Fig. 4
From: HYPR4D kernel method on TOF PET data with validations including image-derived input function
(Top) A transaxial slice which contains very high contrast (much greater than 4:1 contrast ratio used for the phantom) in the carotid arteries with a size of 5–7 mm in diameter (see red arrows) and (Bottom) line profile across the carotid arteries in a low count frame (1 min duration) of human [11C]DTBZ scan reconstructed using various methods. The location of the line profile can be seen from the PSF-TOFOSEM panel. Note that a substantially higher peak signal likely induced by noise can be observed from the right carotid artery than that from the left carotid in the PSF-TOFOSEM image, though the ground truth is not known here