MR method for generating MR images of an object to be examined located
inside an examination volume by means of an MR device and for
simultaneously locating an interventional instrument inserted into the
examination object, which instrument is equipped with a locating device.
For the reconstruction of an MR image (20) MR signals together with
device-delivered location signals from the examination volume are then
recorded, after which the locating of the instrument takes place by the
assessment of the image characteristics conditioned by the location
signals. For making it possible to determine the position of the
interventional instrument in an extremely rapid way, the invention
proposes that the recording of the MR signals be effected by recording
successively a plurality of MR partial data records (16, 17, 18) with
respective incomplete and preferably non-cartesian sampling of the local
frequency spectrum assigned to the examination volume. Two locating data
records (21, 22) each are extracted from each of the MR partial data
records (16, 17, 18). The actual locating of the instrument then takes
place in that a difference image (33) is reconstructed from the two
locating data records (21, 22).