![Show Menu](styles/mobile-menu.png)
![Page Background](./../common/page-substrates/page0822.jpg)
DETECTORS FOR MEASUREMENT-2D/3D detectors
Transmission chambers
“
Dolphin”
(IBA)
David
(PTW)
Multiwire i.c.
Delta 4 TD
(Scandidos)
diode matrix
4040 diodes
1mm (disc shaped)
45
Utretch 2016
pp i.c. matrix
1513 i.c.
0.02 cm
3–
5mm center to center
Attenuation 1% (6MV)
Measures dose fluence
MC modelling of detector reponse
LIMITED SPATIAL RESOLUTION
NEED TO REMOVE ELECTRON
CONTAMINATION FROM THE HEAD
nº of wires = nº leaf pairs
Attenuation 5% (6MV)
Measures dose-length product
2.5 x 5 mm spacing
Attenuation 1% (6MV)
Sensitivity decrease:
0.04% per kGy
Dose measurement
accuracy 1.5%
MLC position accuracy
1mm