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Medical and Other Dose Measurement Applications with OSL

OSL provides a unique method of measuring radiation doses in the medical environment and other areas where dose measurement is needed. Single element microStarTM OSL dosimeters are small, thin, lightweight and easy to use. Consequently, microStar OSL dosimeters have low radio-opacity so they are not likely to obscure diagnostic information in medical images.

More importantly, microStar single dot dosimeters are very easy to read. The reading process is as easy as 1, 2, 3—

1. Place the dosimeter element in the drawer
2. Turn the knob
3. Read the dose from the display

Other important points about the OSL dosimeter system —

  • No heating controls for the reader
  • No nitrogen required
  • No glow curve analysis required
  • No annealing oven
  • Each dosimeter is individually identified by its unique serial number
  • Low power requirements mean the microStar can be used any where, e.g., it can be operated from the (cigarette lighter) power supply of an automobile or other vehicle

  • microStarTM Dosimetry System Specifications and Information

Landauer makes OSL radiation dosimetry simple and easy. Doses can be measured by a radiation therapist, radiological technologist, or technician (with appropriate training and oversight by a medical or health physicist) so there is no need for a physicist to spend hours annealing, calibrating, and reading dosimeters.


OSL dosimetry is cost effective. The Landauer microStar dosimetry system is much less expensive than readers utilizing other technologies. In addition, the dosimeters are priced very competitively and can be used as a one-time use dosimeter.

Landauer's OSL dosimeter readers remove only a small portion of the signal (about 0.2% each time the dosimeter is read. This means that a dosimeter can easily be re-read if there is a question about the validity of a particular reading. Alternatively, a single dosimeter can be used throughout the course of treatment with readings taken after every treatment indicating the cumulative dose received by the patient.

Al2O3:C is an inherently linear material. In the microStar format, the measurement range is 50 µGy (5 mrad) to 10 Gy (1,000 rad). Its energy response is within ± 10% over the diagnostic energy range and within ± 5% in the therapeutic energy range.



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