Philips Azurion - Multiphase Settings; Shutters and Wedges

C12/F12 System
Dose r
ao (%) 100 110 130 155 185
Field Size (cm) 30 27 22 19 15
X-ray Protocol Paent Type Ref. AK (mGy/img)
Cerebral Cerebral 2 fps Low Default 1.021 1.132 1.358 1.650 2.015
The measurement c
ondions used are in accordance with Reference Air Kerma Measurement
Setup (page 311).
The following example gives the reference air kerma values for a vascular procedure for dierent eld
size values on F15 systems.
F15 System
Dose r
ao (%) 100 110 130 150 180 215 260
Field Size (cm) 39 37 31 27 22 19 15
X-ray Protocol Paent Type Ref. AK (mGy/img)
Head Clarity 2 fps Low Default 0.590 0.649 0.780 0.914 1.112 1.357 1.672
The measurement c
ondions used are in accordance with Reference Air Kerma Measurement
Setup (page 311).
The following example gives the reference air kerma values for a vascular procedure for dierent eld
size values on C20/F20 systems.
C20/F20 System
Dose r
ao (%) 100 130 145 170 200 240 280 330
Field Size (cm) 48 42 37 31 27 22 19 15
X-ray Protocol Paent Type Ref. AK (mGy/img)
Cere-
bral
Cere-
bral
2 fps
Low
Default 0.463 0.605 0.677 0.798 0.946 1.149 1.358 1.620
The measurement c
ondions used are in accordance with Reference Air Kerma Measurement
Setup (page 311).
NOTE The dose rao numbers may dier per procedure and per uoroscopy avor.
Mulphase Sengs
The vascular exposure procedure contains the default duraon and frame speed per phase.
For these procedures it is possible to manually change the frame speed and duraon per phase. For
more informaon about changing frame speed and duraon, see Changing Mulphase Acquision
Sengs (page 97).
The reference air kerma is dened per image and will not change at dierent frame speeds. However,
the cumulave skin dose is directly related to the frame speed and so, if the frame speed in one phase
is reduced by 50%, the cumulave skin dose in that phase is also reduced by 50%.
Conclusion: Consider lowering the frame speed, if possible.
Shuers and Wedges
When you apply proper collimaon, direct irradiaon of body parts not needed for the procedure is
prevented.
This reduces the dose area product and the sta dose, although the reference air kerma and the (peak)
skin dose are not inuenced.
In general, for example, 25% collimaon of the irradiated area will reduce the dose area product by
25%.
Technical Informaon System Sengs Inuencing the Radiaon Dose
Azurion Release 1.2 Ins
trucons for Use 292 Philips Healthcare 4522 203 52421