McArdle C B, Amparo E G, Mirfakhraee M
J Comput Assist Tomogr. 1986 Jan-Feb;10(1):116-9. doi: 10.1097/00004728-198601000-00024.
We report on a case of orbital blow-out fractures involving the medial and inferior walls. In this case conventional multiplanar 8 mm thick sections with magnetic resonance (MR) imaging proved to be more helpful than 1.5 mm axial thin sections with CT in demonstrating the extent of orbital floor herniation of fat. Entrapment of muscle was excluded. Oblique sagittal views were most helpful in evaluating the orbital floor, since the full course of the inferior rectus muscle is seen. Additionally, the optic nerve is seen along its entire length. Masking of intraorbital contents by isodense hemorrhage on CT studies apparently is not a problem with MR imaging if hemorrhage is small or nonacute.
我们报告一例累及眶内侧壁和眶下壁的眼眶爆裂性骨折。在此病例中，常规的8毫米厚多平面磁共振（MR）成像切片在显示眶底脂肪疝出范围方面比1.5毫米轴向CT薄层切片更有帮助。肌肉嵌顿已排除。斜矢状位视图在评估眶底时最有帮助，因为可看到下直肌的全程。此外，还可看到视神经的全长。如果出血较少或不是急性出血，CT检查中等密度出血对眶内内容物的掩盖显然在MR成像中不是问题。
