Early Achilles Enthesis Involvement in a Murine Model of Spondyloarthropathy: Morphological Imaging with Ultrashort Echo-Time Sequences and Ultrasmall Superparamagnetic Iron Oxide (USPIO) Particle Evaluation in Macrophagic Detection

Figure 2

Sagittal RARE T2 Fat-Sat sequence (a) and 3D-UTE PD-w acquisition sequence (b) with focus on normal preinsertional and pathological enthesis area (in vivo) for morphologic assessment. The anterior part of the enthesis looks brighter than the posterior part in in vivo assessment in UTE sequences but not in RARE T2 Fat-Sat acquisition sequences at D3. Correlation with histology in the same rat before USPIO injection in MT (c) with moderate fibrillar disorganization of the anterior fibrocartilage (blue star) and normal posterior enthesis (red star). Calcaneum bone marrow is represented by black star.

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