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• W2890660458 abstract "Abstract Purpose To develop a wideband cardiac perfusion pulse sequence and test whether it is capable of suppressing image artifacts in patients with a cardiac implantable electronic device (CIED), while not exceeding the specific absorption rate (SAR) limit (2.0 W/kg). Methods A wideband perfusion pulse sequence was developed by incorporating a wideband saturation pulse to achieve a good balance between saturation of magnetization and SAR. Clinical standard and wideband perfusion MRI scans were performed back‐to‐back in a randomized order on 16 patients with a CIED undergoing clinical cardiac MRI. Two expert readers graded the artifact intensity and extent on a segmental basis using a 5‐point Likert scale, where significant artifact was defined by a composite score. The variance in myocardial signal prior to tissue‐enhancement was analyzed to quantify artifact‐intensity. Whole‐body SAR values computed by the MR scanner were read from the DICOM header. Either a paired t‐test or Wilcoxon signed‐rank test was performed to compare two groups. Results While the mean whole‐body SAR for a single‐slice wideband perfusion scan (0.38 ± 0.08W/kg) was significantly (p < 0.05) higher than for a single‐slice standard perfusion scan (0.11 ± 0.03W/kg), it was 81% below 2.0 W/kg. The mean variance in myocardial signal prior to tissue‐enhancement was significantly (p < 0.001) higher for standard (422.6 ± 306.6 a.u.) than wideband (107.0 ± 60.9 a.u.). Among 105 myocardial segments, standard produced 19 segments (18%) that were deemed to have significant artifacts, whereas wideband produced only 3 segments (3%). Conclusion A wideband perfusion pulse sequence is capable of suppressing image artifacts induced by a CIED while not exceeding SAR at 2.0 W/kg." @default.
• W2890660458 created "2018-09-27" @default.
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• W2890660458 date "2018-09-09" @default.
• W2890660458 modified "2023-10-18" @default.
• W2890660458 title "Wideband myocardial perfusion pulse sequence for imaging patients with a cardiac implantable electronic device" @default.
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• W2890660458 doi "https://doi.org/10.1002/mrm.27458" @default.
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