QPS (Quantitative Perfusion SPECT) is an interactive application for the automatic segmentation,
quantification, analysis & display of myocardial perfusion SPECT.
Improved Perfusion Quantification, or PFQ
A more accurate quantitative perfusion analysis is the key advantage of PFQ,
the improved quantification module of QPS. This software provides as its
primary nuclear variable the Total Perfusion Deficit (TPD), reflecting the extent
and severity of the overall perfusion defect, and correlating strongly with the
widely used visual variables of SSS or % myocardium abnormal. PFQ has been
shown to be superior to the previous quantitative algorithm of QPS and even
to be able to outperform expert visual analysis, despite the fact that the experts
take into account information from the patient’s history and stress test results
in forming their final interpretation (Slomka, et al J Nucl Cardiol 2005;12:66-77).
If this is accomplished in the expert laboratory, the importance of PFQ in less
experienced laboratories is likely to be even more significant. PFQ also allows a
greatly simplified addition of new perfusion databases.