The paper introduces a notion of collaborative teleradiology as a novel organisation of information exchange during a remote radiological consultation. A general interaction pattern between medical experts taking part in a collaborative teleradiology session has been defined. This session has been compared to interaction typically performed in WWW centric teleradiology systems. Next technical implication of a proposed information exchange paradigm has been elaborated. Finally two prototype tools TeleNegatoscope and TeleDICOM that supporting of the collaborative teleradiology working environment have been described in more details.