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 The wall mounted treatment block verification unit is used to verify patient treatment blocks to a port film. Due to the system’s openness it gives a less confined area to work in. This adjustable system covers long target to film and target to block tray distances.
This unit uses a high intensity quartz lamp (12 volt, 50 watt) with power switch and indicator light. The Halogen lamp and power supply are mounted on a removable tray for easy replacement of the lamp. The lamp aperture hole is 2 mm in diameter and is adjustable in both the X and Y plane. A lock holds the vertical position over a 30 cm range.
The blocking tray is adjustable from 8 cm to 95 cm and has an adjustable scale that reads the target to tray distance. A vertical lock holds the tray in position. Different type treatment tray frames are available for all manufacturer’s machines. This block verification unit allows inter-mixing of treatment type frames, allowing for verification of all blocks. Adjustability of each frame to central axis is mechanically done by a removable metal plate.
The high intensity view box has four 20 watt lamps with a high and low intensity switch. This allows easy viewing and alignment of the x-ray films over the crosshairs inscribed on top of the view box. The view box sits inside an adjustable metal pan which allows for easy removing and insertion, but retains alignment when re-installed. This pan is adjustable in the X and Y directions and fixed in place by locking four knobs on the bottom. A scale along the side reads target to film distance. For easier viewing of the treatment field areas, the film can be held in place with masking tape and a thin white sheet of paper can be taped down over the film. By tracing the x-ray film outline through to the white sheet of paper, visibility of the blocking area is easily seen under the high intensity light.
Both the block holding tray scale and the view box scale adjust when either the lamp tray, block tray or view box is moved.
Calibration
Central axis alignment is accomplished by using the stationary crosshair alignment plate and securing it to the block holding tray. When the target and view box are adjusted properly, the cross- hairs on the blocking tray will superimpose over the view box cross-hairs and over its entire range of travel (8 cm to 95 cm). When calibration is complete, remove the crosshair alignment plate and install the block holding tray.
Specifications:
Target to Block Tray Distance: 8 cm to 95 cm
Target to Film Distance: 45 cm to 195 cm
Ceiling Height: 8 ft. 2 1/2” (unit can be made shorter if requested)
Light Source
Halogen Lamp: 12 V, 50 watt
Power: 115 VAC 60 Hz
View Box
Lamps: Four (20 watt)
Size: 18” x 24 3/4” x 2 3/4”
Power: 115 VAC 60 Hz
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