Fig. 7
Sagittal slices of the PET-based activity distribution \(A_{{{\text{PET}}}}\) a before filtering with a 4 mm FWHM Gaussian kernel, and b after filtering with a 4 mm FWHM Gaussian kernel. The red contour represents the liver volume \(L\) and the blue contour represents the circular ROI where the standard deviation of 90Y activity concentration values was measured. The concentration values are displayed with a range of 0–1.0 MBq/mL