X-ray or infrared imaging device comprising a dose limiter, with controlled translation speed

摘要

An X-ray or infrared imagery apparatus that performs a large sweep while reducing the irradiation or illumination dose. It comprises a support, an X-ray or light ray source that emits a beam through a slit of a dose limiter which is driven in translation, a detector irradiated or illuminated by the beam in order to detect an intensity attenuated along the X-ray or light ray propagation path through the body, an analog-to-digital converter to convert the detected intensities into data in order to determine an attenuation of the X-rays or light rays by the body, and a programmed computer to process the data in order to obtain an image representing the attenuation of the X-rays or light rays. The dose limiter either is driven in translation at a speed proportional to the detector or driven in translation at the same speed than the detector in front of a reflector.

主权项

1. X-ray or infrared imagery apparatus, for radiography or scanning, comprising:
a support for receiving a body to be examined, an X-ray or light ray source provided with a focus for emitting a beam passing through a slit of a dose limiter driven in translation to sweep the body, a detector driven in translation to be irradiated or illuminated by the beam sweeping the body in order to detect an intensity attenuated along the X-ray or light ray propagation path through the body, an analog-to-digital converter to convert the detected intensities into data in order to determine an attenuation of the X-rays or light rays by the body, and a programmed computer to process the data resulting from the conversion of the detected intensities in order to obtain an image representing the attenuation of the X-rays or light rays,wherein the dose limiter is driven in translation with a speed proportional with the detector, controlled by the ratio of the distances between, on the one hand, the focus and the detector and, on the other hand, the focus and the dose limiter.