X-Lite QA Tool

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X-Lite QA Tool for Light Field Alignment Checks.

Correct alignment of the light field with the radiation field is essential for reliable treatment set-up.  According to national and international recommendations this alignment should be checked at least once a week and should correspond to within ± 2 mm at SSD 100 cm.

The X-Lite with a fluorescent plate helps you to align the accelerator radiation fields on the treatment table quickly and directly.  The plate is activated by ionizing radiation, producing a green fluorescence which is clearly visible for a few minutes after the radiation is switched off.  The 5 x 5, 10 x 10, 15 x 15 and 20 x 20 cm² active areas are permanently marked with field scales in centimeters.

A protective red filter prevents activation of the phosphor by the light field from the gantry head or by ambient light.  Irradiation photons and electrons penetrate the filter to activate the plate.

Using X-Lite is easy and alignment checks can be part of the daily routine.  With the filter in place, align the light field according to the scale on X-Lite.  Put any required build-up material on the plate and irradiate.  Remove the filter from X-Lite and check the radiation field alignment.

It is not necessary to wait for the afterglow to fade between irradiations, since the contrast is high as long as the following irradiation uses the same dose or higher

Specifications
Active Area:  23 x 23 cm
Field Scale:  5 x 5 cm, 10 x 10 cm, 15 x 15 cm, 20 x 20 cm²
Deviation Scale:  ± 5 mm in steps of 1 mm from each field scale.
Scale Accuracy:  ± 1 mm
Maximum Dose:  6 Gy/exposure
Radiation Type:  Photons, electrons
Daylight Filter:  Red, removable
Material:  Plexiglass / polycarbonate
Operating Temperature:  59° - 113° F (15° - 45° C)
Dimensions:  10.87 “W x 12.6” L x 0.55” H (27.6 x 32 x 1.4 cm)
Weight:  3.1 lbs (1.4 kg)