Philips Azurion - Image Noise

The phantom provides the means for placement of the dosimeter(s) along its axis of r
otaon and along
a line parallel to the axis of rotaon, 1.0 cm from the outer surface and within the phantom.
Dose Measurements
Actual dose values were measured with a 10 cm long, pencil-shaped ionizaon chamber.
CTDI Denion
The weighted CTDI dose is calculated with the formula:
CTDI
W
= (
2
/
3
(P
1
+ P
2
+ P
3
+ P
4
) / 4 +
1
/
3
P
5
) / 10
where P
i
is the dose measured with the measurement device in posion i.
Figure 142 Dose measur
ement posions for head (le) and body (right) applicaon areas
Image Noise
Non-staonarity of contrast resoluon was evaluated through 3D reconstrucons of a Catphan 500
phantom. Visual inspecon of this image and similar images, shows that non-staonarity of contrast
resoluon is negligible.
Technical In
formaon Protecon Against Stray Radiaon
Azurion Release 1.2 Ins
trucons for Use 319 Philips Healthcare 4522 203 52421