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Machine QA

MiniPhantom with In-Air Comparison Jig Head-Scatter Measurement

Measure head-scatter factors down to a 3 cm x 3 cm field size simply and easily without side scatter from a water tank.

MiniPhantom with In-Air Comparison Jig Download:

MiniPhantom with In-Air Comparison Jig Overview

Versatile and Easy to Use

  • Scribed lines help quickly align the collecting volume of the ion chamber.
  • Stand positions the MiniPhantom horizontally for measuring beams.

Account For Stray Radiation

  • Measure head-scatter factors with standard farmer-type ion chambers.
  • Small phantom stand minimizes scatter and can be used as an in-air comparison jig, positioning two ion chambers side-by-side in a reproducible manner.

MiniPhantom

  • REF 72208-C07
    MiniPhantom for Model A12 Exradin Farmer-type Chamber
  • REF 72208-C10
    MiniPhantom for Model A12 Exradin Farmer-type Chamber with In-Air Comparison Jig
  • Diameter
    3 cm (1.18 in)
  • Length
    20 cm (7.87 in)
  • Centroid of chamber volume
    10 cm from end of phantom
  • Material
    Water-equivalent plastic
  • Alignment Marking
    Fiducial marks denote chamber centroid of volume

In-Air Comparison Jig

  • REF Number
    72193
  • Height (Center Rod)
    40 cm (15.75 in)
  • Height (Chamber Holder)
    2.22 cm (1 in)
  • Width (Chamber Holder)
    6.35 cm (2.50 in)
  • Length (Chamber Holder)
    2.22 cm (1 in)
  • Chamber clamp size accommodations
    From 1/4” to 1/2” diameter for in air comparisons
  • Base
    33.02 cm (13 in) equilateral triangle
  • Material (Center Rod)
    Carbon Fiber
  • Material (Chamber Holder)
    Polycarbonate
  • Material (Base)
    Acrylic
  • Material (Screws)
    Nylon
  • Alignment Marking
    Fiducial marks on clamp assist in laser alignment

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Tech Notes

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