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Technical specifications 22
CEP08027: March 2009
Table 9. Automatic exposure control
GE LightSpeed
VCT
GE LightSpeed
VCT XT
Philips
Brilliance
CT 64
Siemens
SOMATOM
Sensation 64
Siemens
SOMATOM
Definition AS 64
Siemens
SOMATOM
Definition
Dual Source
Toshiba
Aquilion 64
9.1
Automatic mA
control
(AEC / mA
modulation)
software
Yes (3D Dose
Modulation)
Yes (3D Dose
Modulation)
DoseRight CARE Dose 4D CARE Dose 4D CARE Dose 4D
SUREExposure
3D
9.2
- mA adjustment for
patient size
Yes Yes Yes, ACS Yes Yes Yes Yes
9.3
- mA adjustment
along the z-axis
Yes Yes Yes, Z-DOM Yes Yes Yes Yes
9.4
- mA modulation
during rotation
Yes Yes Yes, D-DOM Yes Yes Yes Yes
9.5
Can z-axis and
rotational
modulation be
employed
concurrently?
Yes Yes No Yes Yes Yes Yes
9.6
Method for
prescribing AEC
image quality
Noise Index Noise Index
Reference
image
Noise index
(Reference mAs
set by user)
Noise index
(Reference mAs
set by user)
Noise index
(Reference mAs
set by user)
Standard
deviation (SD)
9.7
Method for system
control of mA
Single scout Single scout
Single or dual
Surview
SPR & online
control
SPR & online
control
SPR & online
control
Using single or
dual scanogram
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