Abstract:

Objective   To investigate the imaging features of CT spectral imaging and MRI in Achilles tendon rupture, and to compare the application value of the two methods. Methods   CT spectral imaging and MRI were both performed in 35 cases with pain and limitation of motion in the Achilles tendon. 30 cases with rupture of the Achilles tendon were confirmed by operation and the patients were divided into complete rupture, incomplete rupture and chronic limitations rupture. Imaging features of the CT spectral imaging and MRI were independently compared and analyzed on the basis of shape, continuity, density, and signal changes of the Achilles tendon by two image experts. The CT spectral imaging and MRI images of the Achilles tendon were compared for statistical analysis. P<0.05 was considered statistically significant. Results   CT spectral imaging signs of Achilles tendon rupture were thickening, circuity and density diminution. MRI signs were hyper-intensity and contracture of broken ends. CT spectral imaging and MRI had no significant difference in complete rupture and incomplete rupture(χ2=0， P＞0.05), but had significant difference in chronicity limitations rupture(χ2=4.17， P＜0.05). Conclusion   Compared with MRI, CT spectral imaging has higher application value in complete rupture and incomplete rupture, and MRI is better than CT spectral imaging in chronic limitations rupture.

Key words: X-ray computed tomography; Spectral imaging; Magnetic resonance imaging (MRI); Achilles tendon