IEC 63073-1:2020 pdf download

IEC 63073-1:2020 pdf download.Dedicated radionuclide imaging devices – Characteristics and test conditions – Part 1: Cardiac SPECT
1 Scope
This document specifies terminology and test methods for describing the characteristics of SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY (SPECT) systems designed specifically for tomographic cardiac imaging. This includes dedicated systems or general purpose systems with dedicated sub-systems which are not included in the scope of IEC 61 675-2.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61 675-2:201 5, Radionuclide imaging devices – Characteristics and test conditions – Part 2: Gamma cameras for planar, wholebody, and SPECT imaging
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • IEC Electropedia: available at http://www.electropedia.org/ • ISO Online browsing platform: available at http://www.iso.org/obp 3.1 REFERENCE POINT defined 3D position in the FOV of the camera, specified by the manufacturer, or, if not specified by the manufacturer, assumed to be the centre of the FOV of the camera 3.2 BAD PIXEL detector pixel that has been physically or electronically turned off such that gamma rays which interact in that BAD PIXEL are not recorded by the camera 3.3 CARDIAC DETECTOR HEAD assembly of detector components associated with a single COLLIMATOR 3.4 CARDIAC DETECTOR HEAD ELEMENT smallest discrete unit of the CARDIAC DETECTOR HEAD that is able to provide distinct energy, spatial, and timing information about detected photons 3.5 CCFOV central volume of the field of view of a cardiac camera, located within a radius of 7 cm from the REFERENCE POINT 3.6 CUFOV field of view of a cardiac camera for which the summed counts for a LINE SOURCE segment are at least 50 % of the summed counts measured with the camera with the LINE SOURCE segment positioned within the CCFOV 3.7 CARDIAC ORIENTATION image coordinate system specified in reference to the axes of the heart 3.8 SHORT AXIS SA in the CARDIAC ORIENTATION , the plane perpendicular to the long-axis of the heart 3.9 LONG AXIS LA in the CARDIAC ORIENTATION , a plane parallel to the long-axis of the heart 3.1 0 HORIZONTAL LONG AXIS HLA in the CARDIAC ORIENTATION , the LONG AXIS plane that most closely bisects both the left ventricle and the right ventricle of the heart 3.1 1 VERTICAL LONG AXIS VLA in the CARDIAC ORIENTATION , the LONG AXIS plane, that is perpendicular to the HORIZONTAL LONG AXIS 3.1 2 LOW – ENERGY – TAIL RATIO ratio of the counts measured in an ENERGY WINDOW O f width 2 × E FWHM centred at energy E peak – 2 × E FWHM divided by the counts measured in an ENERGY WINDOW O f width 2 × E FWHM centred at an energy of E peak , where E peak is the peak energy of the radioisotope being measured and E FWHM is the energy resolution of the detector
4 Test methods
4.1 General Before the measurements are performed, the tomographic system shall be adjusted by the procedure normally used by the manufacturer for an installed unit and shall not be adjusted specially for the measurement of specific parameters. If any test cannot be carried out exactly as specified in the standard, the reason for the deviation and the exact conditions under which the test was performed shall be stated clearly. Unless otherwise specified, each CARDIAC DETECTOR HEAD in the system shall be characterized by a full data set.Unless otherwise specified, SPECT characterization shall be provided for an acquisition covering the minimal rotation required to obtain a complete set of data (e.g. 1 20° for a three- headed rotating-gantry system). If a rotating-gantry tomograph is specified to operate in a non- circular orbiting mode influencing the performance parameters, test results for the non-circular orbiting mode shall be reported in addition. Unless otherwise specified, measurements are carried out at COUNT RATES not exceeding 40 000 counts per second on each CARDIAC DETECTOR HEAD and not exceeding 1 20 000 counts per second for the system.