title: [Echographic aspects of blood clots].
abstract: The ultrasonic imaging of blood clots depends on the degree of compactness of the red cells which it contains. When the clot is densely compact, the number of targets struck by the ultrasound beam is large, and major diffusion occurs, providing a visible image. When the clot is less dense, there are insufficient targets and it is not possible to pick-up a reflected signal able to create a visible image. The former situation arises in the case of a recently-formed clot, whereas the latter occurs in ageing clots.
mesh_terms: D055592:Biophysical Phenomena; D001703:Biophysics; D006801:Humans; D013677:Medical Laboratory Science; D008855:Microscopy, Electron, Scanning; D013924:Thrombophlebitis / Q000175:diagnosis* / Q000473:pathology; D013997:Time Factors; D014463:Ultrasonography
vernacular_title: Aspects échographiques des caillots sanguins.