An imaging system including means for transmitting a digital image, an image base, a sensor, means for referencing positions on a dummy, echographic display means, means for recalculation of a three-dimensional image, and means for receiving expert assessment results combining videoconference ability and the possibility of remote manipulation of two-dimensional images. The three dimension heating gradient field is generated with catalytic heater panels having independently adjustable angles and adjustable heat outputs. A new set of relations is created by replacing each first data element of the subset by its representative in at least part of the set of relations. Furthermore, the connectors have a mechanical contact surface at a right angle to their center axis and distant from the spring loaded contact elements and the contact surface. Positioning of the text elements is determined based on the height of the text elements, defined text element spacing distances, and a defined positioning order. The service system selects a service that a user can use from those and displays the selected service.