| 摘要 |
<p>The invention relates to carrying out a pre-adjustment, oefore photographing is started, in panoramic X-ray photo- <Sub>"</Sub>raphy using an X-ray apparatus (7) which performs a rotational movement and supports a moving film (4) and an X-ray source (9). A correct positioning of the focus in relation to the patient is achieved without moving the patient - only by selecting the correct dependence between the film speed and the movement of the X-ray apparatus (7).</p><p>In the apparatus, an indicator device (2) is used, and the correct speed variation curve for the film during the photographing movement is selected on the basis of the position or reading of the indicator device (2). The film is reeled preferably by means of an electric motor (6), in which case a sensor (1) can be connected to the indicator device (2), and the motor (6) is controlled electronically according to the electric output signal of the sensor (1) by means of, for example, a microprocessor (13).</p> |
