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Siemens CT User Manual Page 33

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Technical specifications 33
CEP08027: March 2009
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
13.4
Method for contrast
resolution
determination
Statistical Statistical
2 mm: 120 kVp,
350 mAs, 10
mm, 40 mGy
4 mm: 120 kVp,
250 mAs, 10
mm, 27 mGy
5 mm: 120 kVp,
200 mAs, 10
mm, 19 mGy
Observer
method
Observer method
Observer
method
Observer
method
13.5
CT number
accuracy (water)
[+/-HU]
+3 +3 ±4 2 2 2 3
13.6
CT number
uniformity [HU]
Small SFOV: 0
+/- 3.0
Large SFOV: 0
+/- 10.0
GE QA
Phantom (20
cm)
Small SFOV: 0
+/- 3.0
Large SFOV: 0
+/- 10.0
GE QA
Phantom (20
cm)
±3
± 2 (20 cm
Water phantom)
± 2 (20 cm Water
phantom)
± 2 (20 cm
Water phantom)
± 3
13.7
CT number
accuracy (air) [+/-
HU]
Not Specified Not Specified
Info. not
available
10 10 10 3
13.8
CT number
accuracy (bone)
[+/-HU]
Not Specified Not Specified
Acrylic (120 kV)
= 140±15
HU of non-water
materials
depends on kV
HU of non-water
materials depends
on kV
HU of non-water
materials
depends on kV
Info not
available
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