Cerebral venous blood takes different pathways depending on body position. Hence, 3D MR imaging of the cervical region at different body inclination angles might give valuable information in patients whose diagnosis relies on imaging of venous pathways. In this study was shown that using a time of flight method the internal jugular veins could be segmented by applying a threshold followed by manual cropping. Subsequently, it was shown that their diameter decreases as the rotational angle is increased towards the upright position. The amount of decrease might give clinically relevant information about the state of the veins and cranial drainage.