• Easy to use
• Provides quick visual verifications
• Helps eliminate errors

The GARD™ is designed to fit into the shadow tray of the therapy machine, providing a fixed reference point for all measurements. This helps to eliminate errors associated with using independent devices for each geometric parameter.

Gantry and Collimator Angle Indicators
By using a smart tool level, indicators of gantry and collimator angle can be visually verified to 1/16" (0.16 cm) of a degree. The level is mounted so that it can check any gantry or collimator angle.

Optical Distance Indicator and Laser Alignment
An acrylic tray with a distance scale is supplied with the GARD™. Simply slide the tray into the accessory mount of the GARD™ and turn on the machine distance indicator. The distance markers from the machine will be visible on the GARD’s™ distance indicator and should coincide. The sides of the GARD™ have white acrylic plates on which black vertical and horizontal lines have been engraved. When aligned, the field lasers should coincide with the etched black lines.

Light and Rotation Field Coincidence
A film cassette (8" x 10" or 20.32 x 25.4 cm) is included and fits into the accessory mount of the GARD™. The top is etched with markings of four field sizes. Field size and crosshair position accuracy, as well as light and radiation field coincidence, can be verified. Suggested film for this test is Kodak PPL.

Specifications
Goniometer Accuracy/Resolution: 0.2°
Optical Distance Indicator Resolution: 1.0 mm
Field Size Indicators: 5 x 5 cm, 10 x 10 cm, 15 x 15 cm,
20 x 20 cm
Size: 13.5" x 13.5" x 14.5" H (34.3 x 34.3 x 36.8 cm)
Weight: 9.5 lb (4.4 kg)