Towards elimination of the dark-rim artifact in first-pass myocardial perfusion MRI: Removing gibbs ringing effects using optimized radial imaging.
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| Title: | Towards elimination of the dark-rim artifact in first-pass myocardial perfusion MRI: Removing gibbs ringing effects using optimized radial imaging. |
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| Authors: | Sharif, Behzad1,2, Dharmakumar, Rohan1,2, LaBounty, Troy1,3, Arsanjani, Reza1,4, Shufelt, Chrisandra4,5, Thomson, Louise4, Bairey Merz, C. Noel2,4,5, Berman, Daniel S.1,2,4, Li, Debiao1,2,6 |
| Source: | Magnetic Resonance in Medicine. Jul2014, Vol. 72 Issue 1, p124-136. 13p. |
| Abstract: | Purpose Subendocardial dark-rim artifacts (DRAs) remain a major concern in first-pass perfusion (FPP) myocardial MRI and may lower the diagnostic accuracy for detection of ischemia. A major source of DRAs is the 'Gibbs ringing' effect. We propose an optimized radial acquisition strategy aimed at eliminating ringing-induced DRAs in FPP. Theory and Methods By studying the underlying point spread function (PSF), we show that optimized radial sampling with a simple reconstruction method can eliminate the oscillations in the PSF that cause ringing artifacts. We conducted realistic MRI phantom experiments and in vivo studies (n = 12 healthy humans) to evaluate the artifact behavior of the proposed imaging scheme in comparison to a conventional Cartesian imaging protocol. Results Simulations and phantom experiments verified our theoretical expectations. The in vivo studies showed that optimized radial imaging is capable of significantly reducing DRAs in the early myocardial enhancement phase (during which the ringing effect is most prominent and may obscure perfusion defects) while providing similar resolution and image quality compared with conventional Cartesian imaging. Conclusion The developed technical framework and results demonstrate that, in comparison to conventional Cartesian techniques, optimized radial imaging with the proposed optimizations significantly reduces the prevalence and spatial extent of DRAs in FPP imaging. Magn Reson Med 72:124-136, 2014. © 2013 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: 96558766 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Towards elimination of the dark-rim artifact in first-pass myocardial perfusion MRI: Removing gibbs ringing effects using optimized radial imaging. – 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</relatesTo><br /><searchLink fieldCode="AR" term="%22LaBounty%2C+Troy%22">LaBounty, Troy</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Arsanjani%2C+Reza%22">Arsanjani, Reza</searchLink><relatesTo>1,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Shufelt%2C+Chrisandra%22">Shufelt, Chrisandra</searchLink><relatesTo>4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Thomson%2C+Louise%22">Thomson, Louise</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Bairey+Merz%2C+C%2E+Noel%22">Bairey Merz, C. Noel</searchLink><relatesTo>2,4,5</relatesTo><br /><searchLink fieldCode="AR" term="%22Berman%2C+Daniel+S%2E%22">Berman, Daniel S.</searchLink><relatesTo>1,2,4</relatesTo><br /><searchLink fieldCode="AR" term="%22Li%2C+Debiao%22">Li, Debiao</searchLink><relatesTo>1,2,6</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Magnetic+Resonance+in+Medicine%22">Magnetic Resonance in Medicine</searchLink>. Jul2014, Vol. 72 Issue 1, p124-136. 13p. – Name: Abstract Label: Abstract Group: Ab Data: Purpose Subendocardial dark-rim artifacts (DRAs) remain a major concern in first-pass perfusion (FPP) myocardial MRI and may lower the diagnostic accuracy for detection of ischemia. A major source of DRAs is the 'Gibbs ringing' effect. We propose an optimized radial acquisition strategy aimed at eliminating ringing-induced DRAs in FPP. Theory and Methods By studying the underlying point spread function (PSF), we show that optimized radial sampling with a simple reconstruction method can eliminate the oscillations in the PSF that cause ringing artifacts. We conducted realistic MRI phantom experiments and in vivo studies (n = 12 healthy humans) to evaluate the artifact behavior of the proposed imaging scheme in comparison to a conventional Cartesian imaging protocol. Results Simulations and phantom experiments verified our theoretical expectations. The in vivo studies showed that optimized radial imaging is capable of significantly reducing DRAs in the early myocardial enhancement phase (during which the ringing effect is most prominent and may obscure perfusion defects) while providing similar resolution and image quality compared with conventional Cartesian imaging. Conclusion The developed technical framework and results demonstrate that, in comparison to conventional Cartesian techniques, optimized radial imaging with the proposed optimizations significantly reduces the prevalence and spatial extent of DRAs in FPP imaging. Magn Reson Med 72:124-136, 2014. © 2013 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.24913 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 124 Titles: – TitleFull: Towards elimination of the dark-rim artifact in first-pass myocardial perfusion MRI: Removing gibbs ringing effects using optimized radial imaging. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sharif, Behzad – PersonEntity: Name: NameFull: Dharmakumar, Rohan – PersonEntity: Name: NameFull: LaBounty, Troy – PersonEntity: Name: NameFull: Arsanjani, Reza – PersonEntity: Name: NameFull: Shufelt, Chrisandra – 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: 07 Text: Jul2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 07403194 Numbering: – Type: volume Value: 72 – Type: issue Value: 1 Titles: – TitleFull: Magnetic Resonance in Medicine Type: main |
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