Abstract: The invention relates to a reduced sensor head (30) for an X-ray detector (74), comprising a printed circuit board (10) having an end face (12) and lateral faces (14), a sensor chip (32) which is arranged on the end face (12) of the printed circuit board (10) and which is sensitive to X-ray radiation (72), a plurality of signal and control connections (40), a plurality of bonding islands (16) which are arranged on the printed circuit board (10) so as to make contact and which are electrically conductively connected to the signal and control connections (40) by means of at least one respective bonding wire (46), wherein the bonding islands (16) are arranged on the lateral faces (14) of the printed circuit board (10).