The A17 is tailored for MV and tomotherapy applications such as weekly QA checks or patient dose verification with phantoms and water tanks. It has excellent response uniformity over the chamber length with variation less than ±1.5%.
The A101 performs the measurements necessary for calculating the CTDI as described in TG-74. It has excellent response uniformity over the chamber length with variation less then ±3%.
|Exradin A101||Exradin A17|
|Collecting Volume||4.54 cm3||1.91 cm3|
|Outside Diameter of Shell||10.0 mm||12.7 mm|
|Inside Diameter of Shell||8.0 mm||6.0 mm|
|Shell Wall Thickness||1.0 mm||3.3 mm|
|Collector Diameter||2.5 mm||2.5 mm|
|Collector Length||100 mm||80 mm|
|Shell, Collector, and Guard Material||A||A|
|Nominal Air Kerma Calibration Factor||6.2E+6Gy/C||1.5E+7Gy/C|
|Nominal Leakage||+/-10 fA||+/-10 fA|
|Maximum Polarizing Voltage||1000 VDC||1000 VDC|
|Included Accessory||PMMA sleeve to adapt chamber for 0.50" (12.7mm) phantom holes||Integral 60Co Buildup in shell wall|