1. Treatment Accessories
1. Beam Directional Devices - Indicate beam direction and location of
isocenter
 Lasers
 Cross hairs
 Gradicule,
 BB trays, field light and mirror assembly
 Digital readouts for gantry and collimator angles
 Electron cones and collimators
 Front and back pointers
 Breast bridge - After borders are determined, place bridge
to skin marks and you will find field separation)
2. Beam Modifiers - modify the absorption and scattering
characteristics of the beam
 Standard Wedges
 Dynamic wedges
 Custom tissue compensators (copper brass, lead &
Lucite)
 Bolus materials
 Cerrobend blocks
 MLC
Latching mechanisms for interlocking accessories such as cones, trays, and
standard wedges should be checked monthly
Fabricated Cerrobend blocks may be checked for voids using radiographic
imaging
When pouring, care must be taken to prevent air bubble formation
Bolus materials should be checked regularly for cleanliness and voids, and for
appropriate thickness
Treatment accessories need to be checked for physical integrity and reliability
such as tears, leaks, and broken parts