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

Table 3

T2∗ (µs) of different parts of the rat tendon calculated from the 3D multiecho UTE images, in preclinical SpA with 600 µmol/kg injection.

T2∗ (µs)	Preinsertional area	Enthesis
Healthy tendon, before USPIO injection at D3	374.7 ± 29.5	408.3 ± 57.3
Healthy tendon, after USPIO injection at D4	411.1 ± 6.3	432 ± 24.3
Pathological tendon, before USPIO injection at D3	323.8 ± 42.4	405.1 ± 15.6
Pathological tendon, after USPIO injection at D4	452 ± 142.3	411.9 ± 85.9

3D multiecho UTE sequence combined with USPIO injection did not detect abnormalities in pathological conditions. D: day.