Portable Dosimeter


The Portable Dosimeter is an economical, compact, stand-alone system for radiation dose measurement.

Patient dosimetry measurements are available at the touch of a button and display on the integrated LCD, without the need for software or a computer.  Additionally, the rechargeable battery powered dosimeter allows easy transportation from room-to-room, or hospital-to-hospital.

The Portable Dosimeter supports up to two simultaneous dose points with any of the Best Medical Canada single MOSFETs on standard or high bias setting for optimal dose reproducibility.  An automatic mode is available to continuously sample dose data at a fixed time interval during a session.

After every measurement the dosimetry data is automatically stored to memory for later viewing and can be downloaded to a computer via a USB connection and the PortableDose Connect software.  A simple, menu driven interface allows customization of calibration factors, dose units and operational settings directly on the Portable Dosimeter.  To save you time, a library of default calibration factors is stored in the memory, but the user also has the choice of entering their customized calibration factors.

Radiotherapy clinics can utilize the Portable Dosimeter for patient dose QA, or to measure exposures to regions-at-risk.  In diagnostic radiology, the system is ideal for residual exposure dose measurements, and protocol evaluation.

For one-to-two dose points, the Portable dosimeter is a fast, simple solution for patient dosimetry that can be used for a wide range of applications in radiotherapy and radiology.



  • Stand-alone reader with LCD
  • Portable and compact
  • Quick set-up time
  • Simple menu operation
  • Supports two MOSFET dosimeters
  • Supports all single Best Medical Canada MOSFETs
  • Optional data export via USB and PortableDose Connect software
  • Calibration factor library
  • Long rechargeable battery life
  • Manual measurement mode, or Automatic Sequential mode
  • No software or computer necessary


Radiotherapy Applications

  • In vivo dose - photon or electron
  • Skin entrance and exit dose (TBI)
  • Dmax dose measurements
  • IMRT and Tomotherapy
  • Brachytherapy


Radiology Applications

  • Pediatric CT dose
  • Fluoroscopy dose


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)