The value of diffusion weighted imaging,dynamic contrast enhancement and fat quantitative technique in evaluating the activity of sacroiliac joint lesions in ankylosing spondylitis
Objective To investigate the value of diffusion weighted imaging(DWI),dynamic contrast enhancement(DCE)and fat quantification techniques in evaluating the activity of sacroiliac joint lesions in ankylosing spondylitis(AS).Methods A total of 62 patients with AS sacroiliac joint lesions were selected,all of which were examined by DWI,DCE-MRI and fat quantitative techniques.The results of active and stable patients were compared,and the correlation of Bath ankylosing spondylitis disease activity index(BASDAI),C-reactive protein,erythrocyte sedimentation rate and each image parameter were analyzed.Results The disease activity index,erythrocyte sedimentation rate,C-reactive protein,apparent diffusion coefficient,ratio of extracellular space volume to vascular content volume,contrast transfer coefficient,extracellular space volume value of Bath ankylosing spondylitis in active patients were higher,and fat fraction value was lower(P＜0.05).BASDAI index,erythrocyte sedimentation rate,C-reactive protein and apparent diffusion coefficient,extracellular space volume to vascular content ratio,contrast transfer coefficient,extracellular space volume,fat fraction value were correlated(P＜0.05).Conclusion DWI,DCE-MRI and fat quantification techniques can effectively evaluate the activity of sacroiliac joint lesion in AS.
Spondylitis,ankylosingSacroiliac arthritisRange of motionDynamic contrast enhance-mentFat quantification
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