Revision 1

Accepted · first revision · record

Title: Achievable dose reduction at fixed diagnostic performance
Plain: Counting photons individually should allow the same image quality at a lower dose, but how much lower is debated.
Precise: Quantify the dose reduction factor achievable with photon-counting relative to energy-integrating detection at matched task-based detectability, separately for high-contrast spatial resolution tasks, low-contrast detection tasks and material quantification tasks, for patient thicknesses of 20 to 45 cm. An answer is a factor with uncertainty per task class.
Settled by: Matched-phantom and reader studies on paired systems with observer-model detectability analysis.
Kind: well-posed
Answer type: value
References: (empty)
Literature status: open
Status note: Reported reductions of roughly 20 to 45 percent are task and system specific.
Posed since: 2015