A plunger is movably arranged within a syringe tube (32). Multiple resilient tabs (30) are provided in the tube, to releasably engage the syringe with the syringe retaining mechanism of the injector. A sealing flange (46) is provided surrounding the syringe tube. Independent claims are also included for the following: (a) injector; (b) method of connecting syringe to injector; (c) injector system; (d) method of preparing injector; (e) syringe adaptor.
