The invention relates to a computed tomography apparatus (CT apparatus)
for imaging by means of radiation having traversed an object to be
examined (that is, directly transmitted radiation), as well as by means
of radiation scattered by the object to be examined, which apparatus
includes a radiation source (S), a detector arrangement (16) and a device
whereby the radiation (41a) having traversed the object to be examined
can be blocked at least to an extent that the intensity incident on the
detector arrangement (16) does not substantially exceed the intensity of
radiation (41b) scattered by the object (13) to be examined and incident
on the detector arrangement (16). The invention enables the detection of
scattered radiation (CSCT mode) which is not affected by crosstalk from
the transmitted radiation, even when the detector arrangement does not
satisfy severe requirements as regards crosstalk properties and/or is
configured as a single-row detector arrangement.