RTI CT Dose Profiler

A pioneer at measuring CT Dose

The RTI CT Dose Profiler has taken the CT QA to the next level. Because of its revolutionary design, it has transformed the CTDI measurement from being inaccurate due to underestimation of the dose for wide beams to be 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 dose is measured in 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 of the beamwidth. This makes it possible to measure without the drawbacks of traditional CT probes.

With the RTI 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). It is also ideal for measuring point dose and dose rate in the CT beam.

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

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

Art No: 9730013-00

RTI CT Dose Profiler

Specifications with Black Piranha

  • 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

Specifications with Cobia Flex / Sense

  • 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

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Selected partners

PTB is Germany's National Metrology Institute and handles scientific and technical service tasks. With metrology as the PTB's core competence, the organisation's goal is to measure with the highest accuracy and reliability. PTB represents progress and reliability in metrology for the benefit of society, trade and industry, and science.
The ANSI National Accreditation Board (ANAB) is the largest multi-disciplinary accreditation body in North America. ANAB accredits the full spectrum of conformity assessment bodies, including calibration, testing and inspection.
The International Electrotechnical Commission (IEC) is the world’s leading organization that prepares and publishes International Standards for all electrical, electronic and related technologies.
AAPM is a scientific and professional organization, composed of more than 8000 scientists, whose primary goal is the identification and implementation of improvements in patient safety for the medical use of radiation in imaging and radiation therapy.