RTI CT Dose Profiler

A pioneer in measuring CT Dose

RTI CT Dose Profiler probe for use with our Piranha, Mako, Cobia FLEX, or Cobia SENSE (with PC com). Used for the evaluation of CT and CBCT systems. The probe fits into standard phantoms used for CTDI measurements.

One-shot accuracy

The RTI CT Dose Profiler has taken CT quality assurance to the next level. Because of its revolutionary design, it has transformed CTDI measurement from being inaccurate, due to underestimation of the dose for wide beams, to becoming more exact. It also has the ability to further analyze the result – all in one shot!

The rapid advancements in CT technology are placing new demands on methods and equipment used for quality assurance. The wide beams of modern CT scanners make it difficult to use existing CT ionization chambers to measure the total dose given to the patient. Using a standard 10 cm CT ionization chamber may result in inaccurate measurements due to the underestimation of the dose profile for wide beams. The CT Dose Profiler was developed to solve this problem.

The following parameters are achieved from a single exposure:

  • CTDI(100)
  • Point Dose
  • CT dose profile
  • CTDI(w)
  • CTDI(vol)
  • DLP
  • Performance of the AEC
  • FWHM (Full Width at Half Maximum of the dose profile)
  • Geometric efficiency

All parameters are presented with high resolution and accuracy.

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The CT Dose Profiler measures without drawbacks

The dose is measured at every point of the X-ray beam and the total dose profile is acquired regardless of how wide the beam is. There is no limitation on the beam width. This makes it possible to measure without the drawbacks of traditional CT probes.

Save time and money

With the CT Dose Profiler, you can avoid more expensive methods that require both preparations before and read-out after each scan (like TLD and X-ray film). The CT Dose Profiler is also ideal for measuring point dose and dose rate in the CT beam.

Fits standard phantoms

The CT Dose Profiler is based on solid-state technology. It is robust and it fits into existing standard phantoms used for CTDI measurements.

  1. Length 210 mm
    Diameter 12.5 mm
    Weight 50 g
    Sensor width 250 μm
    Cable length 4.0 m (13.1 ft)
  2. Dose rate range 67 nGy/s-2.2 Gy/s. 0.46 mR/min - 15000 R/min
    Inaccuracy ±5 % or ±15 nGy/s
    Spatial resolution 0.25 mm
  3. Dose rate 3.3 µGy/s to 3.3 Gy/s. 23 mR/min-23 kR/min
    Inaccuracy ±5 % or ±0.4 µGy/s
    Spatial resolution 0.25 mm


Measure CTDI for Wide Beam and Cone Beam CT! Together with the RTI CT Ion Chamber or CT Dose Profiler, the RTI LoniMover™ is, without a doubt, the easiest and most accurate way to measure CTDI and waveforms for Wide Beam and Cone Beam CT. With the CT Dose Profiler, you will get the FWHM, [...]

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