Table 2 Parameters used in the marker-based post-scan parameter derivation

Source location

s = (s_x, SOD, s_z)

Detector location

d = (d_x, d_y, d_z)

Detector tilt

θ, ϕ

Detector in-plane rotation

η

Detector pixel size

δ

Projection angles

A = {α₀, …, α_n−1}

Set of all system parameters

Θ = {s, d, θ, ϕ, η, δ, A}

Marker positions

m₁, …, m_N