia Gandini
Acoustics and Vibrations Laboratory, Richard and Loan Hill Department of Bioengineering, University of Illinois at Chicago, Chicago, IL
Aman Gupta
Affiliated Engineering Laboratories, Inc., Edison, NJ
Weiguo Li
Research Resource Center, University of Illinois at Chicago, Chicago, IL
Richard L. Magin
Diagnostic Imaging System Group (DIS), Richard and Loan Hill Department of Bioengineering, University of Illinois at Chicago, 851 South Morgan Street, Chicago, IL 60607
Vincent M. Wang
Department of Biomedical Engineering and Mechanics, Virginia Tech, Blacksburg, VA

RESUMO

Injuries to tendons and ligaments are a common problem limiting daily activities and athletic participation across all age groups. Conventional magnetic resonance imaging (MRI) is reliable for detecting complete tears in tendons and ligaments, but it has difficulty identifying low-grade injuries due to poor contrast and low intensity signal. We describe recent MRI advances using ultra-high magnetic fields and very short time echoes which overcome many of the limitations of the low signal and the short T2 of connective tissues. Using diffusion and relaxometry measurements at 11.7 T, we measured the high field relaxation times, mean diffusivity, and the fractional anisotropy of rabbit semitendinosus tendons and medial collateral ligaments. We found that ultra-high field diffusion tensor imaging and tractography provide repeatable and quantitative maps of fiber organization, which could improve injury diagnosis and therapeutic treatments and assist in presurgical planning.


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