PET Perfusion Databases
This module allows normal-limit based quantification of Rb-82 and N-13-ammonia perfusion PET images using databases created from scans of low-likelihood patients. Segmental stress and rest perfusion scores can be obtained using the 17- or 20- segment models. Attenuation corrected PET/CT Rb-82 and N-13-ammonia normal limits are provided with QPET. These normal PET/CT databases have separate stress and rest files and combine data from both genders (no differences after attenuation correction).
Transverse Datasets Processing
QPET includes native support for PET transverse data. The QPS and QGS contour algorithms have been optimized specifically for transverse PET data, providing a more reliable approach to identifying the heart and valve plane. This also includes an enhanced manual mode allowing reorienting of the transverse data. Once transverse data has been processed, it can be instantly reoriented (obliqued) to standard short axis views, providing the interpreting physician a familiar view of the data. When SPECT images are loaded (even if QPET is enabled), QPS and QGS automatically recognize this and continue with the classic algorithms.
This module performs the quantitative assessment of "hibernating myocardium" by calculation of relative regional changes between perfusion and viability in areas hypo-perfused on rest. Scar and mismatch parameters are reported as a percentage of the left ventricle. Extent and severity of scar and mismatch can be displayed in polar map coordinates or as a 3D surface display. The program allows automatic scoring of scar using the 17- or 20-segment model. Simultaneous display of stress, rest and viability quantification results is possible. Stress images are not required for the quantification of scar and mismatch.