74.34歲男性,車禍外傷,劇烈頭痛,意識混亂,CT影像圖A可見左臉頰腫脹,根據圖B箭頭所指的是:
(A)contusion parenchymal hemorrhage (B)traumatic subarachnoid hemorrhage(SAH) (C)thin layer acute subdural hematoma(SDH) (D)traumatic pneumoencephalus