Patent ID: 6847837

Claim:
An MR imaging method for imaging and determining the position of a medical device, the medical device having a passive resonance circuit with an inductor and a capacitor, the inductor being integrated into or formed by an unfolding portion of the medical device that at least in part is capable of being unfolded when inserted in an examination object, the method comprising: arranging the examination object in an external magnetic field, applying high-frequency radiation having a specific resonance frequency essentially equal to a resonance frequency of the passive resonance circuit so that transitions between spin energy levels of the atomic nuclei of the examination object are excited, and MR signals are produced, detecting the MR signals as signal responses, which are evaluated and imaged in spatial resolution, unfolding the unfolding portion of the device after insertion into the examination object such that the inductor formed by or integrated into the unfolding portion unfolds along with the unfolding portion, producing, by means of the device, a changed signal response of the examination object in a locally defined area, and detecting the changed signal response of the examination object to determine the position of the medical device.