Non-ECG-gated myocardial perfusion MRI using continuous magnetization-driven radial sampling.
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| Title: | Non-ECG-gated myocardial perfusion MRI using continuous magnetization-driven radial sampling. |
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| Authors: | Sharif, Behzad1,2, Dharmakumar, Rohan1,2,3, Arsanjani, Reza1,4, Thomson, Louise4,5, Bairey Merz, C. Noel2,3,4,5, Berman, Daniel S.1,3,4, Li, Debiao1,2,3 |
| Source: | Magnetic Resonance in Medicine. Dec2014, Vol. 72 Issue 6, p1620-1628. 9p. |
| Abstract: | Purpose Establishing a high-resolution non-ECG-gated first-pass perfusion (FPP) cardiac MRI technique may improve accessibility and diagnostic capability of FPP imaging. We propose a non-ECG-gated FPP imaging technique using continuous magnetization-driven golden-angle radial acquisition. The main purpose of this preliminary study is to evaluate whether, in the simple case of single-slice two-dimensional imaging, adequate myocardial contrast can be obtained for accurate visualization of hypoperfused territories in the setting of myocardial ischemia. Methods A T1-weighted pulse sequence with continuous golden-angle radial sampling was developed for non-ECG-gated FPP imaging. A sliding-window scheme with no temporal acceleration was used to reconstruct 8 frames/s. Canines were imaged at 3T with and without coronary stenosis using the proposed scheme and a conventional magnetization-prepared ECG-gated FPP method. Results Our studies showed that the proposed non-ECG-gated method is capable of generating high-resolution (1.7 × 1.7 × 6 mm3) artifact-free FPP images of a single slice at high heart rates (92 ± 21 beats/min), while matching the performance of conventional FPP imaging in terms of hypoperfused-to-normal myocardial contrast-to-noise ratio (proposed: 5.18 ± 0.70, conventional: 4.88 ± 0.43). Furthermore, the detected perfusion defect areas were consistent with the conventional FPP images. Conclusion Non-ECG-gated FPP imaging using optimized continuous golden-angle radial acquisition achieves desirable image quality (i.e., adequate myocardial contrast, high spatial resolution, and minimal artifacts) in the setting of ischemia. Magn Reson Med 72:1620-1628, 2014. © 2014 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR] |
| Copyright of Magnetic Resonance in Medicine is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 99368676 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Non-ECG-gated myocardial perfusion MRI using continuous magnetization-driven radial sampling. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sharif%2C+Behzad%22">Sharif, Behzad</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Dharmakumar%2C+Rohan%22">Dharmakumar, Rohan</searchLink><relatesTo>1,2,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Arsanjani%2C+Reza%22">Arsanjani, Reza</searchLink><relatesTo>1,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Thomson%2C+Louise%22">Thomson, Louise</searchLink><relatesTo>4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Bairey+Merz%2C+C%2E+Noel%22">Bairey Merz, C. Noel</searchLink><relatesTo>2,3,4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Berman%2C+Daniel+S%2E%22">Berman, Daniel S.</searchLink><relatesTo>1,3,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Debiao%22">Li, Debiao</searchLink><relatesTo>1,2,3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Magnetic+Resonance+in+Medicine%22">Magnetic Resonance in Medicine</searchLink>. Dec2014, Vol. 72 Issue 6, p1620-1628. 9p. – Name: Abstract Label: Abstract Group: Ab Data: Purpose Establishing a high-resolution non-ECG-gated first-pass perfusion (FPP) cardiac MRI technique may improve accessibility and diagnostic capability of FPP imaging. We propose a non-ECG-gated FPP imaging technique using continuous magnetization-driven golden-angle radial acquisition. The main purpose of this preliminary study is to evaluate whether, in the simple case of single-slice two-dimensional imaging, adequate myocardial contrast can be obtained for accurate visualization of hypoperfused territories in the setting of myocardial ischemia. Methods A T1-weighted pulse sequence with continuous golden-angle radial sampling was developed for non-ECG-gated FPP imaging. A sliding-window scheme with no temporal acceleration was used to reconstruct 8 frames/s. Canines were imaged at 3T with and without coronary stenosis using the proposed scheme and a conventional magnetization-prepared ECG-gated FPP method. Results Our studies showed that the proposed non-ECG-gated method is capable of generating high-resolution (1.7 × 1.7 × 6 mm3) artifact-free FPP images of a single slice at high heart rates (92 ± 21 beats/min), while matching the performance of conventional FPP imaging in terms of hypoperfused-to-normal myocardial contrast-to-noise ratio (proposed: 5.18 ± 0.70, conventional: 4.88 ± 0.43). Furthermore, the detected perfusion defect areas were consistent with the conventional FPP images. Conclusion Non-ECG-gated FPP imaging using optimized continuous golden-angle radial acquisition achieves desirable image quality (i.e., adequate myocardial contrast, high spatial resolution, and minimal artifacts) in the setting of ischemia. Magn Reson Med 72:1620-1628, 2014. © 2014 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Magnetic Resonance in Medicine is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/mrm.25074 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 1620 Titles: – TitleFull: Non-ECG-gated myocardial perfusion MRI using continuous magnetization-driven radial sampling. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sharif, Behzad – PersonEntity: Name: NameFull: Dharmakumar, Rohan – PersonEntity: Name: NameFull: Arsanjani, Reza – PersonEntity: Name: NameFull: Thomson, Louise – PersonEntity: Name: NameFull: Bairey Merz, C. Noel – PersonEntity: Name: NameFull: Berman, Daniel S. – PersonEntity: Name: NameFull: Li, Debiao IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 07403194 Numbering: – Type: volume Value: 72 – Type: issue Value: 6 Titles: – TitleFull: Magnetic Resonance in Medicine Type: main |
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