A method for imaging is providing, including administering a teboroxime species to an adult human subject, administering TI-201-thallous chloride to the subject, performing a teboroxime species SPECT imaging procedure of the teboroxime species on a region of interest (ROI) of the subject, and, after administering the teboroxime species, performing a TI-201-thallous chloride SPECT imaging procedure of the TI-201-thallous chloride on the ROI. Administering the teboroxime species and the TI-201-thallous chloride and performing the teboroxime species and the TI-201-thallous chloride SPECT imaging procedures comprise administering the teboroxime species and the TI-201-thallous chloride and performing the teboroxime species and the TI-201-thallous chloride SPECT imaging procedures during a time period having a duration of no more than 30 minutes. Other embodiments are also described.