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Acasa arrow Echipamente medicale arrow Radiation/Oncology QA arrow Linear Accelerator QA arrow Instrumente arrow Precision Isocentric QC Beam-Checker II
 




Precision Isocentric QC Beam-Checker II




This precision quality control tool is ideal for daily, weekly and monthly quality control assessments of all mechanical and geometrical parameters of linear accelerators or teletherapy units.

The Precision Isocentric Beam Checker II consists of a large opaque acrylic screen backed by a secondary plate, both supported by two uprights. The screen is inscribed with lines precisely defining the corners, edges and center of the screen’s 10 x 10 cm and 20 x 20 cm fields. Intersecting center lines are inscribed with short lines spaced 1 cm apart. The screen can rotate about its axis in increments of 45°. Tungsten markers of 2 mm in diameter are embedded in the center and corners of the fields.

A 10 x 12 inch ready-pack film can be sandwiched between the two plates. When exposed, the tungsten markers project a sharp image on the film, thus eliminating the inaccuracy and need to prick holes into the film.

The device’s acrylic base-plate has an attached bubble level and non-slip leveling legs that allow it to be quickly and conveniently set up for use.
Applications
For checks of:
  • Radiation and light-field congruence
  • Collimator isocentricity
  • Collimator field-size accuracy
  • Gantry isocentricity
  • Table isocentricity
  • ODI accuracy
  • Isocenter rotational stability
  • Laser alignments






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