| 摘要 |
<p>This x-ray imaging device controls the position of a receptor field, which is for automatic exposure at an imaging range (elongated imaging range) of an elongated image formed by means of a plurality of x-ray images joined by an image joining unit, in a manner so as to be irradiated by the collimator lamp (29a) of a light radiating mechanism (29). The collimator lamp (29a) is embedded in a collimator (22a), and the collimator lamp (29a) is moved in lockstep with the inclination of an x-ray tube (22), thus illuminating the position of the receptor field. In such a manner, the positon of the receptor field is clearly indicated by means of light to an operator, and so it is possible for the position of the receptor field to be clearly determined and it is possible to select an appropriate receptor field. As a result, it is possible for the amount of entering x-rays to be set to an optimum value in the various imaging. Also, there is the effect that it is possible to suppress the amount of exposure of a subject even during elongated imaging.</p> |
