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- W2117423897 abstract "This paper addresses one of the major problems in Interventional magnetic resonance imaging (MRI): the visualization of interventional devices. For visualization locally induced magnetic fields are used, which disturb the homogeneity of the main magnetic field of the MR scanner. This results in signal loss in the vicinity of the device due to intravoxel dephasing, and leads to a disturbance of the phase image. The local fields are established by a low current in a closed copper loop along the device. This method will be introduced as a means for catheter visualization. The basic theory behind this method is presented. Simulations are performed to determine the effect of intravoxel dephasing, without interfering effects like susceptibility or radio-frequency artifacts. Scanned and simulated data is used to verify the theoretical consideration. Different configurations of wire loops are discussed and two types of catheter visualization scans are proposed. Results from a pig study show that this methods holds promise for intravascular interventions under MRI guidance." @default.
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- W2117423897 date "1998-01-01" @default.
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- W2117423897 title "Device visualization for interventional MRI using local magnetic fields: basic theory and its application to catheter visualization" @default.
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- W2117423897 doi "https://doi.org/10.1109/42.736037" @default.
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