Specifies terminology and test methods for describing the characteristics of Anger type rotational gamma camera single photon emission computed tomographs (SPECT), equipped with parallel hole collimators. As these systems are based on Anger type gamma cameras this part of IEC 61675 shall be used in conjunction with IEC 60789. These systems consist of a gantry system, single or multiple detector heads and a computer system together with acquisition, recording, and display devices. This part of IEC 61675-2 also specifies test conditions for declaring the characteristics of single photon computer tomographs operated in coincidence mode as well as in single photon mode. The test methods specified for coincidence mode are based on the test methods for dedicated PET tomographs as described in IEC 61675-1 to reflect as well as possible the clinical use of coincidence detection. Tests have been modified to reflect the limited sensitivity and count rate characteristics of the single photon computer tomographs operated in coincidence detection mode only when needed. The test methods specified in this part of IEC 61675 have been selected to reflect as much as possible the clinical use of Anger type rotational gamma camera single photon emission computed tomographs (SPECT). It is intended that the test methods be carried out by manufacturers thereby enabling them to describe the characteristics of SPECT systems on a common basis.