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Shifted rotated keyhole imaging and active tip‐tracking for interventional procedure guidance
Author(s) -
Wendt Michael,
Busch Martin,
Wetzler Rainer,
Zhang Qiang,
Melzer Andreas,
Wacker Frank,
Duerk Jeffrey L.,
Lewin Jonathan S.
Publication year - 1998
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880080144
Subject(s) - interventional magnetic resonance imaging , computer science , electromagnetic coil , computer vision , radiofrequency coil , artificial intelligence , tracking (education) , biomedical engineering , medical physics , medicine , radiology , magnetic resonance imaging , physics , psychology , pedagogy , quantum mechanics
The tools and devices used for patient treatment during interventional procedures must be accurately and safely localized. Recently, procedure guidance has been performed increasingly with MRI, but tool localization has been performed primarily by analyzing the lack of signal caused by displaced excited tissue and/or susceptibility artifacts. In this investigation, a new technique was developed to actively detect and visualize interventional tools using receive coils mounted on the tip of the interventional devices. Unlike earlier methods, in which images from small devicemounted coils are superimposed on a previously acquired image data set, our localization method uses similar tip‐mounted tools in combination with a radiofrequency (RF) switching circuit, standard imaging coils, and specially modified sequences to toggle between the standard and tipmounted receive coil within a single fluoroscopic mode sequence. With this technique, the misregistration between the reported anatomic location and true location of interventional devices is minimized.