  Semiconductor pixel detectors offer features for the detection of radiation
which are interesting for particle physics detectors as well as for imaging
e.g. in biomedical applications (radiography, autoradiography, protein
crystallography) or in Xray astronomy. At the present time hybrid pixel
detectors are technologically mastered to a large extent and large scale
particle detectors are being built. Although the physical requirements are
often quite different, imaging applications are emerging and interesting
prototype results are available. Monolithic detectors, however, offer
interesting features for both fields in future applications. The state of
development of hybrid and monolithic pixel detectors, excluding CCDs, and their
different suitability for particle detection and imaging, is reviewed.
