An imaging apparatus of a radiological imaging apparatus is provided with a first
and a second radiation detectors disposed around a hole portion into which a bed
is inserted. The first radiation detector includes a detecting portion formed of
GaAs of a square having a side of 5 mm and having a thickness of 2 mm. The second
radiation detector includes a detecting portion formed of CdTe of a cube having
a side of 5 mm. The first radiation detector detects X-rays emitted from an X-ray
source and transmitted through an examinee and does not detect -rays emitted
from the examinee. The second radiation detector detects above X-rays and -rays.
An X-ray signal processing apparatus processes an X-ray image signal from the first
radiation detector and outputs intensity information thereof. A signal discriminating
apparatus processes a -ray image signal from the second radiation detector
and outputs a pulse signal. Thus, the radiological imaging apparatus capable of
carrying out radiation examination of the subject by using X-rays and -rays
can be simplified.
