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Strato X User Manual - Image Works

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USER'S MANUAL<br />

General instructions for use<br />

• Part of the image is enlarged while the other one is reduced<br />

The schema described on Figure 43 the film obtained; it is possible to<br />

observe that one part of the radiography is blurred and enlarged,<br />

while the other one is reduced and seems to be on focus; the two<br />

condiles are at the same height on the film.<br />

Figure 43<br />

Possible cause:<br />

This effect can be due to two different causes.<br />

In the first one, the median-sagittal plane is not<br />

aligned with the relevant centring light beam, which<br />

falls at the centre of the chin support.<br />

In the second case instead, the centre of the mediansagittal<br />

plane matched the centre of the chin support,<br />

but the patient’s head is rotated.<br />

In both cases, one side is closer to the film plane than the other, thus<br />

resulting in a different magnification of the two sides; the part more<br />

distant from the film will be more magnified while the part closer to<br />

the film plane will result smaller. This error in positioning the patient<br />

will result in a radiography as shown in the next drawing: the rightmost<br />

area of the image shows a bigger magnification that can be<br />

noticed either on the teeth and on the ascending rami of the TMJ.<br />

Remedy:<br />

Check the positioning of the median-sagittal plane by using the<br />

relevant centring light beam.<br />

Check also the position of the middle sagittal beam; lighted, it must<br />

fall down on the center of the chin rest and also on the center of the<br />

byte.<br />

(Rev. 1)<br />

127<br />

STRATO X (120V)

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