Table 1.

Technical parameter lists of scan for phantoms and patients.

	Catphan	R‐H&N	R‐Thoracic	R‐Pelvis	P‐Brain	P‐Lung	P‐Prostate
Energy (kVp)	120	100	120	120	100	120	120
Tube Current (mA)	30	10	40	40	10	40	40
Duration per Pulse (millisecond)	40	10	25	25	10	25	40
Projected Image Number	652	362	652	652	362	652	652
Scan Time (minutes)	2.0	2.0	2.0	2.0	2.0	2.0	2.0
Start Angle–end Angle (degree)	183–180	260–100	183–180	183–180	260–100	183–180	183–180
Collimator Type	S20	S20	M20	M20	S20	M20	M10

Abbreviations: $\text{kVp}=\text{kilovolta}\hspace{0.17em}\text{peak};$ $\text{mA}=\text{milli}‐\text{Amper}$ $\mathrm{R}‐\mathrm{H}\&\mathrm{N}=\text{head}‐\text{and}‐\text{neck}‐\text{area}$ RANDO phantom; $\mathrm{R}‐\text{Thoracic}=\text{thoracic}‐\text{area}$ RANDO phantom; $\mathrm{R}‐\text{Pelvis}=\text{pelvic}‐\text{area}$ RANDO phantom; P‐$\text{Brain}=\text{brain}\hspace{0.17em}\text{site};$ P‐$\text{Lung}=\text{lung}\hspace{0.17em}\text{site};$ P‐$\text{Prostate}=\text{prostate}\hspace{0.17em}\text{site};$ $\mathrm{S}20=\text{small}$ size collimator with 20 cm width; $\mathrm{M}10=\text{medium}$ size collimator with 10 cm width; $\mathrm{M}20=\text{medium}$ size collimator with 20 cm width.