W tomografii stożkowej (cone beam computed tomography – CBCT) wiązka promieniowania w kształcie stożka (stąd nazwa) jest używana do wygenerowania kilkuset zdjęć rentgenowskich podczas obrotu lampy rentgenowskiej wokół głowy pacjenta w zakresie 180 lub 360 stopni. Inna nazwa tej przekrojowej techniki obrazowania to cyfrowa tomografia wolumetryczna, inaczej objętościowa (digital volumetric tomography – DVT lub digital volumetric imaging – DVI). Nazwa ta również ma swoje uzasadnienie, gdyż podczas badania rejestrowana jest pewna objętość danych, w przeciwieństwie do tomografii komputerowej (TK), w której obrazowany jest pełen zakres między wyznaczonymi poziomami górnym i dolnym.

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