On a CT scan, an acute subdural hemorrhage forms a hyperdense blood collection, whereas a chronic subdural hemorrhage forms a hypodense blood collection.

在CT上，急性硬膜下出血形成高密度区域，慢性硬膜下出血则形成低密度区域。

On a CT scan, an acute subdural hematoma shows up as a hyperdense mass, meaning that it looks more white than the surrounding healthy brain tissue.

在CT上，急性硬膜下血肿为高密度区域：也就是说那块区域比旁边的正常脑组织亮度更高。

An acute-on-chronic bleeding is a combination of hyperdense and hypodense, which is seen in individuals who have a rebleed in the bridging veins after a chronic hematoma has already formed.

慢性区域的急性出血则是两者混合：这可能在慢性血肿已经形成，而桥动脉再次出血的患者中见到。