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3D T1 relaxation time measurements in an equine model of subtle post-traumatic osteoarthritis using MB-SWIFT.
Pala, Swetha; Hänninen, Nina E; Mohammadi, Ali; Ebrahimi, Mohammadhossein; Te Moller, Nikae C R; Brommer, Harold; René van Weeren, P; Mäkelä, Janne T A; Korhonen, Rami K; Afara, Isaac O; Töyräs, Juha; Mikkonen, Santtu; Nissi, Mikko J; Nykänen, Olli.
Afiliación
  • Pala S; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Hänninen NE; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Mohammadi A; Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Oulu, Finland.
  • Ebrahimi M; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Te Moller NCR; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Brommer H; Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Oulu, Finland.
  • René van Weeren P; Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
  • Mäkelä JTA; Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
  • Korhonen RK; Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
  • Afara IO; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Töyräs J; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Mikkonen S; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Nissi MJ; Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
  • Nykänen O; Science Service Center, Kuopio University Hospital, Kuopio, Finland.
J Orthop Res ; 41(12): 2657-2666, 2023 12.
Article en En | MEDLINE | ID: mdl-37203565
The aim of this study is to assess whether articular cartilage changes in an equine model of post-traumatic osteoarthritis (PTOA), induced by surgical creation of standard (blunt) grooves, and very subtle sharp grooves, could be detected with ex vivo T1 relaxation time mapping utilizing three-dimensional (3D) readout sequence with zero echo time. Grooves were made on the articular surfaces of the middle carpal and radiocarpal joints of nine mature Shetland ponies and osteochondral samples were harvested at 39 weeks after being euthanized under respective ethical permissions. T1 relaxation times of the samples (n = 8 + 8 for experimental and n = 12 for contralateral controls) were measured with a variable flip angle 3D multiband-sweep imaging with Fourier transform sequence. Equilibrium and instantaneous Young's moduli and proteoglycan (PG) content from OD of Safranin-O-stained histological sections were measured and utilized as reference parameters for the T1 relaxation times. T1 relaxation time was significantly (p < 0.05) increased in both groove areas, particularly in the blunt grooves, compared with control samples, with the largest changes observed in the superficial half of the cartilage. T1 relaxation times correlated weakly (Rs ≈ 0.33) with equilibrium modulus and PG content (Rs ≈ 0.21). T1 relaxation time in the superficial articular cartilage is sensitive to changes induced by the blunt grooves but not to the much subtler sharp grooves, at the 39-week timepoint post-injury. These findings support that T1 relaxation time has potential in detection of mild PTOA, albeit the most subtle changes could not be detected.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Osteoartritis / Huesos del Carpo / Cartílago Articular Tipo de estudio: Prognostic_studies Aspecto: Ethics Límite: Animals Idioma: En Revista: J Orthop Res Año: 2023 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Osteoartritis / Huesos del Carpo / Cartílago Articular Tipo de estudio: Prognostic_studies Aspecto: Ethics Límite: Animals Idioma: En Revista: J Orthop Res Año: 2023 Tipo del documento: Article País de afiliación: Finlandia Pais de publicación: Estados Unidos