| Noncontrast SSFP pulmonary vein magnetic resonance angiography: impact of off-resonance and flow. | |
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MedLine Citation:
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PMID: 21031533 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: To investigate pulmonary vein (PV) off-resonance and blood flow as causes of signal void artifacts in noncontrast steady-state-free-precession (SSFP) PV magnetic resonance angiography (MRA). MATERIALS AND METHODS: PV blood off-resonance was measured on 11 healthy adult subjects and 10 atrial fibrillation (AF) patients. Noncontrast PV MRA was performed using a 3D slab-selective SSFP sequence at 1.5T on seven healthy subjects with signal profile shifts of 0-125 Hz. The time-resolved blood flow velocity of the PVs was measured on five healthy subjects. The impact of flow was studied on six healthy subjects, on whom SSFP PV MRA was acquired twice with the electrocardiogram (ECG) trigger delay corresponding to low and high flow, respectively. RESULTS: The PV off-resonances were 97 ± 27 Hz, 65 ± 20 Hz, 74 ± 25 Hz, and 52 ± 17 Hz for right inferior, left inferior, right superior, and left superior PVs, respectively, on healthy subjects, and 74 ± 20 Hz, 38 ± 9 Hz, 51 ± 20 Hz, and 28 ± 11 Hz on AF patients (P<0.01 for all). The off-resonance caused severe signal voids in the PVs. Signal acquired during mid-diastole with high PV flow caused additional signal voids in the left atrium, which was reduced by setting the ECG trigger delay to late-diastole. CONCLUSION: PV off-resonance and flow causes signal void artifacts in noncontrast 3D slab-selective SSFP PV MRA. |
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Authors:
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Peng Hu; Christian T Stoeck; Jouke Smink; Dana C Peters; Long Ngo; Beth Goddu; Kraig V Kissinger; Lois A Goepfert; Jonathan Chan; Thomas H Hauser; Neil M Rofsky; Warren J Manning; Reza Nezafat |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 32 ISSN: 1522-2586 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-29 Completed Date: 2011-02-14 Revised Date: 2012-02-28 |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 1255-61 Citation Subset: IM |
Copyright Information:
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© 2010 Wiley-Liss, Inc. |
Affiliation:
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Department of Medicine (Cardiology Division), Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Artifacts Atrial Fibrillation / pathology, physiopathology Blood Flow Velocity* Electrocardiography Humans Imaging, Three-Dimensional Magnetic Resonance Angiography* Pulmonary Veins / pathology* Respiratory-Gated Imaging Techniques |
| Grant Support | |
ID/Acronym/Agency:
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1R01EB008743-01A2/EB/NIBIB NIH HHS; R01 EB008743-01A2/EB/NIBIB NIH HHS; R01 EB008743-04/EB/NIBIB NIH HHS |
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