P.DIODES, DOSIMETERS AND ELECTROMETERS
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MOSFET DOSIMETERS

Item #

Description

322-320

Standard MOSFET Dosimeter - 2/Pkg.

322-321

Standard MOSFET Dosimeter - 5/Pkg.

322-322

Standard MOSFET Dosimeter w/Reinforcement - 2/Pkg.

322-323

Standard MOSFET Dosimeter w/Reinforcement - 5/Pkg.

322-324

Standard MOSFET w/ Radiopaque Marker - 2/Pkg.

322-325

Standard MOSFET w/ Radiopaque Marker - 5/Pkg.

322-326

High Sensitivity MOSFET Dosimeter - 2/Pkg.

322-327

High Sensitivity MOSFET Dosimeter - 5/Pkg.

322-328

High Sensitivity MOSFET Dosimeter w/Reinforcement - 2/Pkg.

322-329

High Sensitivity MOSFET Dosimeter w/Reinforcement - 5/Pkg.

322-330

High Sensitivity MOSFET Dosimeter w/Radiopaque Marker - 2/Pkg.

322-331

High Sensitivity MOSFET Dosimeter w/Radiopaque Marker - 5/Pkg.

322-335

MicroMOSFET Dosimeter - 2/Pkg.

322-336

MicroMOSFET Dosimeter - 5/Pkg.

322-337

MicroMOSFET Dosimeter w/Reinforcement- 2/Pkg.

322-338

MicroMOSFET Dosimeter w/Reinforcement- 5/Pkg.

322-339

MicroMOSFET Dosimeter w/Radiopaque Marker - 2/Pkg.

322-340

MicroMOSFET Dosimeter w/Radiopaque Marker - 5/Pkg.

322-341

High Sensitivity MicroMOSFET Dosimeter - 2/Pkg

322-342

High Sensitivity MicroMOSFET Dosimeter - 5/Pkg

322-343

High Sensitivity MicroMOSFET Dosimeter w/Reinforcement - 2/Pkg

322-344

High Sensitivity MicroMOSFET Dosimeter w/Reinforcement - 5/Pkg

322-345

High Sensitivity MicroMOSFET Dosimeter w/Radiopaque - 2/Pkg

322-346

High Sensitivity MicroMOSFET Dosimeter w/Radiopaque - 5/Pkg

• One calibration factor for all photon and electron modalities in the radiotherapy energy range
• Isotropic (±3% or better for 360°)
• 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.

Reinforced MOSFET Dosimeter -Now Standard
Reinforcing the MOSFET dosimeter increases its durability during procedures that may cause high stress to the dosimeter, A thin layer of protective plastic coating is added to the tip of the dosimeter, which hardens, strengthens and protects the sensor.

High Sensitivity MOSFET Dosimeter
The high sensitivity MOSFETs are three times as sensitive as the standard MOSFETs and help to maintain reproducibility at low doses. The high sensitivity MOSFETs are ideal for scatter doses to regions at risk, or radiology dose measurements.

microMOSFET Dosimeter
With a width of 1.0 mm and an extra long 375 mm flex, the microMOSFET dosimeter is small enough and long enough for use inside a 6 Fr catheter.

Radio-opaque Marker for Visualization
A tiny tungsten radio-opaque ,marker is added to the tip of the MOSFET dosimeter with OBI, or other imaging procedures. Additionally, these dosimeters are fully coated with a special plastic material that makes them more durable for repeated insertions inside a catheter.

Plain Dosimeter
The plain MOSFET dosimeter does not have the protective plastic coating. Customers with customized phantoms with tight tolerances may require the plain dosimeter otherwise we recommend the reinforced

Linear 5ive Array
The Linear 5ive Array incorporates five (5) sensors separated 20 mm, center to center, on one 460 mm flex with a tungsten radio-opaque marker at the tip. the length of the dosimeter flex is fully coated with a special plastic material for greater durability during catheter insertions.

Flex
Dimensions*

Standard
MOSFETS

micro
MOSFETS

Linear 5ive Array

Width of Flex

2.5 mm

1.0 mm

1.5 mm

Thickness of Flex
(flat part of flex)

0.3 mm

0.3 mm

1.3 mm

Length of Flex
(from end of gray cable)

200 mm

375 mm

460 mm

Thickness of Bulb

1.3 mm

1.0 mm

1.4 mm

Length of Bulb

8.0 mm

3.5 mm

5.0 mm

Distance to Center of Chip
(from end of bulb)

4.0 mm

1.75 mm

2.5 mm

Common Use

Dose verification during radiotherapy treatments; beam QA

Fits down a 6Fr catheter for dose verification during HDR procedures

Measurement of urethral dose during prostate brachy-therapy

* Measurements listed above are average values and are meant to serve as a guide for the use of Best Medical Canada MOSFET dosimeters. For phantom use and tolerances, please contact Best Medical Canada directly for more detailed information.

Radiotherapy Applications**

Typical Applications

Radiotherapy Dose

Recommended Dosimeter

Recommended Bias Supply

Scatter Dose / Research

1 to 20 cGy

High Sensitivity Dosimeter

High Setting

Central / Scatter Doses

20 to 100 cGy

Standard Dosimeter

High Setting

TBI / Central Dose

> 100 cGy

Standard Dosimeter

Standard Setting

HDR Brachytherapy

> 20 cGy

Standard Linear 5ive Array

Standard Setting

LDR Brachytherapy

1 to 20 cGy

High / Extreme Sensitivity Linear 5ive Array

High Setting

** Pertains to the standard MOSFET dosimeter, the microMOSFET dosimeter, and the Linear 5ive Array Dosimeter.

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