Abstract

Info

Title:: Diagnostic value of fat suppression MRI for occult fractures of the knee

Author(s):: DONG Wanting; WANG Haodong; LUO Hua; PAN Xiaowen; YI Xuebing; Department of Medical Imaging, Sichuan Province Orthopaedic Hospital, Chengdu 610000, China

Keywords:: Keywords: magnetic resonance imaging fat suppression technique occult fracture of the knee

Abstract:: Abstract: Objective To explore the value of fat suppression MRI in the diagnosis of occult fractures of the knee. Methods The clinical data of 118 patients highly suspected of occult fractures of the knee were analyzed retrospectively. All patients underwent CT and fat suppression MRI examinations, and were confirmed by surgery or arthroscopy. The diagnostic accuracies of CT and MRI were analyzed. Results The detection rates of ligament injury, meniscus injury and joint effusion using MRI were higher than those using CT (25.42% vs 6.78%, 34.75% vs 15.25% and 27.14% vs 12.71% all P<0.05). The detection rates of fracture collapse and horizontal dislocation using MRI were 61.02% and 58.47%, higher than those using CT (40.68% and 38.14%), and the detection rates of grade 1 and 2 fracture collapse and horizontal dislocation were significantly higher than those using CT (P<0.05). With the results of surgery or arthroscopy as the golden standard, MRI and CT had sensitivity of 95.60% vs 78.02% and accuracy of 92.37% vs 81.36% for diagnosing occult fractures of the knee (P<0.05). Conclusion Compared with CT, MRI has a high sensitivity and accuracy for diagnosing occult fractures of the knee, and is advantageous in detecting small fracture collapse and horizontal dislocation.