2004
DOI: 10.1002/jmri.20044
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MR‐guided intravascular procedures: Real‐time parameter control and automated slice positioning with active tracking coils

Abstract: Purpose: To implement and optimize a real-time pulse sequence and user interface to perform intravascular interventions using active catheter tracking. Materials and Methods:In magnetic resonance (MR)-guided interventions, small radio-frequency coils can be used to rapidly determine the device position (active tracking). In this work, active catheter tracking was combined with a dedicated real-time pulse sequence and user interface. The pulse sequence offered the imaging contrasts fast low angle shot (FLASH), … Show more

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Cited by 63 publications
(44 citation statements)
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“…In order to reduce such false positives, intelligent postprocessing may be introduced such as that provided in Ref. 24 or by restricting peak detection within the close vicinity of the vessel anatomy (for example; from previously acquired angiograms). Recently, a similar tracking approach has been presented (25) that is based solely on an off-resonance tissue excitation and may lead to confounding results in the presence of fat tissues.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…In order to reduce such false positives, intelligent postprocessing may be introduced such as that provided in Ref. 24 or by restricting peak detection within the close vicinity of the vessel anatomy (for example; from previously acquired angiograms). Recently, a similar tracking approach has been presented (25) that is based solely on an off-resonance tissue excitation and may lead to confounding results in the presence of fat tissues.…”
Section: Discussionmentioning
confidence: 99%
“…The systematic deviations due to gradient nonlinearity are known to be approximately Ϯ5 mm at a distance of around 100 mm from the isocenter for the used gradient system. Thus, the error variation was related to the nonlinearity of the gradient system (24). As a result, with PRIDE, an absolute constant positional error of (4 -4.5) mm was observed.…”
Section: In Vitro Measurementsmentioning
confidence: 96%
“…The DCS algorithm was integrated into a real-time interactive pulse sequence for active catheter tracking (16,17). The pulse sequence allows for interactive contrast changes (e.g., as in FLASH and trueFISP), automatic slice alignment with the catheter coil, and real-time parallel image acquisition.…”
Section: Methodsmentioning
confidence: 99%
“…The operator does not need to manually realign the image position (or with multiple coils, the image orientation), but controls the imaging process and even selected imaging parameters through the catheter motion (9,10). If the position measurement is combined with a fast imaging pulse sequence (eg, balanced SSFP, TrueFISP) (45-47), the position of the catheter is detected between the acqui- sition of two real-time images, and the information can be used to reposition the imaging slice.…”
Section: Tracking and Profiling Rf Coilsmentioning
confidence: 99%