MR visualization of interventional devices

Details MR visualization of interventional devices MR visualization of interventional devices

2004-01-30

2008-10-21

Winakur, Eric F (Department: 3768)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C600S424000, C600S433000, C324S309000

Reexamination Certificate

active

07440792

ABSTRACT:
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).

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