In a method and x-ray system for determination of the relative position of an x-ray source relative to an x-ray image detector, a reference structure in a known position relative to the x-ray source is introduced into the beam path between the x-ray source and the x-ray image detector. The final blade shape is machined or produced by EDM or milling. For example, in one embodiment at least two configuration levels are available: an administrator level that can control and configure aspects of the RBMS such as the legacy and non-legacy tasks associated with a particular role and defining what tools will be provided to the end user level and an end user level. The polymeric material can be a hydrophobic polymer, a hydrophilic polymer, a non-fouling polymer, or combinations thereof. The URLC messages are sent between MSs and UNCs using an Up interface comprising a set of layered protocols over an underlying IP transport. The triangle data from each new cell may then be encoded as a list of integers including the triangle data.