Spectrally selective B1-insensitive T2 magnetization preparation sequence
A T2 magnetization‐preparation (T2 Prep) sequence is proposed that is insensitive to B1 field variations and simultaneously provides fat suppression without any further increase in specific absorption rate (SAR). Increased B1 inhomogeneity at higher magnetic field strength (B0 ≥ 3T) necessitates a p...
Gespeichert in:
| Veröffentlicht in: | Magnetic resonance in medicine 2009-06, Vol.61 (6), p.1326-1335 |
|---|---|
| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 1335 |
|---|---|
| container_issue | 6 |
| container_start_page | 1326 |
| container_title | Magnetic resonance in medicine |
| container_volume | 61 |
| creator | Nezafat, Reza Ouwerkerk, Ronald Derbyshire, Andrew J. Stuber, Matthias McVeigh, Elliot R. |
| description | A T2 magnetization‐preparation (T2 Prep) sequence is proposed that is insensitive to B1 field variations and simultaneously provides fat suppression without any further increase in specific absorption rate (SAR). Increased B1 inhomogeneity at higher magnetic field strength (B0 ≥ 3T) necessitates a preparation sequence that is less sensitive to B1 variations. For the proposed technique, T2 weighting in the image is achieved using a segmented B1‐insensitive rotation (BIR‐4) adiabatic pulse by inserting two equally long delays, one after the initial reverse adiabatic half passage (AHP), and the other before the final AHP segment of a BIR‐4 pulse. This sequence yields T2 weighting with both B1 and B0 insensitivity. To simultaneously suppress fat signal (at the cost of B0 insensitivity), the second delay is prolonged so that fat accumulates additional phase due to its chemical shift. Numerical simulations as well as phantom and in vivo image acquisitions were performed to show the efficacy of the proposed technique. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc. |
| doi_str_mv | 10.1002/mrm.21742 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_pubme</sourceid><recordid>TN_cdi_proquest_miscellaneous_883019934</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>883019934</sourcerecordid><originalsourceid>FETCH-LOGICAL-i2342-5faaedb335405ab1b2df1b8aa6e0fcdf7aacd29dfbf67e549ac52bb786fcccfd3</originalsourceid><addsrcrecordid>eNp9kMtOwzAQRS0EoqWw4AdQVrBK61fqZAkVLUUtSKWIpeU4Y2RI0hCnQPl63AewY-Vrz7kznovQKcFdgjHtFXXRpURwuofaJKI0pFHC91EbC45DRhLeQkfOvWCMk0TwQ9QiiX9NMGuj8UMFuqlVnq8CB7nX9h2CKxLa0kHp7OY6p0Ghnkto7Jdq7KIMqhoqVW-1g7cllBqO0YFRuYOT3dlBj8Pr-eAmnNyPxoPLSWgp4zSMjFKQpYxFHEcqJSnNDEljpfqAjc6MUEpnNMlMavoCIp4oHdE0FXHfaK1NxjroYtu3qhd-smtkYZ2GPFclLJZOxjHDfjnGPXn-L9kXjPhfMA-e7cBlWkAmq9oWql7Jn5g80NsCHzaH1V8dy3X-0ucvN_nL6Wy6Ed4Rbh3WNfD561D163qsiOTT3UjestndZEaHUrBv4XaJCg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>67315403</pqid></control><display><type>article</type><title>Spectrally selective B1-insensitive T2 magnetization preparation sequence</title><source>MEDLINE</source><source>Wiley Online Library Journals Frontfile Complete</source><source>Wiley Free Content</source><creator>Nezafat, Reza ; Ouwerkerk, Ronald ; Derbyshire, Andrew J. ; Stuber, Matthias ; McVeigh, Elliot R.</creator><creatorcontrib>Nezafat, Reza ; Ouwerkerk, Ronald ; Derbyshire, Andrew J. ; Stuber, Matthias ; McVeigh, Elliot R.</creatorcontrib><description>A T2 magnetization‐preparation (T2 Prep) sequence is proposed that is insensitive to B1 field variations and simultaneously provides fat suppression without any further increase in specific absorption rate (SAR). Increased B1 inhomogeneity at higher magnetic field strength (B0 ≥ 3T) necessitates a preparation sequence that is less sensitive to B1 variations. For the proposed technique, T2 weighting in the image is achieved using a segmented B1‐insensitive rotation (BIR‐4) adiabatic pulse by inserting two equally long delays, one after the initial reverse adiabatic half passage (AHP), and the other before the final AHP segment of a BIR‐4 pulse. This sequence yields T2 weighting with both B1 and B0 insensitivity. To simultaneously suppress fat signal (at the cost of B0 insensitivity), the second delay is prolonged so that fat accumulates additional phase due to its chemical shift. Numerical simulations as well as phantom and in vivo image acquisitions were performed to show the efficacy of the proposed technique. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.</description><identifier>ISSN: 0740-3194</identifier><identifier>ISSN: 1522-2594</identifier><identifier>EISSN: 1522-2594</identifier><identifier>DOI: 10.1002/mrm.21742</identifier><identifier>PMID: 19319903</identifier><language>eng</language><publisher>Hoboken: Wiley Subscription Services, Inc., A Wiley Company</publisher><subject>adiabatic RF ; Algorithms ; B1 and B0 homogeneity ; Brain - anatomy & histology ; Brain Chemistry ; contrast enhancement ; fat saturation ; high field imaging ; Humans ; Image Interpretation, Computer-Assisted - methods ; Magnetic Resonance Imaging - instrumentation ; Magnetic Resonance Imaging - methods ; Magnetic Resonance Spectroscopy - methods ; Phantoms, Imaging ; Radio Waves ; Signal Processing, Computer-Assisted</subject><ispartof>Magnetic resonance in medicine, 2009-06, Vol.61 (6), p.1326-1335</ispartof><rights>Copyright © 2009 Wiley‐Liss, Inc.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fmrm.21742$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fmrm.21742$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,776,780,1411,1427,27903,27904,45553,45554,46387,46811</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19319903$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Nezafat, Reza</creatorcontrib><creatorcontrib>Ouwerkerk, Ronald</creatorcontrib><creatorcontrib>Derbyshire, Andrew J.</creatorcontrib><creatorcontrib>Stuber, Matthias</creatorcontrib><creatorcontrib>McVeigh, Elliot R.</creatorcontrib><title>Spectrally selective B1-insensitive T2 magnetization preparation sequence</title><title>Magnetic resonance in medicine</title><addtitle>Magn. Reson. Med</addtitle><description>A T2 magnetization‐preparation (T2 Prep) sequence is proposed that is insensitive to B1 field variations and simultaneously provides fat suppression without any further increase in specific absorption rate (SAR). Increased B1 inhomogeneity at higher magnetic field strength (B0 ≥ 3T) necessitates a preparation sequence that is less sensitive to B1 variations. For the proposed technique, T2 weighting in the image is achieved using a segmented B1‐insensitive rotation (BIR‐4) adiabatic pulse by inserting two equally long delays, one after the initial reverse adiabatic half passage (AHP), and the other before the final AHP segment of a BIR‐4 pulse. This sequence yields T2 weighting with both B1 and B0 insensitivity. To simultaneously suppress fat signal (at the cost of B0 insensitivity), the second delay is prolonged so that fat accumulates additional phase due to its chemical shift. Numerical simulations as well as phantom and in vivo image acquisitions were performed to show the efficacy of the proposed technique. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.</description><subject>adiabatic RF</subject><subject>Algorithms</subject><subject>B1 and B0 homogeneity</subject><subject>Brain - anatomy & histology</subject><subject>Brain Chemistry</subject><subject>contrast enhancement</subject><subject>fat saturation</subject><subject>high field imaging</subject><subject>Humans</subject><subject>Image Interpretation, Computer-Assisted - methods</subject><subject>Magnetic Resonance Imaging - instrumentation</subject><subject>Magnetic Resonance Imaging - methods</subject><subject>Magnetic Resonance Spectroscopy - methods</subject><subject>Phantoms, Imaging</subject><subject>Radio Waves</subject><subject>Signal Processing, Computer-Assisted</subject><issn>0740-3194</issn><issn>1522-2594</issn><issn>1522-2594</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kMtOwzAQRS0EoqWw4AdQVrBK61fqZAkVLUUtSKWIpeU4Y2RI0hCnQPl63AewY-Vrz7kznovQKcFdgjHtFXXRpURwuofaJKI0pFHC91EbC45DRhLeQkfOvWCMk0TwQ9QiiX9NMGuj8UMFuqlVnq8CB7nX9h2CKxLa0kHp7OY6p0Ghnkto7Jdq7KIMqhoqVW-1g7cllBqO0YFRuYOT3dlBj8Pr-eAmnNyPxoPLSWgp4zSMjFKQpYxFHEcqJSnNDEljpfqAjc6MUEpnNMlMavoCIp4oHdE0FXHfaK1NxjroYtu3qhd-smtkYZ2GPFclLJZOxjHDfjnGPXn-L9kXjPhfMA-e7cBlWkAmq9oWql7Jn5g80NsCHzaH1V8dy3X-0ucvN_nL6Wy6Ed4Rbh3WNfD561D163qsiOTT3UjestndZEaHUrBv4XaJCg</recordid><startdate>200906</startdate><enddate>200906</enddate><creator>Nezafat, Reza</creator><creator>Ouwerkerk, Ronald</creator><creator>Derbyshire, Andrew J.</creator><creator>Stuber, Matthias</creator><creator>McVeigh, Elliot R.</creator><general>Wiley Subscription Services, Inc., A Wiley Company</general><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope><scope>7QO</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope></search><sort><creationdate>200906</creationdate><title>Spectrally selective B1-insensitive T2 magnetization preparation sequence</title><author>Nezafat, Reza ; Ouwerkerk, Ronald ; Derbyshire, Andrew J. ; Stuber, Matthias ; McVeigh, Elliot R.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-i2342-5faaedb335405ab1b2df1b8aa6e0fcdf7aacd29dfbf67e549ac52bb786fcccfd3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>adiabatic RF</topic><topic>Algorithms</topic><topic>B1 and B0 homogeneity</topic><topic>Brain - anatomy & histology</topic><topic>Brain Chemistry</topic><topic>contrast enhancement</topic><topic>fat saturation</topic><topic>high field imaging</topic><topic>Humans</topic><topic>Image Interpretation, Computer-Assisted - methods</topic><topic>Magnetic Resonance Imaging - instrumentation</topic><topic>Magnetic Resonance Imaging - methods</topic><topic>Magnetic Resonance Spectroscopy - methods</topic><topic>Phantoms, Imaging</topic><topic>Radio Waves</topic><topic>Signal Processing, Computer-Assisted</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Nezafat, Reza</creatorcontrib><creatorcontrib>Ouwerkerk, Ronald</creatorcontrib><creatorcontrib>Derbyshire, Andrew J.</creatorcontrib><creatorcontrib>Stuber, Matthias</creatorcontrib><creatorcontrib>McVeigh, Elliot R.</creatorcontrib><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><collection>Biotechnology Research Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Magnetic resonance in medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Nezafat, Reza</au><au>Ouwerkerk, Ronald</au><au>Derbyshire, Andrew J.</au><au>Stuber, Matthias</au><au>McVeigh, Elliot R.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Spectrally selective B1-insensitive T2 magnetization preparation sequence</atitle><jtitle>Magnetic resonance in medicine</jtitle><addtitle>Magn. Reson. Med</addtitle><date>2009-06</date><risdate>2009</risdate><volume>61</volume><issue>6</issue><spage>1326</spage><epage>1335</epage><pages>1326-1335</pages><issn>0740-3194</issn><issn>1522-2594</issn><eissn>1522-2594</eissn><abstract>A T2 magnetization‐preparation (T2 Prep) sequence is proposed that is insensitive to B1 field variations and simultaneously provides fat suppression without any further increase in specific absorption rate (SAR). Increased B1 inhomogeneity at higher magnetic field strength (B0 ≥ 3T) necessitates a preparation sequence that is less sensitive to B1 variations. For the proposed technique, T2 weighting in the image is achieved using a segmented B1‐insensitive rotation (BIR‐4) adiabatic pulse by inserting two equally long delays, one after the initial reverse adiabatic half passage (AHP), and the other before the final AHP segment of a BIR‐4 pulse. This sequence yields T2 weighting with both B1 and B0 insensitivity. To simultaneously suppress fat signal (at the cost of B0 insensitivity), the second delay is prolonged so that fat accumulates additional phase due to its chemical shift. Numerical simulations as well as phantom and in vivo image acquisitions were performed to show the efficacy of the proposed technique. Magn Reson Med, 2009. © 2009 Wiley‐Liss, Inc.</abstract><cop>Hoboken</cop><pub>Wiley Subscription Services, Inc., A Wiley Company</pub><pmid>19319903</pmid><doi>10.1002/mrm.21742</doi><tpages>10</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0740-3194 |
| ispartof | Magnetic resonance in medicine, 2009-06, Vol.61 (6), p.1326-1335 |
| issn | 0740-3194 1522-2594 1522-2594 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_883019934 |
| source | MEDLINE; Wiley Online Library Journals Frontfile Complete; Wiley Free Content |
| subjects | adiabatic RF Algorithms B1 and B0 homogeneity Brain - anatomy & histology Brain Chemistry contrast enhancement fat saturation high field imaging Humans Image Interpretation, Computer-Assisted - methods Magnetic Resonance Imaging - instrumentation Magnetic Resonance Imaging - methods Magnetic Resonance Spectroscopy - methods Phantoms, Imaging Radio Waves Signal Processing, Computer-Assisted |
| title | Spectrally selective B1-insensitive T2 magnetization preparation sequence |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-25T20%3A18%3A28IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_pubme&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Spectrally%20selective%20B1-insensitive%20T2%20magnetization%20preparation%20sequence&rft.jtitle=Magnetic%20resonance%20in%20medicine&rft.au=Nezafat,%20Reza&rft.date=2009-06&rft.volume=61&rft.issue=6&rft.spage=1326&rft.epage=1335&rft.pages=1326-1335&rft.issn=0740-3194&rft.eissn=1522-2594&rft_id=info:doi/10.1002/mrm.21742&rft_dat=%3Cproquest_pubme%3E883019934%3C/proquest_pubme%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=67315403&rft_id=info:pmid/19319903&rfr_iscdi=true |