Görüntü rehberli girişimler için ters kutuplaşma temelli manyetik rezonans teknolojileri

In this PhD dissertation, we presented four magnetic resonance (MR) technologies establishedupon reverse polarization for image guided interventions. The first three studies are based ontracking interventional devices, such as catheters, biopsy needles, and guidewires. Theinterventional devices cannot be seen using MRI without markers, coils, or extra devices. Ourstudies utilize different imaging modalities in order to obtain positional information of theinterventional devices. The last study is a novel inductively coupled radio frequency birdcagecoil design, which is a miniaturized version of a widely used volume coil. The new design canbe used for prostate biopsy or imaging intestines.The reverse polarization is a mode of magnetic field that is not sensitive to anatomy signal.Therefore, it had been useless until the introduction of the reverse polarization concept. Usinga linearly polarized inductively coupled radio frequency (ICRF) coil enables the reversepolarization mode, because a linearly polarized signal consists of both forward and reversepolarization signals. As a result, building the ICRF coil to interventional devices paves the wayof using this method in interventional MRI.Performances of developed technologies were tested in phantom, animal, and volunteerstudies. We believe that the studies explained in this dissertation contribute to obtaining betterimaging systems.Key words: Magnetic resonance imaging, interventional MRI; catheter tracking; fiducialmarker, inductively coupled RF (ICRF) coil, transmit array system, birdcage coil