Siemens SOMATOM Manual&Nbsp;

Dose Information
49
How does CARE Dose 4D work?
CARE Dose 4D combines two types of tube current
modulation:
1) Axial tube current modulation:
Based on a single Topogram (a.p. or lateral) the atten-
uation profile along the patient’s long axis is measured
in direction of the projection and estimated for the per-
pendicular direction by a sophisticated algorithm.
Example of lateral and a.p. attenuation profile evalu-
ated from an a.p. Topogram.
Based on these attenuation profiles, axial tube current
profiles (lateral and a.p.) and the resulting eff. mAs for
every table position are calculated. The correlation
between attenuation and tube current is defined by an
analytical function which results in an optimum dose
and image noise in every slice of the scan.
Attenuation (log)
Lateral
Scan Range

Siemens SOMATOM Specifications

General

Category	CT Scanner
Rotation Time	0.25 seconds
Tube Voltage	70-150 kV
Bore Size	78 cm
Max Table Load	250 kg
Gantry Aperture	78 cm
Table Weight Capacity	250 kg
X-ray Tube Voltage	70-150 kV
Scan Time per Rotation	0.25 seconds
Software	Syngo
Connectivity	DICOM