To enable the speedy volume scan of an examination object while using an X-ray irradiator provided with an anode extended long in Z-axis direction.
This device has an X-ray irradiator 2, which can rotate around a system axial line for transmissive irradiation in the various different directions of the examination object, and a detector D and the X-ray irradiator 2 has an anode 12 extended long in the direction of the system axial line. On the anode 12, a focus F is deflected in lengthwise direction by an advancing magnetic field so that the volume scan of the examination object 1 can be performed, a primary beam diaphragm 14 for narrowing X-ray beam flux 3 into the shape of pyramid is adjusted synchronously with the move of the focus F so that the X-ray beams emitted from the examination object 1 can be completely made incident to the detector D, and the detector D is formed from a matric composed of plural detecting elements.
SCHARDT PETER DR
SCHWIERZ GUENTER
