The Inveon Multimodality System is a versatile platform for laboratory animal CT, SPECT, and PET studies on a single integrated gantry. The system can be configured for PET-CT, SPECT-CT, PET-SPECT-CT or CT only. The large area CT system has a field of view up to 10 cm x 10 cm and resolution down to 20 microns. The PET system can deliver 1.4mm FWHM spatial resolution, and a maximum field of view of 10cm x 30cm. Whole mouse and rat SPECT studies are possible using gamma rays ranging in energy from 30 to 300 keV, with automated zoom for optimising the field of view.