Navigator‐based slice tracking for kidney pCASL using spin‐echo EPI acquisition.
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| Title: | Navigator‐based slice tracking for kidney pCASL using spin‐echo EPI acquisition. |
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| Authors: | Zhang, Ke1,2 (AUTHOR), Triphan, Simon M. F.1 (AUTHOR), Ziener, Christian H.2 (AUTHOR), Jende, Johann M. E.3 (AUTHOR), Kauczor, Hans‐Ulrich1 (AUTHOR), Schlemmer, Heinz‐Peter2 (AUTHOR), Sedlaczek, Oliver1,2 (AUTHOR), Kurz, Felix T.2,3 (AUTHOR) f.kurz@dkfz-heidelberg.de |
| Source: | Magnetic Resonance in Medicine. Jul2023, Vol. 90 Issue 1, p231-239. 9p. |
| Subjects: | Kidneys, Spin labels |
| Abstract: | Purpose: To apply a navigator‐based slice‐tracking method to prospectively compensate respiratory motion for kidney pseudo‐continuous arterial spin labeling (pCASL), using spin‐echo (SE) EPI acquisition. Methods: A single gradient‐echo slice selection and projection readout at the location of the diaphragm along the inferior–superior direction was applied as a navigator. Navigator acquisition and fat suppression were inserted before each transverse imaging slice of the readouts of a 2D‐SE‐EPI‐based pCASL sequence. Motion information was calculated after exclusion of the signal saturation in the navigator signal caused by EPI excitations. The motion information was then used to directly adjust the slice positioning in real time. Results: The respiratory motion from the navigator signal was calculated, and slice positioning was changed in real time based on the motion information. We could show that motion compensation reduces kidney movement, and that the coefficients of variation across renal perfusion values were significantly reduced when motion correction was applied. The average reduction of coefficients of variation was approximately 20%, resulting in a more accurate and detailed structure of the respective perfusion maps. Conclusions: This study demonstrates the feasibility of a navigator‐based slice‐tracking technique in kidney imaging with a SE‐EPI readout pCASL sequence to reduce kidney motion. [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: 163412728 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Navigator‐based slice tracking for kidney pCASL using spin‐echo EPI acquisition. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Ke%22">Zhang, Ke</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Triphan%2C+Simon+M%2E+F%2E%22">Triphan, Simon M. F.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ziener%2C+Christian+H%2E%22">Ziener, Christian H.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jende%2C+Johann+M%2E+E%2E%22">Jende, Johann M. E.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kauczor%2C+Hans‐Ulrich%22">Kauczor, Hans‐Ulrich</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schlemmer%2C+Heinz‐Peter%22">Schlemmer, Heinz‐Peter</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sedlaczek%2C+Oliver%22">Sedlaczek, Oliver</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kurz%2C+Felix+T%2E%22">Kurz, Felix T.</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> f.kurz@dkfz-heidelberg.de</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Magnetic+Resonance+in+Medicine%22">Magnetic Resonance in Medicine</searchLink>. Jul2023, Vol. 90 Issue 1, p231-239. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Kidneys%22">Kidneys</searchLink><br /><searchLink fieldCode="DE" term="%22Spin+labels%22">Spin labels</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Purpose: To apply a navigator‐based slice‐tracking method to prospectively compensate respiratory motion for kidney pseudo‐continuous arterial spin labeling (pCASL), using spin‐echo (SE) EPI acquisition. Methods: A single gradient‐echo slice selection and projection readout at the location of the diaphragm along the inferior–superior direction was applied as a navigator. Navigator acquisition and fat suppression were inserted before each transverse imaging slice of the readouts of a 2D‐SE‐EPI‐based pCASL sequence. Motion information was calculated after exclusion of the signal saturation in the navigator signal caused by EPI excitations. The motion information was then used to directly adjust the slice positioning in real time. Results: The respiratory motion from the navigator signal was calculated, and slice positioning was changed in real time based on the motion information. We could show that motion compensation reduces kidney movement, and that the coefficients of variation across renal perfusion values were significantly reduced when motion correction was applied. The average reduction of coefficients of variation was approximately 20%, resulting in a more accurate and detailed structure of the respective perfusion maps. Conclusions: This study demonstrates the feasibility of a navigator‐based slice‐tracking technique in kidney imaging with a SE‐EPI readout pCASL sequence to reduce kidney motion. [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.29621 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 231 Subjects: – SubjectFull: Kidneys Type: general – SubjectFull: Spin labels Type: general Titles: – TitleFull: Navigator‐based slice tracking for kidney pCASL using spin‐echo EPI acquisition. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhang, Ke – PersonEntity: Name: NameFull: Triphan, Simon M. F. – PersonEntity: Name: NameFull: Ziener, Christian H. – PersonEntity: Name: NameFull: Jende, Johann M. E. – PersonEntity: Name: NameFull: Kauczor, Hans‐Ulrich – PersonEntity: Name: NameFull: Schlemmer, Heinz‐Peter – PersonEntity: Name: NameFull: Sedlaczek, Oliver – PersonEntity: Name: NameFull: Kurz, Felix T. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 07403194 Numbering: – Type: volume Value: 90 – Type: issue Value: 1 Titles: – TitleFull: Magnetic Resonance in Medicine Type: main |
| ResultId | 1 |
