دورية أكاديمية
أعرض في EDS

Correction of B 0 eddy current effects in spiral MRI.

التفاصيل البيبلوغرافية
العنوان: Correction of B 0 eddy current effects in spiral MRI.
المؤلفون: Robison RK; Phoenix Children's Hospital, Phoenix, Arizona.; Barrow Neurological Institute, Phoenix, Arizona., Li Z; Barrow Neurological Institute, Phoenix, Arizona., Wang D; Mayo Clinic, Rochester, Minnesotta., Ooi MB; Barrow Neurological Institute, Phoenix, Arizona.; Philips Healthcare, Gainesville, Florida., Pipe JG; Mayo Clinic, Rochester, Minnesotta.
المصدر: Magnetic resonance in medicine [Magn Reson Med] 2019 Apr; Vol. 81 (4), pp. 2501-2513. Date of Electronic Publication: 2018 Nov 16.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: Wiley Country of Publication: United States NLM ID: 8505245 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1522-2594 (Electronic) Linking ISSN: 07403194 NLM ISO Abbreviation: Magn Reson Med Subsets: MEDLINE
أسماء مطبوعة: Publication: 1999- : New York, NY : Wiley
Original Publication: San Diego : Academic Press,
مواضيع طبية MeSH: Artifacts* , Magnetic Resonance Imaging*, Brain/*diagnostic imaging , Image Interpretation, Computer-Assisted/*methods , Image Processing, Computer-Assisted/*methods, Algorithms ; Computer Simulation ; Healthy Volunteers ; Humans ; Image Enhancement/methods ; Models, Statistical ; Motion ; Phantoms, Imaging ; Reproducibility of Results ; Signal-To-Noise Ratio
مستخلص: Purpose: B 0 eddy currents are a subtle but important source of artifacts in spiral MRI. This study illustrates the importance of addressing these artifacts and presents a system response-based eddy current correction strategy using B 0 eddy current phase measurements on a phantom.
Methods: B 0 and linear eddy current system response measurements were estimated from phantom-based measurement and used to predict residual eddy current effects in spiral acquisitions. The measurements were evaluated across multiple systems and gradient sets. The corresponding eddy current corrections were studied in both axial spiral-in/out TSE and sagittal spiral-out MPRAGE volunteer data.
Results: Correction of B 0 eddy currents using the proposed method mitigated blurriness in the axial spiral-in/out images and artifacts in the sagittal spiral-out images. The system response measurement was found to yield repeatable results over time with some variation in the B 0 eddy current responses measured between different systems.
Conclusions: The proposed eddy current correction framework was effective in mitigating the effects of residual B 0 and linear eddy currents. Any spiral acquisition should take residual eddy currents into account. This is particularly important in spiral-in/out acquisitions.
(© 2018 International Society for Magnetic Resonance in Medicine.)
فهرسة مساهمة: Keywords: artifacts; eddy currents; gradient characterization; non-Cartesian; spiral
تواريخ الأحداث: Date Created: 20181117 Date Completed: 20200331 Latest Revision: 20200331
رمز التحديث: 20240628
DOI: 10.1002/mrm.27583
PMID: 30444004
قاعدة البيانات: MEDLINE
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