In-plane simultaneous multisegment imaging using a 2D RF pulse
© 2021 International Society for Magnetic Resonance in Medicine..
PURPOSE: To develop an in-plane simultaneous multisegment (IP-SMS) imaging technique using a 2D-RF pulse and to demonstrate its ability to achieve high spatial resolution in EPI while reducing image distortion.
METHODS: The proposed IP-SMS technique takes advantage of periodic replicates of the excitation profile of a 2D-RF pulse to simultaneously excite multiple segments within a slice. These segments were acquired over a reduced FOV and separated using a joint GRAPPA reconstruction by leveraging virtual coils that combined the physical coil sensitivity and 2D-RF pulse spatial response. Two excitations were used with complementary spatial response profiles to adequately cover a full FOV, producing a full-FOV image that had the benefits of reduced FOV with high spatial resolution and reduced distortion. The IP-SMS technique was implemented in a diffusion-weighted single-shot EPI sequence. Experimental demonstrations were performed on a phantom and healthy human brain.
RESULTS: In the phantom experiment, IP-SMS enabled a four-fold acceleration using an eight-channel coil without causing residual aliasing artifacts. In the human brain experiment, diffusion-weighted images with high in-plane resolution (1 × 1 mm2 ) and substantially reduced image distortion were obtained in all imaging planes in comparison with a commercial diffusion-weighted EPI sequence. The capability of IP-SMS for contiguous whole-brain coverage was also demonstrated.
CONCLUSION: The proposed IP-SMS technique can realize the benefits of reduced-FOV imaging while achieving a full-FOV coverage with good image quality and time efficiency.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:87 |
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| Enthalten in: |
Magnetic resonance in medicine - 87(2022), 1 vom: 05. Jan., Seite 263-271 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Sun, Kaibao [VerfasserIn] |
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| Links: |
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| Themen: |
2D RF pulse |
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| Anmerkungen: |
Date Completed 31.01.2022 Date Revised 02.01.2023 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1002/mrm.28956 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM328949574 |
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| 245 | 1 | 0 | |a In-plane simultaneous multisegment imaging using a 2D RF pulse |
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| 500 | |a Date Completed 31.01.2022 | ||
| 500 | |a Date Revised 02.01.2023 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2021 International Society for Magnetic Resonance in Medicine. | ||
| 520 | |a PURPOSE: To develop an in-plane simultaneous multisegment (IP-SMS) imaging technique using a 2D-RF pulse and to demonstrate its ability to achieve high spatial resolution in EPI while reducing image distortion | ||
| 520 | |a METHODS: The proposed IP-SMS technique takes advantage of periodic replicates of the excitation profile of a 2D-RF pulse to simultaneously excite multiple segments within a slice. These segments were acquired over a reduced FOV and separated using a joint GRAPPA reconstruction by leveraging virtual coils that combined the physical coil sensitivity and 2D-RF pulse spatial response. Two excitations were used with complementary spatial response profiles to adequately cover a full FOV, producing a full-FOV image that had the benefits of reduced FOV with high spatial resolution and reduced distortion. The IP-SMS technique was implemented in a diffusion-weighted single-shot EPI sequence. Experimental demonstrations were performed on a phantom and healthy human brain | ||
| 520 | |a RESULTS: In the phantom experiment, IP-SMS enabled a four-fold acceleration using an eight-channel coil without causing residual aliasing artifacts. In the human brain experiment, diffusion-weighted images with high in-plane resolution (1 × 1 mm2 ) and substantially reduced image distortion were obtained in all imaging planes in comparison with a commercial diffusion-weighted EPI sequence. The capability of IP-SMS for contiguous whole-brain coverage was also demonstrated | ||
| 520 | |a CONCLUSION: The proposed IP-SMS technique can realize the benefits of reduced-FOV imaging while achieving a full-FOV coverage with good image quality and time efficiency | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, N.I.H., Extramural | |
| 650 | 4 | |a 2D RF pulse | |
| 650 | 4 | |a DWI | |
| 650 | 4 | |a parallel imaging | |
| 650 | 4 | |a reduced FOV | |
| 650 | 4 | |a simultaneous multisegment imaging | |
| 700 | 1 | |a Zhong, Zheng |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Zhongbiao |e verfasserin |4 aut | |
| 700 | 1 | |a Dan, Guangyu |e verfasserin |4 aut | |
| 700 | 1 | |a Karaman, M Muge |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Xiaohong Joe |e verfasserin |4 aut | |
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