Interscan registration using navigator echoes
(c) 2004 Wiley-Liss, Inc..
A common problem in clinical MRI is anatomic misalignment of imaging slices across successive examinations. This unnecessarily complicates the radiologic assessment of anatomic change over time on serial MRI studies. To address this problem, spherical navigator echoes, which can detect rigid body motion in all six degrees of freedom, were used to guide spatial location and orientation adjustments to an exam prescription to match the reference frame of images acquired in an earlier exam. An initial linear navigator echo is also necessary to effect coarse Z translation adjustments prior to fine six degrees of freedom adjustment with a spherical navigator echo. Results of this technique are presented for head image volumes of five volunteers. Each volunteer was imaged on two scanners. In all cases, the reference frame adjustments provided by the navigator echoes substantially improved the alignment of the latter exam and performed well compared to retrospective image-based registration.
| Medienart: |
Artikel |
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| Erscheinungsjahr: |
2004 |
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| Erschienen: |
2004 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:52 |
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| Enthalten in: |
Magnetic resonance in medicine - 52(2004), 6 vom: 01. Dez., Seite 1448-52 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Welch, Edward Brian [VerfasserIn] |
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| Themen: |
Comparative Study |
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| Anmerkungen: |
Date Completed 10.03.2005 Date Revised 17.03.2022 published: Print Citation Status MEDLINE |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM152294503 |
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| 500 | |a Date Revised 17.03.2022 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a (c) 2004 Wiley-Liss, Inc. | ||
| 520 | |a A common problem in clinical MRI is anatomic misalignment of imaging slices across successive examinations. This unnecessarily complicates the radiologic assessment of anatomic change over time on serial MRI studies. To address this problem, spherical navigator echoes, which can detect rigid body motion in all six degrees of freedom, were used to guide spatial location and orientation adjustments to an exam prescription to match the reference frame of images acquired in an earlier exam. An initial linear navigator echo is also necessary to effect coarse Z translation adjustments prior to fine six degrees of freedom adjustment with a spherical navigator echo. Results of this technique are presented for head image volumes of five volunteers. Each volunteer was imaged on two scanners. In all cases, the reference frame adjustments provided by the navigator echoes substantially improved the alignment of the latter exam and performed well compared to retrospective image-based registration | ||
| 650 | 4 | |a Comparative Study | |
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, U.S. Gov't, P.H.S. | |
| 700 | 1 | |a Manduca, Armando |e verfasserin |4 aut | |
| 700 | 1 | |a Grimm, Roger C |e verfasserin |4 aut | |
| 700 | 1 | |a Jack, Clifford R |c Jr |e verfasserin |4 aut | |
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