The effect of tumour geometry on the quantification accuracy of planar I phantom images.

Introduction: Accurate activity quantification is applied in radiation dosimetry. Planar images are important for quantification of whole-body images, enabling assessment of biodistribution from radionuclide administrations. We evaluated the effect of tumour geometry on quantification accuracy of I planar phantom studies, including various tumour sizes, tumour-liver distances and two tumour-background ratios.