30 cm Ionization Chamber for free-in-air measurements

The CT Ion Chamber 30 cm is a cylindrical pencil-shaped ionization chamber specially developed for free-in-air measurements on wide beam CT scanners. It is intended for CTDI measurement when the beam width is 4 cm or wider.

The Chamber can be connected via RTI Chamber Adapter to the Piranha or Cobia to measure CTDI.

It fulfills relevant parts of IEC 61223-2-6, and IEC 60601-2-44.

Art. No: 9730026-00

Ranges with Piranha & Cobia Flex (Chamber Adapter required)

  • Air kerma rate
    0.3 mGycm/s to 3 Gycm/s
  • Inaccuracy
    ±5 % or ±0.03 mGycm/s
  • Connector type
    LEMO triaxial
  • Cable
    2 m, low noise triaxial
  • Active volume
    16 cm³
  • Active length
    300 mm
  • Diameter
    12 mm, 12.6 incl O-rings
  • Typical leakage
    ±20 fA
  • Radiation quality
    70 - 150 kV
  • Sensitivity
    30 mGycm/nC
  • Energy dependence
    ±1 %

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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.