Abstrait
La tomodensitométrie X ou scanographie est une méthode de diagnostic radiologique tomographique permettant d’obtenir des coupes transversales reconstruites à partir de la mesure du coefficient d’atténuation du faisceau de rayons X au cours de la traversée d’un segment du corps. Le coefficient d’atténuation est exprimé en unités arbitraires: unités Hounsfield (UH). Par convention, le coefficient d’atténuation de l’eau est 0 UH et celui de l’air — 1 000 UH. Le coefficient d’atténuation des composants du contenu de la boîte crânienne est compris entre 12 UH (liquide céphalo-rachidien) et 60 UH (sang) pour une valeur moyenne de 33,5 UH chez le sujet sain.
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Lescot, T., Degos, V., Galanaud, D., Abdennour, L., Puybasset, L. (2007). Apport de l’imagerie neurologique dans la prise en charge du patient traumatisé crânien grave. In: Bruder, N., Ravussin, P., Bissonnette, B. (eds) La réanimation neurochirurgicale. Le point sur …. Springer, Paris. https://doi.org/10.1007/978-2-287-68199-8_10
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DOI: https://doi.org/10.1007/978-2-287-68199-8_10
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