The dura has been reflected back (with a small portion visible at the lower right) to reveal a subdural hematoma. Such a blood clot is usually the result of trauma with tearing of the bridging veins.

• 硬脑膜折起(右下可见小部分硬脑膜)显示硬膜下血肿。这种血块通常是桥静脉撕裂造成的。