Insights into Imaging

Table 2 Mean reconstruction speed for filtered back projection and iterative CT reconstructions

From: Iterative reconstruction does not substantially delay CT imaging in an emergency setting

	Speed (slices/s)					P value^a			Slices (N)
	FBP	L2	Percentual delay	L4	Percentual delay	FBP vs L2	FBP vs L4	L2 vs L4
CTA ^b	26.7 ± 1.1	18.7 ± 0.5	−30 %	18.0 ± 0.6	−33 %	<0.001	<0.001	0.040	647.8 ± 16.6
	FBP	L1	Percentual delay	L6	Percentual delay	FBP vs L1	FBP vs L6	L1 vs L6
Total body ^c	11.2 ± 0.3	7.1 ± 0.1	−37 %	7.3 ± 0.2	−35 %	<0.001	<0.001	0.237	200.2 ± 6.6
Abdominal ^c	20.7 ± 0.6	15.3 ± 0.3	−26 %	14.9 ± 0.3	−28 %	<0.001	<0.001	0.103	674.1 ± 21.8
Chest ^c	19.9 ± 0.6	14.0 ± 0.3	−30 %	14.2 ± 0.3	−29 %	<0.001	<0.001	0.475	389.6 ± 16.3
Cervical ^c	30.0 ± 0.3	15.5 ± 0.5	−48 %	15.4 ± 0.4	−49 %	<0.001	<0.001	0.683	476.2 ± 16.1
Total trauma CT	20.1 ± 1.6	13.2 ± 0.8	−34 %	13.2 ± 0.6	−34 %	<0.001	<0.001	0.753	1740.1 ± 213.5

FBP filtered back projection, L2 iDose⁴ level 2, L4 iDose⁴ level 4
^aBased on dependent t-test
^bn = 25
^cn = 15

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