The ability to combine data from different filling phases helps show complex relationships of vasculature as is shown in this image of the arterial and venous vessels in the liver. Helical CT allows rapid scanning of contrast as it moves through the body. Optimal arterial acquisition is obtained in a cranial to caudal movement and then the venous phase is acquired by reversing the table feed to a caudal to cranial movement. 3D reconstruction was performed to map out the vasculature and then combine the structures to show their relationship to each other. The liver was added, in a translucency, to help define the relationship of the vasculature to the organ.
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