Table 3. Numerical simulation parameters.

Parameters	Q = 5	Q = 7
Distance from source to rotation center (mm)	577	640
Distance from source to detector (mm)	977	1080
Diameter of field of view (mm)	60	60
Efficient detector array length (mm)	204.8	204.8
Detector pixel size (mm)	0.8	0.8
Interval angle between two adjacent projection views	$\pi /250$	$\pi /350$
Reconstructed image size (pixel)	256$\times$256	256$\times$256