| | Shadow Tray Slot | | Wedge Slot |  | |  | | This economical grid tray slides into the shadow tray slot, projecting comparable centimeter scales on both simulation and port films. The reference dot scale is calibrated to project precise reference dots 1cm or 2cm apart at the isocenter of the treatment machine. The trays feature a straight pin with 1 or 2 cm spacing. | | The wedge slot tray features divergent pins 1.6 mm diameter x 12.7 mm long that project precisely-spaced dots at 0, 1, 2, 3, 5, 7.5, 10, 15, 17.5, and 20 cm in four quadrants at 100 cm isocenter. The small dots are highly visible, yet prevent obscuring the film view, and allow ease and precision of measurements. Trays are capable of covering an overall projected field size of 40 x 40 cm. | | | | | String Reticule | | |  | | | | This tray is designed to be used in the wedge slot to project a shadow of the central axis lines onto the patient or treatment table. It eliminates the problem of “drifting” axis lines. The tray is precision crafted of black anodized aluminum and black nylon string. Ends of both strings are quickly and precisely cam-adjustable to match the central axis position and can be positively locked to maintain any position. | | |
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