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Semiflex 3D MR Ion Chamber 31024

Ready for use MR conditional chamber.

The 31024 Semiflex 3D MR chamber is ideal for dose measurements in an MR environment encountered e.g. at MR-linacs such as MRidian Viewray and ELEKTA Unity as well as for dose measurements in standard fields up to 40 x 40 cm2. Relative dose distributions can be measured with high spatial resolution in any direction. The waterproof, guarded chamber can be used in air, solid state phantoms and in water.

Key Features

  • Particularly suited for End2End testing of gating algorithm
  • MR conditional (ASTM F2052-15 & ASTM F2213-17)
  • Optimized MR imaging feature
  • Carefree and safe use in an MR environment
  • Same specifications as T31021
  • Can be used with s.o. MRidian Viewray and ELEKTA Unity

 

More MR Solutions

  • Vented, waterproof, fully guarded - the ideal chamber for relative and reference dosimetry measurements in water, air or solid state phantoms
  • True 3D geometry - uniform response in any direction
  • Unique design - fast, accurate scanning in in-plane and cross-plane directions without tank rotation or change of detector setup
  • Easy horizontal or vertical mounting for high-resolution measurements in both radial and axial orientations
  • Reference-class ionization chamber with exceptional dosimetric characteristics - suitable for reference dosimetry following standard dosimetry protocols, e.g., IAEA TRS-398, AAPM TG-51
  • Small size (0.07 cm³), high spatial resolution - perfect for measurements in small and FFF fields down to a field size of 2.5 cm x 2.5 cm
  • Radioactive check device optionally available
Suitable for photon and electron dosimetry in multiple applications
  • Linac acceptance testing
  • TPS beam data commissioning
  • Clinical reference dosimetry
  • Point dose measurements
The new reference class

Semiflex 3D meets and exceeds the performance requirements of a reference-class ionization chamber as laid out in AAPM TG-51 and IEC 60731:

  • Minimal polarity effect (< 0.4 % correction, < 0.5 % maximum variation)
  • Extremely low volume effect (est. ≤ 0.05 % correction in FFF field)
  • Excellent chamber settling (< 0.3 %)
  • Very low post-irradiation leakage - far below IEC 60731 requirements
  • Significantly reduced cable effects (< 200 fC / (Gy * cm))
  • Minimal chamber-to-chamber variation - reliable kQ and kS values

Technical Specifications

Type No. 31024
Design: vented cylindrical ionization chamber, waterproof, fully guarded
Measured quantities: absorbed dose to water, air kerma, exposure
Nominal sensitive volume: 0.07 cm³,
radius 2.4 mm, length 4.8 mm
Reference point: on chamber axis, 3.45 mm from chamber tip
Nominal response: 2 nC/Gy
Chamber voltage: 400 V nominal
± 500 V maximal
Radiation quality: Co-60 ... 50 MV photons
(9 ... 45) MeV electrons
Field size: (2.5 x 2.5) cm² ... (40 x 40) cm²
(3.0 x 3.0) cm² ... (40 x 40) cm²
≥ 18 MV
Connectors: TNC

Related Downloads

Note
RUBY Applications at ELEKTA UNITY ( 2 MB )
Brochure
MR-RT Products ( 2 MB )
Catalog
Detectors Catalog ( 9 MB )

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