head CT幻灯片.pptVIP

yan chen KEY WORDS emergency medicine 急诊医学；应急医学 mass effect 占位效应 intracranial lesions [,?ntr?kren??l] 颅内病变 crescent-shaped [kres?nt] 新月形的；逐渐增加的 lenticular/biconvex [lent?kj?l?]/ [ba?k?nveks] 两面凸的 the dense bone 致密骨 cranium [kreinj?m] 颅；头盖 cross-sectional anatomy [?n?t?m?] 断层解剖 CSF（Cerebrospinal Fluid ）[,ser?br? ? spa?n ? l][flu??d] paranasal sinusitis [,p?r?neiz?l] [,sa?n?sa?t?s] 鼻窦炎 orbits 眼眶 KEY WORDS basal cisterns [s?st?n] 基底池 cortical sulci/fissures [k?:tik?l] 皮质沟/裂 cerebral convexity [k?nveks?t?] 大脑凸面 neurological deficit [def?s?t; di?-] 神经功能缺损 slit-like [slit] 裂隙状 petechial [p?tik??l] 瘀点的；瘀斑的 lateral skull topogram [?t?p??ɡr?m] 头颅侧位定位相 frontal lobe [fr?nt?l] 大脑额叶 temporal lobe [t?mp?r?l] 颞叶 occipital lobe [?ksipit?l] 枕叶 parietal lobe [p?ra??t ? l] 顶叶 KEY WORDS Computed tomography CT is the most useful neuroimaging study in emergency medicine practice because it readily detects acute blood collections and intracranial lesions causing mass effect. These are the most important immediate considerations in patients presenting with head trauma, headache, or stroke. CRANIAL CT TECHNIQUE THREE DISPLAY WINDOWS A On the brain window image, the crescent-shaped subdural hematoma has the same white appearance as the skull. level +30, width 80 B On the subdural window image, the blood collection is readily distinguished from skull. level +25, width 250 Many intracranial lesions produce CT findings that can be identified ,if we have enough knowledge of normal CT anatomy as well as the CT manifestations of various intracranial disorders. The disorders can be epidural hematoma,subdural h-ematoma,traumatic subarachnoid hemorrhage,intracere-bral hematomas,diffuse axonal injury,tentorial SDH,linear skull fracture,depressed skull fracture ,etc. A SYSTEMATIC APPROACH A TARGETED APPROACH Stroke—Examine region of neurological deficit for blood, edema, or masses Trauma—Blood extra-axial, intraparenchymal , cerebral edema,fractures, pneumocephalus, scalp swellin