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  • Devices designed for direct coupling of the gantry of a radiographic, imaging, or radiotherapy unit and the driving motors used to move and position the gantry and/or the patient table. These units usually consist of a mechanism that couples the driving motors to the gantry or table; the mechanism may include integral electronic controls to regulate the speed and direction of movement of the gantry. Direct coupling driving units are intended to improve the characteristics of the gantry system (e.g., by permitting faster acceleration/deceleration and increasing the speed of operation). Dedicated driving units for single (i.e., x-axis) or multi-axes movements (i.e., two or three axes, known as XY and XYZ axes, respectively) at various speeds and/or resolutions are available. Dedicated units intended for rotatory motion gantries are also available.
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