Reducing view-sharing using compressed sensing in time-resolved contrast-enhanced magnetic resonance angiography.
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| Title: | Reducing view-sharing using compressed sensing in time-resolved contrast-enhanced magnetic resonance angiography. |
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| Authors: | Rapacchi, Stanislas1, Natsuaki, Yutaka2, Plotnik, Adam1, Gabriel, Simon1, Laub, Gerhard2, Finn, J. Paul1, Hu, Peng1 |
| Source: | Magnetic Resonance in Medicine. Aug2015, Vol. 74 Issue 2, p474-481. 8p. |
| Abstract: | Purpose To study temporal and spatial blurring artifacts from k-space view-sharing in time-resolved MR angiography (MRA) and to propose a technique for reducing these artifacts. Methods We acquired k-space data sets using a three-dimensional time-resolved MRA view-sharing sequence and retrospectively reformatted them into two reconstruction frameworks: full view-sharing via time-resolved imaging with stochastic trajectories (TWIST) and minimal k-space view-sharing and compressed sensing (CS-TWIST). The two imaging series differed in temporal footprint but not in temporal frame rate. The artifacts from view-sharing were compared qualitatively and quantitatively in nine patients in addition to a phantom experiment. Results CS-TWIST was able to reduce the imaging temporal footprint by two- to three-fold compared with TWIST, and the overall subjective image quality of CS-TWIST was higher than that for TWIST ( P < 0.05). View sharing caused a delay in the visualization of small blood vessels, and the mean transit time of the carotid artery calculated based on TWIST reconstruction was 0.6 s longer than that for CS-TWIST ( P < 0.01). In thoracic MRA, the shorter temporal footprint decreased the sensitivity to physiological motion blurring, and vessel sharpness was improved by 8.8% ± 6.0% using CS-TWIST ( P < 0.05). Conclusion In time-resolved MRA, the longer temporal footprint due to view-sharing causes spatial and temporal artifacts. CS-TWIST is a promising method for reducing these artifacts. Magn Reson Med 74:474-481, 2015. © 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: 108510262 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Reducing view-sharing using compressed sensing in time-resolved contrast-enhanced magnetic resonance angiography. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Rapacchi%2C+Stanislas%22">Rapacchi, Stanislas</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Natsuaki%2C+Yutaka%22">Natsuaki, Yutaka</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Plotnik%2C+Adam%22">Plotnik, Adam</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gabriel%2C+Simon%22">Gabriel, Simon</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Laub%2C+Gerhard%22">Laub, Gerhard</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Finn%2C+J%2E+Paul%22">Finn, J. Paul</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Hu%2C+Peng%22">Hu, Peng</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Magnetic+Resonance+in+Medicine%22">Magnetic Resonance in Medicine</searchLink>. Aug2015, Vol. 74 Issue 2, p474-481. 8p. – Name: Abstract Label: Abstract Group: Ab Data: Purpose To study temporal and spatial blurring artifacts from k-space view-sharing in time-resolved MR angiography (MRA) and to propose a technique for reducing these artifacts. Methods We acquired k-space data sets using a three-dimensional time-resolved MRA view-sharing sequence and retrospectively reformatted them into two reconstruction frameworks: full view-sharing via time-resolved imaging with stochastic trajectories (TWIST) and minimal k-space view-sharing and compressed sensing (CS-TWIST). The two imaging series differed in temporal footprint but not in temporal frame rate. The artifacts from view-sharing were compared qualitatively and quantitatively in nine patients in addition to a phantom experiment. Results CS-TWIST was able to reduce the imaging temporal footprint by two- to three-fold compared with TWIST, and the overall subjective image quality of CS-TWIST was higher than that for TWIST ( P < 0.05). View sharing caused a delay in the visualization of small blood vessels, and the mean transit time of the carotid artery calculated based on TWIST reconstruction was 0.6 s longer than that for CS-TWIST ( P < 0.01). In thoracic MRA, the shorter temporal footprint decreased the sensitivity to physiological motion blurring, and vessel sharpness was improved by 8.8% ± 6.0% using CS-TWIST ( P < 0.05). Conclusion In time-resolved MRA, the longer temporal footprint due to view-sharing causes spatial and temporal artifacts. CS-TWIST is a promising method for reducing these artifacts. Magn Reson Med 74:474-481, 2015. © 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.25414 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 474 Titles: – TitleFull: Reducing view-sharing using compressed sensing in time-resolved contrast-enhanced magnetic resonance angiography. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Rapacchi, Stanislas – PersonEntity: Name: NameFull: Natsuaki, Yutaka – PersonEntity: Name: NameFull: Plotnik, Adam – PersonEntity: Name: NameFull: Gabriel, Simon – PersonEntity: Name: NameFull: Laub, Gerhard – PersonEntity: Name: NameFull: Finn, J. Paul – PersonEntity: Name: NameFull: Hu, Peng IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 07403194 Numbering: – Type: volume Value: 74 – Type: issue Value: 2 Titles: – TitleFull: Magnetic Resonance in Medicine Type: main |
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