论文部分内容阅读
目的 研究应用多层螺旋CT在同一幅图像上显示双侧面神经管全貌的方法。方法用多层螺旋CT对 6 0个病人的颞骨行高分辨率CT轴面扫描。扫描参数 :12 0kV ,2 0 0～ 2 5 0mAs ,准直0 .5mm ,螺距 0 .875 ,扫描时间 0 .75s/周 ,矩阵 5 12× 5 12。重建间隔 0 .1～ 0 .2mm ,重建矩阵 10 2 4×10 2 4。用PhilipsMx80 0 0工作站 ,分别在轴面及多平面重建 (MPR)的冠状面、矢状面图像上行面神经管的曲面重建 (CPR)。轴面上的面神经管重建时 ,使用曲面重建功能绘制 1条沿一侧面神经管走行的CPR参考线 ;自内耳道起始部开始 ,沿着面神经管的走行 ,参照矢状面和冠状面面神经管的位置 ,在各层面上不断校正CPR参考线 ,使之位于面神经管的中央 ,直至茎乳孔 ,即可获得一侧面神经管全貌的曲面重建图 ;并将CPR参考线自内耳道起始端延伸至对侧 ,依上述步骤校正此线 ,即可在同一幅图像上获得双侧面神经管的全貌。在MPR的冠状面及矢状面上行单侧或双侧面神经管的CPR ,方法与轴面上的CPR相似。结果 6 0例中的 5 6例轴面及MPR冠状面上CPR图像能清晰显示单侧或双侧面神经管的全貌 ;MPR的矢状面上同时行双侧面神经管的曲面重建 ,结果不满意 ,往往一侧显示清晰 ,另一侧只能显示部分面神经管 ,因此 ,只能左右侧分别重建显示。 4例面?
Objective To study the method of displaying bilateral bilateral neural tube images on the same image by using multi-slice spiral CT. Methods The temporal bone of 60 patients was scanned by high resolution CT axial plane with multi-slice spiral CT. Scanning parameters: 12 0 kV, 200 ~ 250 mAs, collimation 0.5 mm, pitch 0 .875, scan time 0. 75 s / week, matrix 5 12 × 5 12. Reconstruction interval 0 .1 ~ 0 .2 mm, reconstruction matrix 10 2 4 × 10 2 4. The Philips Mx8000 workstation was used to reconstruct the CPR of the facial nerve canal in the coronal and sagittal images of axial and multiplanar reconstruction (MPR). When reconstructing the facial nerve tube on the axial plane, a curved surface reconstruction function is used to draw a CPR reference line running along a facial nerve canal. Starting from the beginning of the internal auditory meatus, along the facial nerve tube, the sagittal and coronal facial nerve The position of the tube, at all levels continue to correct the CPR reference line, so that it is located in the center of the facial nerve tube, until the stylomastoid hole, you can get a panoramic view of the facial nerve tube reconstruction map; and CPR reference line from the beginning of the ear canal Extend to the contralateral, according to the above steps to correct this line, you can get the same picture double-sided neural tube. CPR on the coronal and sagittal planes of the MPR unilaterally or bilaterally is similar to CPR on the axial plane. Results 56 cases of 60 cases of axial and MPR coronal CPR images can clearly show the whole unilateral or bilateral neural tube; MPR sagittal plane at the same time bilateral bilateral neural tube surface reconstruction, the results are not satisfied , Often shows a clear side, the other side can only show part of facial nerve tube, therefore, can only be reconstructed left and right side of the display. 4 cases?