Vatech GREEN SMART, User Manual

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15. Appendices
180 Green Smart User Manual
machines have a bite block to indicate the correct anterior-posterior position, or how far
forward or back the patient should be positioned, side positioner guides for determining
the correct lateral alignment, and chin rest to correctly locate the superior-inferior
dimension or how far up or down the chin should be positioned.
4,10 Panoramic x-ray
machines are available with a mirror and laser light beam guide that shines on the
patient's face to illustrate various anatomical planes
(Figure 2) . Incorrectly positioning the
patient in any of these three dimensions will produce unique and distinct radiographic
image errors
(Table 1) .