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Table 1: CereTom protocols used for performing the ACR CT accreditation tests for dose and image quality
Head without Contrast Head with Contrast CT Angiography CT Perfusion
Kilovolt 140 120 120 100
Milliampere 7 7 7 6
Time/rotation (sec) 2 2 1 1
Milliampere second 14 14 7 6
Reconstruction algorithm Smooth Smooth Standard Standard
Axial/helical Axial Axial Helical Axial
Z-axis collimation 1.25 1.25 1.25 1.25
No. of channels 8 8 8 8
Table increment or table speed 10 10 10 N/A
Effective pitch 1 1 1 N/A
Reconstructed scan width 5 5 1.25 10
Note:—N/A indicates not applicable; ACR, American College of Radiology.

	Head without Contrast	Head with Contrast	CT Angiography	CT Perfusion
Kilovolt	140	120	120	100
Milliampere	7	7	7	6
Time/rotation (sec)	2	2	1	1
Milliampere second	14	14	7	6
Reconstruction algorithm	Smooth	Smooth	Standard	Standard
Axial/helical	Axial	Axial	Helical	Axial
Z-axis collimation	1.25	1.25	1.25	1.25
No. of channels	8	8	8	8
Table increment or table speed	10	10	10	N/A
Effective pitch	1	1	1	N/A
Reconstructed scan width	5	5	1.25	10