Status of a collection of acute blood between the arachnoid and the dura, typically (though not always) hyperdense with a crescent shape on CT. Mixed density may be seen if the collection contains unclotted blood, CSF admixture, and/or active extravasation. On MRI, the acute SDH is iso/hypointense on T1 and very hypointense on T2, GRE, and SW-imaging. Note: Please see additional categories below for subacute, chronic, and mixed collections if these better describe the lesion, or if the chronicity/timing is uncertain.

Subdural hematoma acute indicator

Duhaime AC, Gean AD, Haacke EM, Hicks R, Wintermark M, Mukherjee P, Brody D, Latour L, Riedy G; Common Data Elements Neuroimaging Working Group Members, Pediatric Working Group Members. Common data elements in radiologic imaging of traumatic brain injury. Arch Phys Med Rehabil. 2010 Nov;91(11): 1661-6. [DOI: 10.1016/j.apmr.2010.07.238] Haacke, E.M., Duhaime, A.C., Gean, A.D., Riedy, G., Wintermark, M., Mukherjee, P., Brody, D.L., DeGraba, T., Duncan, T.D., and Elovic, E. (2010). Common data elements in radiologic imaging of traumatic brain injury. Journal of Magnetic Resonance Imaging 32, 516-543, DOI: 10.1002/jmri.22259

Choose one. Recommend collection at least during initial medical treatment. Add date stamp for when assessed.

Presence of an acute subdural hematoma.