Diagnostic Value of Spectral CT in Sacroiliitis Associated with Axial Spondyloarthritis

ZHUANG Xiangrong

doi:10.13919/j.issn.2095-6274.ZHJY202410048

Abstract：Objective To analyze the diagnostic value of spectral CT in sacroiliitis in patients with axial spondyloarthritis. Methods 58 patients with axial spondyloarthritis admitted to Zhongshan Hospital affiliated with Xiamen University from January 2020 to August 2024 were selected as the observation group,and 29 healthy individuals who underwent physical examinations at our hospital during the same period were selected as the control group. All study subjects underwent spectral CT scans,and the examination results were analyzed. Re-sults The CT values of the sacral cortical bone and the sacral side water content ratio were similar between the two groups (P>0.05). However,the observation group exhibited significantly higher calcium and water content ratios on the iliac and sacral sides compared to the control group (P<0.05). Additionally,the sacral cortical bone CT value in the observation group was significantly lower than that in the control group (P<0.05). According to CT staging,8 patients (13.79％) were in stage 0,20 patients (34.48％) in stage Ⅰ,8 patients (13.79％) in stage Ⅱ,10 pa-tients (17.24％) in stage Ⅲ,and 12 patients (20.69％) in stage Ⅳ. No significant differences were observed between male and female patients in terms of CT staging (P>0.05). Conclusion Spectral CT can effectively observe bone damage,sclerosis,and edema in patients with sacroiliitis associated with axial spondyloarthritis,enabling quantita-tive analysis. This technique has significant clinical value for diagnosis.