EDGE Detector™ is a waterproof dosimeter with a design that nearly eliminates the convolution of high dose gradient regions during profile and depth measurements. It is intended for measurement of fields as small as 5 mm up to 10 x 10 cm.
Output factors measured for CyberKnife® beams at Dmax (6 MV)1
The EDGE Detector agrees with EBT film; even for the 5 mm cone. The ion chambers clearly underestimate the output factors of the small beams.
PDD curves measured by different detectors for a 2 x 2 cm field (6 MV)1
The PDD curve measured by EDGE Detector agrees with those of the ion chambers.
|Field Size||Energy||Penumbra measured (mm) at 10 cm depth|
|(cm x cm)
2 x 2
|10 x 10||6||4.4||5.6|
|Detector type||SunPoint® Diode Detecto||Typical scanning ion chamber|
PinPoint is a registered trademark of PTW Freiburg GmbH, IBA CC01 is a trademark of IBA Dosimetry Corporation. Exradin is a trademark of Standard Imaging Inc.
|Active Detection Area (mm):|| 0.8 x 0.8
0.3 from top
4.72 from end
|Diode Die Location: (mm):|| 2.7 from side Location is indicated by
cross hairs on top of the housing
|Water Depth Equivalent (mm):||0.5|
|Housing Wall Thickness (mm):||0.13 brass|
|External Dimensions (mm):||3.8 x 5.5 x 38|
|Nominal Sensitivity (nC/Gy):||32.0|
|Impedance (Mohm):||>200 at 10 mV reverse bias/td>|
|Cable||3.4 mm dia. x 1.8 m long, triax|
|Cable Connector:||BNC or TNC triax, or adapters upon request|