TABLE 3

Geometry-Specific Recovery Coefficients

Parameter	Mask	Sphere	Ellipsoid	Δ_S-E	Cortex	Δ_S-C
xSPECT
48 iterations, 1 subset, no filtering
	CAD	0.834	0.829	−0.6	0.634	−23.9
	CT	0.823	0.820	−0.7	0.602	−38.4
Standard reconstruction
	CAD	0.716	0.711	−0.4	0.441	−26.9
	CT	0.728	0.721	−1.0	0.471	−35.3
Flash3D
48 iterations, 1 subset, no filtering
	CAD	0.839	0.834	−0.5	0.643	−23.4
	CT	0.830	0.828	−1.3	0.617	−38.9
Standard reconstruction
	CAD	0.665	0.657	−0.2	0.406	−25.7
	CT	0.657	0.650	−1.1	0.385	−41.5

Δ_S-E = percentage difference between sphere and ellipsoid; Δ_S-C = percentage difference between sphere and cortex.