extra-axial imagery 轴外成像
extra axial telescope 附加对中望远镜
extra-axial skeleton 外轴骨骼
extra axial image 轴外图象
extra-axial tumor 脑外肿瘤
In the acute phase, subdural hematomas appear as hyperdense, crescent shaped extra-axial collections.
在急性期，硬膜下血肿表现为脑外新月状高密度影。
There are many differences between the intraaxial and extra-axial cavernous hemangiomas in their clinical presentation, operative difficulty and prognosis.
二者在临床表现、手术难度和术后效果差异有显著性。
Objective: to study the imaging features of extra-axial tumors and tumor-like lesions involving both middle and posterior cranial fossae and to make a classification.
目的提高对跨中、后颅窝轴外肿瘤及肿瘤样病变的影像学认识。
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