顧曉清 董芹 金少華
摘要:目的 ?探討應力性骨折診斷的磁共振影像表現,分析磁共振成像(MRI)T1WI序列在膝關節應力性骨折中的應用價值。方法 ?選取2016年1月~2019年12月經臨床及隨訪檢查確診應力性骨折患者34例,行膝關節磁共振檢查35例(1例為雙側),按照磁共振序列分為冠狀位、矢狀位T1WI組和冠狀位T2WI、矢狀位PD壓脂組,分析兩組磁共振差異進行。結果 ?34例患者中膝關節表現為應力性損傷1例,35例應力性損傷均有骨髓水腫信號,其中2例應力性損傷3級,33例應力性損傷4級;兩組骨折線走行與皮質垂直或輕度成角;冠狀位、矢狀位T1WI骨折線顯示率(100.00%)高于冠狀位T2WI、矢狀位PD壓脂組骨折線顯示率(93.94%)。結論 ?MRI能顯示細微的應力性損傷,并能清晰顯示骨折線及軟組織情況,冠狀位或矢狀位T1WI觀察骨折線優于T2WI、PD壓脂序列。
關鍵詞:膝關節;應力性骨折;應力性損傷;磁共振
中圖分類號:R445.2;R684 ? ? ? ? ? ? ? ? ? ? ? ? ? ? 文獻標識碼:A ? ? ? ? ? ? ? ? ? ? ? ? ? ?DOI:10.3969/j.issn.1006-1959.2020.11.054
文章編號:1006-1959(2020)11-0166-02
Abstract:Objective ?To explore the magnetic resonance imaging manifestation of stress fracture diagnosis and analyze the application value of magnetic resonance imaging T1WI sequence in knee stress fracture.Methods ?34 patients with stress fracture diagnosed by clinical and follow-up examination from January 2016 to December 2019 were selected, 35 patients of knee joint magnetic resonance examination (1 case was bilateral), according to the magnetic resonance sequence, it was divided into coronal, sagittal T1WI group and coronal T2WI, sagittal PD lipid pressure group, analysis of the difference between the two groups of magnetic resonance.Results ?Among the 34 patients, the knee showed 1 case of stress injury, 35 cases of stress injury had bone marrow edema signal, 2 cases of stress injury level 3, 33 cases of stress injury level 4; the fracture line of the two groups was perpendicular to the cortex or slightly angled; the fracture rate of the T1WI fracture line in the coronal and sagittal positions (100.00%) was higher than that in the lipid pressure group of the coronary T2WI,the fracture line display rate (93.94%) in the sagittal PD lipid pressure group.Conclusion ?MRI can show subtle stress injury, and can clearly show the fracture line and soft tissue, coronal or sagittal T1WI observation fracture line is better than T2WI, PD lipid sequence.
Key words:Knee joint;Stress fracture;Stress injury;Magnetic resonance
應力性骨折(stress fracture)系指長期、反復的外力作用于骨的某一部位,而引起的慢性骨折。隨著健身體育運動的廣泛開展和保健查體制度的實施,減肥、健身已經成為人們日常活動的一部分。然而不恰當的、過度的運動,必然帶來運動損傷,對骨骼施加外在的應力[1]。應力性骨折占運動醫學就診者的10%以上[2]。常規影像技術如X線攝片、CT檢查不能明確顯示應力性骨折的損傷過程。隨著MRI技術的發展,磁共振被廣泛應用于慢性損傷影像診斷。在診斷應力性骨折中,MRI已經成為確定應力性骨折診斷的金標準[3]。本研究針對臨床診斷的應力性損傷35例,分析其MRI影像分級及損傷特點,膝關節應力性損傷的影像診斷,以及T1WI序列在顯示應力性骨折線中的優勢,現報道如下。