Application Value Of Dixon Magnetic Resonance Imaging Sequence In Diagnosis Of Marrow Edema Of Sacroiliac Joint In Ankylosing Spondylitis

Objective:To investigate value of Dixon magnetic resonance imaging(MRI)sequence in diagnosis of marrow edema of sacroiliac joint in ankylosing spondylitis(AS)by using bath ankylosing spondylitis disease activity index(BASDAI),bath ankylosing spondylitis functional index(BASFI),C reactive protein,erythrocyte sedimentation rate(ESR)and sacroiliac joint SPARCC score.Methods:40 AS patients in our hospital from November 2011 to February 2018 were selected as the study group and 20 healthy subjects during the same time as the control group.These patients were assessed with BASDAI,BASFI,C reactive protein and ESR after admission.The routine MRI sequence and Dixon sequence scan of the sacroiliac joint were performed in both groups.The Dixon sequence images of the subjects were analyzed by using post-processing workstation,and the water signal values of the Dixon sequence under the bilateral sacroiliac joint surface were measured,and the comparison was made between the groups.The water signal value of Dixon sequence under bilateral sacroiliac joint in the study group was related to the correlation analysis of BASDAI score,BASFI score,C reactive protein,erythrocyte sedimentation rate and sacroiliac joint SPARCC score.Results:The water signal value of Dixon sequence under bilateral sacroiliac joint in the study group was significantly higher than those in the healthy control group(P < 0.05).And it was positively correlated with the BASDAI score,BASFI score,C reactive protein,erythrocyte sedimentation rate and the sacroiliac joint SPARCC score(P < 0.05).Conclusion:MRI Dixon sequence can be used as a reference indicator to evaluate the active period of sacroiliac arthritis,and can make quantitative monitoring of inflammatory edema,which is of great guiding significance for clinical diagnosis and treatment.