Check	Description
Frame durations	Check that the scanner has accurately recorded scan start times and frame durations (which are critical for the modeling)
Saturation	Check count behavior for signs of saturation as bolus first passes through heart
Blood peak presence	Check for clear blood peak. If missing, the scanner was probably started too late after the injection
Blood peak width	A blood peak width of 20–70 seconds is expected. If the width is outside this range, the injection was infiltrated or there were other problems with the injection
Tissue curve tails	The tails of the tissue curves should be flat since the tracer is irreversibly trapped and the activity rapidly clears from the blood. Rising tissue curves are typical of gradual patient or cardiac drifting
Blood curve tail	The tail of the blood curve should be low and flat following similar reasoning from the tissue curves
Tissue curve discontinuities	Discontinuities (steps, peaks, or dips) are signs of likely patient motion
Modeled blood	The modeled blood curve should be flat and near zero after the bolus passes through the heart. If otherwise, it is a sign of improper spillover correction, or uncorrected cardiac movement during the study