The relation relates to a method and a radiological imaging device. A
subject (4) is illuminated by a luminous flux (1) generated by an X-ray
source (2). This luminous flux (1) is a pulse having a duration t.sub.p
shorter than 1 ms. The signals S derived from the interaction of the
luminous flux (1) with the subject (4) are then detected by means of an
X-ray detector (5) having a response time t.sub.r shorter than 0.1
ms.Applications possible in medical imaging (mammography, dental care, .
. . ).