Benutzer: Gast  Login
Titel:

3D grating-based X-ray phase-contrast computed tomography for high-resolution quantitative assessment of cartilage: An experimental feasibility study with 3T MRI, 7T MRI and biomechanical correlation.

Dokumenttyp:
Journal Article
Autor(en):
Herzen, Julia; Karampinos, Dimitrios C; Foehr, Peter; Birnbacher, Lorenz; Viermetz, Manuel; Burgkart, Rainer; Baum, Thomas; Lohoefer, Fabian; Wildgruber, Moritz; Schilling, Franz; Willner, Marian; Marschner, Mathias; Noël, Peter B; Rummeny, Ernst J; Pfeiffer, Franz; Jungmann, Pia M
Abstract:
Aim of this study was, to demonstrate the feasibility of high-resolution grating-based X-ray phase-contrast computed tomography (PCCT) for quantitative assessment of cartilage.In an experimental setup, 12 osteochondral samples were harvested from n = 6 bovine knees (n = 2 each). From each knee, one cartilage sample was degraded using 2.5% Trypsin. In addition to PCCT and biomechanical cartilage stiffness measurements, 3T and 7T MRI was performed including MSME SE T2 and ME GE T2* mapping sequences for relaxationtime measurements. Paired t-tests and receiver operating characteristics (ROC) curves were used for statistical analyses.PCCT provided high-resolution images for improved morphological cartilage evaluation as compared to 3T and 7T MRI. Quantitative analyses revealed significant differences between the superficial and the deep cartilage layer for T2 mapping as well as for PCCT (P<0.05). No significant difference was detected for PCCT between healthy and degraded samples (P>0.05). MRI and stiffness measurements showed significant differences between healthy and degraded osteochondral samples. Accuracy in the prediction of cartilage degradation was excellent for MRI and biomechanical analyses.In conclusion, high-resolution grating-based X-ray PCCT cartilage imaging is feasible. In addition to MRI and biomechanical analyses it provides complementary, water content independent, information for improved morphological and quantitative characterization of articular cartilage ultrastructure.
Zeitschriftentitel:
PLoS ONE
Jahr:
2019
Band / Volume:
14
Heft / Issue:
2
Seitenangaben Beitrag:
e0212106
Volltext / DOI:
doi:10.1371/journal.pone.0212106
PubMed:
http://view.ncbi.nlm.nih.gov/pubmed/30763375
Print-ISSN:
1932-6203
TUM Einrichtung:
Fachgebiet Neuroradiologie (Prof. Zimmer); Klinik und Poliklinik für Nuklearmedizin; Klinik und Poliklinik für Orthopädie und Sportorthopädie
 BibTeX