Navigator artifact reduction in three-dimensional late gadolinium enhancement imaging of the atria
Purpose Navigator‐gated three‐dimensional (3D) late gadolinium enhancement (LGE) imaging demonstrates scarring following ablation of atrial fibrillation. An artifact originating from the slice‐selective navigator‐restore pulse is frequently present in the right pulmonary veins (PVs), obscuring the w...
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| Veröffentlicht in: | Magnetic resonance in medicine 2014-09, Vol.72 (3), p.779-785 |
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| creator | Keegan, Jennifer Drivas, Peter Firmin, David N. |
| description | Purpose
Navigator‐gated three‐dimensional (3D) late gadolinium enhancement (LGE) imaging demonstrates scarring following ablation of atrial fibrillation. An artifact originating from the slice‐selective navigator‐restore pulse is frequently present in the right pulmonary veins (PVs), obscuring the walls and making quantification of enhancement difficult. We describe a simple sequence modification to greatly reduce or remove this artifact.
Methods
A navigator‐gated inversion‐prepared gradient echo sequence was modified so that the slice‐selective navigator‐restore pulse was delayed in time from the nonselective preparation (NAV‐restore‐delayed). Both NAV‐restore‐delayed and conventional 3D LGE acquisitions were performed in 11 patients and the results compared.
Results
One patient was excluded due to severe respiratory motion artifact in both NAV‐restore‐delayed and conventional acquisitions. Moderate to severe artifact was present in 9 of the remaining 10 patients using the conventional sequence and was considerably reduced when using the NAV‐restore‐delayed sequence (ostial PV to blood pool ratio, 1.7 ± 0.5 versus 1.1 ± 0.2, respectively [P |
| doi_str_mv | 10.1002/mrm.24967 |
| format | Article |
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Navigator‐gated three‐dimensional (3D) late gadolinium enhancement (LGE) imaging demonstrates scarring following ablation of atrial fibrillation. An artifact originating from the slice‐selective navigator‐restore pulse is frequently present in the right pulmonary veins (PVs), obscuring the walls and making quantification of enhancement difficult. We describe a simple sequence modification to greatly reduce or remove this artifact.
Methods
A navigator‐gated inversion‐prepared gradient echo sequence was modified so that the slice‐selective navigator‐restore pulse was delayed in time from the nonselective preparation (NAV‐restore‐delayed). Both NAV‐restore‐delayed and conventional 3D LGE acquisitions were performed in 11 patients and the results compared.
Results
One patient was excluded due to severe respiratory motion artifact in both NAV‐restore‐delayed and conventional acquisitions. Moderate to severe artifact was present in 9 of the remaining 10 patients using the conventional sequence and was considerably reduced when using the NAV‐restore‐delayed sequence (ostial PV to blood pool ratio, 1.7 ± 0.5 versus 1.1 ± 0.2, respectively [P < 0.0001]; qualitative artifact scores, 2.8 ± 1.1 versus 1.2 ± 0.4, respectively [P < 0.001]). While navigator signal‐to‐noise ratio was reduced with the NAV‐restore‐delayed sequence, respiratory motion compensation was unaffected.
Conclusions
Shifting the navigator‐restore pulse significantly reduces or eliminates navigator artifact. This simple modification improves the quality of 3D LGE imaging and potentially aids late enhancement quantification in the atria. Magn Reson Med 72:779–785, 2014. © 2013 Wiley Periodicals, Inc.</description><identifier>ISSN: 0740-3194</identifier><identifier>EISSN: 1522-2594</identifier><identifier>DOI: 10.1002/mrm.24967</identifier><identifier>PMID: 24151231</identifier><identifier>CODEN: MRMEEN</identifier><language>eng</language><publisher>United States: Blackwell Publishing Ltd</publisher><subject>Contrast Media ; Echo-Planar Imaging - methods ; Heart Atria - anatomy & histology ; Humans ; Image Enhancement - methods ; Image Processing, Computer-Assisted - methods ; Imaging, Three-Dimensional - methods ; late gadolinium enhancement imaging ; navigator ; Organometallic Compounds ; pulmonary veins ; Pulmonary Veins - anatomy & histology ; Signal-To-Noise Ratio</subject><ispartof>Magnetic resonance in medicine, 2014-09, Vol.72 (3), p.779-785</ispartof><rights>Copyright © 2013 Wiley Periodicals, Inc.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5997-ceba803a130f297786c071a9235eb15921151c3120519e02af9ec97ac6adf2453</citedby><cites>FETCH-LOGICAL-c5997-ceba803a130f297786c071a9235eb15921151c3120519e02af9ec97ac6adf2453</cites></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.24967$$EPDF$$P50$$Gwiley$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fmrm.24967$$EHTML$$P50$$Gwiley$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,1411,1427,27901,27902,45550,45551,46384,46808</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24151231$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Keegan, Jennifer</creatorcontrib><creatorcontrib>Drivas, Peter</creatorcontrib><creatorcontrib>Firmin, David N.</creatorcontrib><title>Navigator artifact reduction in three-dimensional late gadolinium enhancement imaging of the atria</title><title>Magnetic resonance in medicine</title><addtitle>Magn. Reson. Med</addtitle><description>Purpose
Navigator‐gated three‐dimensional (3D) late gadolinium enhancement (LGE) imaging demonstrates scarring following ablation of atrial fibrillation. An artifact originating from the slice‐selective navigator‐restore pulse is frequently present in the right pulmonary veins (PVs), obscuring the walls and making quantification of enhancement difficult. We describe a simple sequence modification to greatly reduce or remove this artifact.
Methods
A navigator‐gated inversion‐prepared gradient echo sequence was modified so that the slice‐selective navigator‐restore pulse was delayed in time from the nonselective preparation (NAV‐restore‐delayed). Both NAV‐restore‐delayed and conventional 3D LGE acquisitions were performed in 11 patients and the results compared.
Results
One patient was excluded due to severe respiratory motion artifact in both NAV‐restore‐delayed and conventional acquisitions. Moderate to severe artifact was present in 9 of the remaining 10 patients using the conventional sequence and was considerably reduced when using the NAV‐restore‐delayed sequence (ostial PV to blood pool ratio, 1.7 ± 0.5 versus 1.1 ± 0.2, respectively [P < 0.0001]; qualitative artifact scores, 2.8 ± 1.1 versus 1.2 ± 0.4, respectively [P < 0.001]). While navigator signal‐to‐noise ratio was reduced with the NAV‐restore‐delayed sequence, respiratory motion compensation was unaffected.
Conclusions
Shifting the navigator‐restore pulse significantly reduces or eliminates navigator artifact. This simple modification improves the quality of 3D LGE imaging and potentially aids late enhancement quantification in the atria. Magn Reson Med 72:779–785, 2014. © 2013 Wiley Periodicals, Inc.</description><subject>Contrast Media</subject><subject>Echo-Planar Imaging - methods</subject><subject>Heart Atria - anatomy & histology</subject><subject>Humans</subject><subject>Image Enhancement - methods</subject><subject>Image Processing, Computer-Assisted - methods</subject><subject>Imaging, Three-Dimensional - methods</subject><subject>late gadolinium enhancement imaging</subject><subject>navigator</subject><subject>Organometallic Compounds</subject><subject>pulmonary veins</subject><subject>Pulmonary Veins - anatomy & histology</subject><subject>Signal-To-Noise Ratio</subject><issn>0740-3194</issn><issn>1522-2594</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>EIF</sourceid><recordid>eNqNkc1LHEEQxZuQEDcmh_wDoSGX5DDan9v2USRRye4KISHHpranZm2dD-3uifrf2-uoh0DAU0HV7z0e9Qj5yNkeZ0zsd7HbE8rOzSsy41qISmirXpMZM4pVklu1Q96ldMEYs9aot2RHKK65kHxG1iv4GzaQh0gh5tCAzzRiPfochp6GnubziFjVocM-lRW0tIWMdAP10IY-jB3F_hx6jwXINHSwCf2GDk0RIoUcA7wnbxpoE354nLvk9_dvv45OqsXZ8enR4aLyusSqPK7hgEngkjXCGnMw98xwsEJqXHNtBS-ZveSCaW6RCWgsemvAz6FuhNJyl3yZfK_icD1iyq4LyWPbQo_DmBzXc8al5sy8ANXSMKWMKujnf9CLYYzlDxPFt0G31NeJ8nFIKWLjrmL5RbxznLltR6505B46KuynR8dx3WH9TD6VUoD9CbgJLd7938ktfy6fLKtJEVLG22cFxEtXrka7P6tjt_yxkMzKlRPyHtgUqP8</recordid><startdate>201409</startdate><enddate>201409</enddate><creator>Keegan, Jennifer</creator><creator>Drivas, Peter</creator><creator>Firmin, David N.</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>24P</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>K9.</scope><scope>M7Z</scope><scope>P64</scope><scope>7X8</scope><scope>7QO</scope></search><sort><creationdate>201409</creationdate><title>Navigator artifact reduction in three-dimensional late gadolinium enhancement imaging of the atria</title><author>Keegan, Jennifer ; Drivas, Peter ; Firmin, David N.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5997-ceba803a130f297786c071a9235eb15921151c3120519e02af9ec97ac6adf2453</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Contrast Media</topic><topic>Echo-Planar Imaging - methods</topic><topic>Heart Atria - anatomy & histology</topic><topic>Humans</topic><topic>Image Enhancement - methods</topic><topic>Image Processing, Computer-Assisted - methods</topic><topic>Imaging, Three-Dimensional - methods</topic><topic>late gadolinium enhancement imaging</topic><topic>navigator</topic><topic>Organometallic Compounds</topic><topic>pulmonary veins</topic><topic>Pulmonary Veins - anatomy & histology</topic><topic>Signal-To-Noise Ratio</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Keegan, Jennifer</creatorcontrib><creatorcontrib>Drivas, Peter</creatorcontrib><creatorcontrib>Firmin, David N.</creatorcontrib><collection>Istex</collection><collection>Wiley-Blackwell Open Access Titles</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Biochemistry Abstracts 1</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><collection>Biotechnology Research Abstracts</collection><jtitle>Magnetic resonance in medicine</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Keegan, Jennifer</au><au>Drivas, Peter</au><au>Firmin, David N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Navigator artifact reduction in three-dimensional late gadolinium enhancement imaging of the atria</atitle><jtitle>Magnetic resonance in medicine</jtitle><addtitle>Magn. Reson. Med</addtitle><date>2014-09</date><risdate>2014</risdate><volume>72</volume><issue>3</issue><spage>779</spage><epage>785</epage><pages>779-785</pages><issn>0740-3194</issn><eissn>1522-2594</eissn><coden>MRMEEN</coden><abstract>Purpose
Navigator‐gated three‐dimensional (3D) late gadolinium enhancement (LGE) imaging demonstrates scarring following ablation of atrial fibrillation. An artifact originating from the slice‐selective navigator‐restore pulse is frequently present in the right pulmonary veins (PVs), obscuring the walls and making quantification of enhancement difficult. We describe a simple sequence modification to greatly reduce or remove this artifact.
Methods
A navigator‐gated inversion‐prepared gradient echo sequence was modified so that the slice‐selective navigator‐restore pulse was delayed in time from the nonselective preparation (NAV‐restore‐delayed). Both NAV‐restore‐delayed and conventional 3D LGE acquisitions were performed in 11 patients and the results compared.
Results
One patient was excluded due to severe respiratory motion artifact in both NAV‐restore‐delayed and conventional acquisitions. Moderate to severe artifact was present in 9 of the remaining 10 patients using the conventional sequence and was considerably reduced when using the NAV‐restore‐delayed sequence (ostial PV to blood pool ratio, 1.7 ± 0.5 versus 1.1 ± 0.2, respectively [P < 0.0001]; qualitative artifact scores, 2.8 ± 1.1 versus 1.2 ± 0.4, respectively [P < 0.001]). While navigator signal‐to‐noise ratio was reduced with the NAV‐restore‐delayed sequence, respiratory motion compensation was unaffected.
Conclusions
Shifting the navigator‐restore pulse significantly reduces or eliminates navigator artifact. This simple modification improves the quality of 3D LGE imaging and potentially aids late enhancement quantification in the atria. Magn Reson Med 72:779–785, 2014. © 2013 Wiley Periodicals, Inc.</abstract><cop>United States</cop><pub>Blackwell Publishing Ltd</pub><pmid>24151231</pmid><doi>10.1002/mrm.24967</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Contrast Media Echo-Planar Imaging - methods Heart Atria - anatomy & histology Humans Image Enhancement - methods Image Processing, Computer-Assisted - methods Imaging, Three-Dimensional - methods late gadolinium enhancement imaging navigator Organometallic Compounds pulmonary veins Pulmonary Veins - anatomy & histology Signal-To-Noise Ratio |
| title | Navigator artifact reduction in three-dimensional late gadolinium enhancement imaging of the atria |
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