<prompt> SPECT Stands forSingle Proton Emission Computed TomographySingle Positron Emission Computed TomographySingle Photon Emission Computed TomographySingle Positive Emission Computed Tomography  <response>: SPECT stands for Single Photon Emission Computed Tomography, It uses a 360 degree revolving Gamma Camera and Acquires 3D images using Tc99m labelled radioisotopes like HMPAO Hexamethylpropyleneamine oxime. 