MRI对臂丛神经损伤的诊断.ppt

Direct signs直接征象： Nerve root or part of the film completely interrupt: the performance of coronal and root cross-section of the spinal nerve discontinuity, or coronal shows the number of affected nerve root with the wire was less than the opposite.神经根影完全中断或部分中断：表现为冠状为及横断面的脊神经前后跟消失或连续性中断，或冠状位示患侧神经根跟丝数明显少于对侧。 Spinal cord shift: coronal cross section can be seen or be pushed to the contralateral or ipsilateral spinal cord.脊髓移位：冠状位或横断面可见脊髓向健侧或患侧移位 Preganglionic injury节前损伤： Indirect signs间接征象： Traumatic meningeal cyst: T2-weighted coronal and cross-section showing high signal in the spinal cord next to the cystic shadow.创伤性脊膜囊肿：冠状及横断面T2加权像中脊髓旁边的高信号囊状影； Deformation of the spinal cord: the spinal cord showed a normal low signal oval contour changes as the lateral spinal cord defects;脊髓变形：表现为脊髓的正常低信号椭圆形轮廓改变，如同脊髓外侧缺损； 3、Black line sign: traumatic meningeal cyst in the area of high signal low signal black belt, often with the wire tips with severe avulsion.黑线征：创伤性脊膜囊肿高信号区中的低信号黑带，常提示伴随严重跟丝撕脱。 Where there are more signs of any direct or indirect signs, we determine that preganglionic brachial plexus injury MRI showed Positive 凡出现以上任何一种直接征象或间接征象，我们即判定臂丛神经节前损伤MRI表现为（+） Normal neural phenotype: there is continuity of the nerve, the signal is normal, nerve bundles clear or slightly fuzzy edges;正常神经表现型：神经的连续性存在，信号正常，神经束边缘清楚或稍模糊； Neurodegenerative type: nerve continuity exists, but in the thickening of nerve on T2-weighted images showed high signal, and T1-weighted image showed equal or lower signal;神经变性型：神经连续性存在，但在T2加权像上神经增粗呈高信号，而T1加权像则呈等或低信号； Postganglionic injury节后损伤： Nerve scar type: nerve continuity of existence, but on the nerve on T1-weighted slightly higher as the signal, T2-weighted images showed equal or slightly lower signal, the signal in scalene inequality;神经疤痕型：神经连续性存在，但在T1加权像上神经稍高信号，T2加权像呈等或稍低信号，中斜角肌信号不均； Nerve disappearing type: discontinuity of nerve, nerve structure disappeared, replaced partly by scar tissue, the signal uneven.神经消失型：神经连续性中断，神经结构消失，局部由不均匀信号之