28 June 2001 Compensation for MR geometric image distortion caused by the implantable drug infusion pump
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Abstract
Implantable devices often cause serious MR image artifacts in the vicinity of their implanted locations as the result of susceptibility-induced image distortion, and the resulting artifacts may render the MR images useless for diagnosis. To reduce the MR artifacts in the stage of image acquisition, we have implemented a scheme by which the field inhomogeneity is compensated in a spin echo imaging sequence by introducing a readout-like gradient pulse along the slice-select gradient direction temporally concurrent with the read-out gradient (TE equals 20 msec). It can be shown that this slice direction compensation gradient pulse during the read-out period compensates the field inhomogeneity during the image data collection period.
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Haiying Liu, John Kucharczyk, Charles L. Truwit, "Compensation for MR geometric image distortion caused by the implantable drug infusion pump", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); doi: 10.1117/12.430866; https://doi.org/10.1117/12.430866
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