MOSFET Dosimeters

Best Medical Canada offers three different styles of MOSFET dosimeters as shown in the table below. With each of these dosimeters there are also options that can be selected. All of our dosimeters have the same unique features:

One calibration factor for all photon & electron modalities in the radiotherapy energy range
Isotropic (± 3% or better for 360º)
Active region of 0.2 x 0.2 mm
Permits pinpoint measurement without patient shielding
Dose-rate and temperature independent
Unobtrusive in procedures
Lightweight and flexible
Multiple dosimeter capability with one Reader

Dosimeter	Width of Flex	Length of Flex	Thickness of Flex	Common Use
Standard MOSFET	2.5 mm	200 mm	0.3 mm	Dose verification during radiotherapy treatments; beam QA
microMOSFET	1.0 mm	375 mm	0.3 mm	Fits down a 6Fr catheter for dose verification during HDR brachytherapy procedures
Linear 5ive Array	1.5 mm	460 mm	1.3 mm	Measurement of urethral dose during prostate brachytherapy procedures

Options	Use
High Sensitivity	These dosimeters are made more sensitive to radiation. Standard dosimeters in standard bias (all readers have two bias settings: std and high) have a nominal sensitivity of 1 mV/cGy. High sensitivity dosimeters in standard bias have 3 mV/cGy, while high sensitivity dosimeters used in high bias will yield a nominal sensitivity of 9 mV/cGy.
Reinforcement	Dosimeters can be reinforced to increase strength and durability.
Radiopaque Marker	A marker can be placed on the end of the dosimeters to make them visible during imaging (e.g. CT)

For more information, please see technical note #7 and the linear 5ive array datasheet (PDF).