Radiographic apparatus

摘要

The disclosure provides a radiographic apparatus that allows suppression of needles radiation exposure to a subject. Specifically, the disclosure includes an X-ray tube, a collimator, and a visible light source. The spread of visible light beams through the collimator opening too largely may not possibly conform to the spread of radiation. Such a situation may occur when the apparatus is provided with the X-ray tube that emits narrow radiation. In order to avoid such a situation, the disclosure sets an upper limit of a degree of opening as an upper limit of a degree of opening of the collimator. With a construction of the disclosure, there is no need to perform further radiography. This achieves the radiographic apparatus that allows suppression of needless radiation exposure to a subject.

主权项

1. A radiographic apparatus, comprising:
an x-ray source configured to emit x-ray; a detecting device configured to detect the x-ray passing through a subject; a collimator configured to restrict the spread of the x-ray emitted from the x-ray source; a collimator activating device configured to activate the collimator to change a degree of opening of the collimator; a visible light source provided on the collimator and configured to emit visible light beams which pass through a space between shielding vanes of the collimator; a visible light source controller configured to control the visible light source; a calculation device configured to calculate an upper limit of the degree of opening based on spread of the x-ray emitted from the x-ray source; and a collimator controller configured to control the collimator activating device so that the spread of the x-ray does not exceed the upper limit of the degree of opening.