RTI T20 Dose Probe

Use anywhere in the X-ray field


The RTI T20 Dose Probe is a solid-state detector dedicated to measurements on Rad/Fluoro systems when it is crucial that the detector itself does not have any effect on the system output or disturb the X-ray beam.

It was developed for measurements of the patient entrance dose (skin dose) and the maximum dose rate in the radiographic and fluoroscopic field. Despite its small size, the RTI T20 Dose Detector is protected from picking up backscatter.


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Place it anywhere!

The RTI T20 Dose Probe can be placed anywhere in the X-ray field in contrast to many other detectors. The RTI Dose Probe, for instance, is small but not small enough in all situations. It still has to be placed outside the active area to avoid affecting the feedback of the system.


Independent and sensitive

The RTI T20 can connect to either Piranha, Cobia FLEX, or Cobia SENSE, and has a built-in correction filter that allows the detector to self-compensate for different beam energies. Therefore it has a flat energy response in the radiographic range with no need for correction factors. The RTI dose detector gives about five times higher sensitivity than a typical ion chamber.

IEC Directive

The RTI T20 Dose Probe fulfills the IEC directive for dose detectors regarding energy independence, measuring range, and angular dependency for RQR50–150 kV.

  1. Ranges 0.7 nGy - 10 kGy
    0.08 μR - 1 MR
    27 nGy/s - 500 m Gy/s
    3 μR/s - 57 R/s
    Inaccuracy ±5 % (RQR 50 - 150 kV)
    Energy dependence Less than ±5 % for RQR 50 - 150 kV
    Angular dependence Less than ±2 % for incident angles less than 10 degrees.
    Typical sensitivity 8 μC/Gy
    Connector Piranha external connector
    Size of detector house 26 x 5 mm²
    Length 318 mm (rod 280 mm + detector 26 mm + back mount 12 mm)
    Trig modes After exposure, Continous, Timed, and Free Run