2025年1月21日 · Acute on chronic subdural hematomas refers to a second episode of acute hemorrhage into a pre-existing chronic subdural hematoma. It typically appears as a hypodense collection with a hematocrit level (located posteriorly).

Graph demonstrating the evolution of the density on CT of intracranial hemorrhage such as a subdural hematoma. A few important facts should be appreciated. hyperacute hematoma (prior to clotting) will be the same density of unclotted blood - it is made up of the same stuff after all.

Case Discussion The key to differentiating chronic subdural hematoma from hygroma is the presence of membranes (commonly seen at autopsy but less well seen on CT scanning)

Subdural hemorrhage (SDH) is a collection of blood between the dura and the arachnoid layers of the meninges. They are common and can occur in any age range, usually related to a history of head trauma.

This CT brain demonstrates an acute left parafalcine subdural hematoma extending into tentorium cerebella.

There is an acute subdural hematoma observed along the superior portion of the tentorium on the right, measuring up to 3.2 mm in depth. No intra-axial collection, mass or focal abnormality …

An example of the value of thorough assesment of CT on both the routine window settings, but also manual review. It is particularly important to manually window (as shown in second set of images) to remove the 'glare' from the bony skull on the brain window settings.

2023年3月23日 · The subdural (blood) window can be used when reviewing a CT brain as it makes intracranial hemorrhage more conspicuous, and may help in the detection of thin acute …

Case of subacute on chronic subdural hemorrhage. Due to the patient's underlying atrophy, there was only a mild degree of mass effect, and certainly no brain herniation.

An extra axial heterogeneous fluid collection at the right frontal and parietal convexity which has crossed the coronal suture. The collection shows areas of mixed density indicating acute on …