Table 3.

XVI computing time of reconstructions for patients and phantoms with different projection‐number schemes.

	Catphan	R‐H&N	R‐Thoracic	R‐Pelvis	P‐Brain	P‐Lung	P‐Prostate
XVI‐full (seconds)	31.2	23.7	30.0	34.2	33.1	30.3	28.9
XVI‐1/2 (seconds)	18.5	13.6	17.8	18.9	17.9	17.3	16.3
XVI‐1/3 (seconds)	15.3	10.5	13.2	15.0	14.1	14.1	13.6
XVI‐1/4 (seconds)	8.8	5.4	8.1	9.6	9.0	8.2	7.2
XVI‐1/5 (seconds)	6.2	3.0	5.7	8.0	6.1	5.9	5.2
XVI‐1/6 (seconds)	5.3	2.4	4.9	6.0	5.3	5.1	4.8

Abbreviations: $\text{XVI}‐\text{ful}=\mathrm{a}$ full set of projected planar images, $\text{XVI}-1/2=\text{half}$ a set of projected planar images, etc.; $\mathrm{R}‐\mathrm{H}\&\mathrm{N}=\text{head}‐\text{and}‐\text{neck}‐\text{area}$ RANDO phantom; $\mathrm{R}‐\text{Thoracic}=\text{thoracic}‐\text{area}$ RANDO phantom; $\mathrm{R}‐\text{Pelvis}=\text{pelvic}‐\text{area}$ RANDO phantom; $\mathrm{P}‐\text{Brain}=\text{brain}\hspace{0.17em}\text{site};$ $\mathrm{P}‐\text{Lung}=\text{lung}\hspace{0.17em}\text{site};$ $\mathrm{P}‐\text{Prostate}=\text{prostate}$ site.