Andreas Berg1, Thomas Singer, Ewald Moser. 1. Department of Medical Physics, University of Vienna, Woehringerstr, 13, A-1090 Vienna, Austria. berg@univie.ac.at
Abstract
RATIONALE AND OBJECTIVES: To establish whether it is possible to quantitatively characterize the degenerative changes in cartilage that typify arthritis on a sub-150-microm resolution scale using a 3.0 T whole body MR-scanner with a reasonable measurement time. MATERIALS AND METHODS: This problem is addressed through diffusion-microimaging investigations on an arthritis model based on the enzymatic destruction of the proteoglycans in cartilage specimen. A 35-mm birdcage resonator made high spatial resolution possible, and diffusion-micro-imaging was achieved with the use of a strong gradient system. RESULTS: Diffusion-weighted and quantitative parameter maps were acquired with 117 x 234 microm2 pixel resolution in less than 9 minutes. Diffusivity profiles and parameter images exhibit an increase in diffusivity in degenerated tissue. CONCLUSION: In a trypsin-based arthritis model, the spatial localization and quantification of damaged areas have been shown to be possible on a whole body 3.0 T MR system. Measurement times achieved for these high spatial resolution studies make in vivo investigations feasible.
RATIONALE AND OBJECTIVES: To establish whether it is possible to quantitatively characterize the degenerative changes in cartilage that typify arthritis on a sub-150-microm resolution scale using a 3.0 T whole body MR-scanner with a reasonable measurement time. MATERIALS AND METHODS: This problem is addressed through diffusion-microimaging investigations on an arthritis model based on the enzymatic destruction of the proteoglycans in cartilage specimen. A 35-mm birdcage resonator made high spatial resolution possible, and diffusion-micro-imaging was achieved with the use of a strong gradient system. RESULTS: Diffusion-weighted and quantitative parameter maps were acquired with 117 x 234 microm2 pixel resolution in less than 9 minutes. Diffusivity profiles and parameter images exhibit an increase in diffusivity in degenerated tissue. CONCLUSION: In a trypsin-based arthritis model, the spatial localization and quantification of damaged areas have been shown to be possible on a whole body 3.0 T MR system. Measurement times achieved for these high spatial resolution studies make in vivo investigations feasible.
Authors: Nuschin Morakkabati-Spitz; Jürgen Gieseke; Christiane Kuhl; Götz Lutterbey; Marcus von Falkenhausen; Frank Träber; Tjoung-Won Park-Simon; Oliver Zivanovic; Hans H Schild Journal: Eur Radiol Date: 2005-10-14 Impact factor: 5.315
Authors: Teodoro Martín Noguerol; Jose G Raya; Daniel E Wessell; Joan C Vilanova; Ignacio Rossi; Antonio Luna Journal: Br J Radiol Date: 2019-08-23 Impact factor: 3.039