Abstract: Objective To explore the early diagnostic value of CT combined with magnetic resonance imaging (MRI) in diabetic foot bone and vascular changes. Methods A total of 80 patients with diabetic foot admitted to Eastern Theater Air Force Hospital, People's Liberation Army from January, 2021 to December, 2022 were selected as the research objects, and all of them were examined by CT and MRI. The CT and MRI of diabetic foot were observed, and the diagnostic results of single and combined detection for diabetic foot bone and vascular changes were compared. With digital angiography (DSA) as the gold standard, the diagnostic efficacy of single and combined detection for lower extremity arterial diseases was analyzed. Results ①The detection rate of CT combined with MRI was higher than that of CT examination for soft tissue swelling, higher than that of MRI examination for bone end bone destruction, and higher than that of CT and MRI examination for osteoporosis and neuropathic osteoarthropathy, and the difference was statistically significant (P<0.05). ②The results of CT combined with MRI in detecting arterial stenosis of lower limbs are in good agreement with those of DSA (kappa=0.935). ③The sensitivity, accuracy and negative predictive value of 3) CT combined with MRI in the diagnosis of diabetic lower extremity vascular stenosis were higher than those of single detection, and the difference was statistically significant (P<0.05). Conclusion CT combined with MRI can detect the changes of diabetic foot bone and blood vessels more comprehensively and accurately. Compared with single detection, CT combined with MRI has higher sensitivity, accuracy and negative predictive value in the diagnosis of lower extremity arterial stenosis.

Key words: computed tomograghy, magnetic resonance imaging, diabetic foot, bone, vascular changes, diagnostic value