Versatile shadow tray assemblies

Our range of shadow tray assemblies and coded trays are intended for use with all Elekta linear accelerators and simulators, providing a means of positioning beam shaping blocks in the treatment or simulator beam, enabling shaping of the treatment beam to shield critical organs.

The lightweight frame attaches easily to the head of the linear accelerator or simulator, using a hook-and-latch system. An electrical connection is made automatically upon attachment to the head so that the shielding tray assembly is registered in the patient prescription. The shadow tray assembly is available in two sizes; short and long, enabling clearance around the patient to be maintained.

Easy-fit beam block kits

Two standard clinical lead beam block kits are available:

• low energy kit (for 4 to 6MV systems) and high energy kit (for 6 to 23MV systems) each consisting of 14 clinical beam blocks
• both kits can be used with either the standard or the wire mesh beam block trays
• all blocks come with easy-fi t screw attachment which facilitates use at all gantry angles
• Provided as part of the Elekta standard accessories kit.

Port film gratilcule

Designed to fit into the coded shadow tray and facilitates field size verification, positioning of lead blocks and tumor localization when used with a portal film or imaging system. It provides opaque calibrated markers to ease image comparison, and the off-axis marker assists with fi lm orientation.

Hook and latch graticule

Solid frame port film magnification graticule that attaches directly to the linear accelerator head, taking the place of the coded shadow tray holder, thus providing greater clearance between the patient and the accessory. Used in treatment verification for situations where simultaneous fitting of the blocking tray is not required.

Beam block trays

Beam block trays are designed to slide easily into the lightweight frame. All trays can be coded and these codes entered into the patient prescription to ensure safety and accuracy in the positioning of customized shielding blocks.

Patient set-up time can be reduced by using dedicated shielding trays for each beam. Four tray types are available as standard: the star, slotted and solid acrylic blocking trays with conventional configurations. For special tray configuration, please contact your local Elekta representative or authorized distributor.

The wire mesh tray is fabricated using one piece of aluminum. Closely aligned fixing holes allow the user excellent versatility in block positioning. This close alignment of the fixing holes also results in negligible attenuation.

Universal cassette holder

• Robust, free-standing universal cassette holder with graduated, calibrated movements for fast and easy set-up
• Mechanical scales ensure accurate alignment of the distance and angle of the film with respect to the direction of the beam
• Movements are counter-balanced for ease of adjustment
• Accepts cassettes with a vertical height of 36 to 177cm
• Provided as part of the Elekta standard accessories kit.

To download a copy of the Beam Blocking & imaging Accessories brochure, click here.