{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T18:10:22Z","timestamp":1790964622490,"version":"4.1.0"},"reference-count":29,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2022,8,15]],"date-time":"2022-08-15T00:00:00Z","timestamp":1660521600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000070","name":"National Institute of Biomedical Imaging and Bioengineering","doi-asserted-by":"publisher","award":["P41EB029460"],"award-info":[{"award-number":["P41EB029460"]}],"id":[{"id":"10.13039\/100000070","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Magnetic Resonance in Med"],"published-print":{"date-parts":[[2022,12]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>\n                      Ultra\u2010high field MR imaging lacks B\n                      <jats:sub>1<\/jats:sub>\n                      <jats:sup>+<\/jats:sup>\n                      inhomogeneity due to shorter RF wavelengths used at higher field strengths compared to human anatomy. CEST techniques tend to be highly susceptible to B\n                      <jats:sub>1<\/jats:sub>\n                      <jats:sup>+<\/jats:sup>\n                      inhomogeneities due to a high and uniform B\n                      <jats:sub>1<\/jats:sub>\n                      <jats:sup>+<\/jats:sup>\n                      field being necessary to create the endogenous contrast. High\u2010permittivity dielectric pads have seen increasing usage in MR imaging due to their ability to tailor the spatial distribution of the B\n                      <jats:sub>1<\/jats:sub>\n                      <jats:sup>+<\/jats:sup>\n                      field produced. The purpose of this work is to demonstrate that dielectric materials can be used to improve glutamate weighted CEST (gluCEST) at 7T.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Theory and Methods<\/jats:title>\n                    <jats:p>GluCEST images were acquired on a 7T system on six healthy volunteers. Aqueous calcium titanate pads, with a permittivity of approximately 110, were placed on either side in the subject\u2032s head near the temporal lobes. A post\u2010processing correction algorithm was implemented in combination with dielectric padding to compare contrast improvement. Tissue segmentation was performed to assess the effect of dielectric pads on gray and white matter separately.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>GluCEST images demonstrated contrast enhancement in the lateral temporal lobe regions with dielectric pad placement. Tissue segmentation analysis showed an increase in correction effectiveness within the gray matter tissue compared to white matter tissue. Statistical testing suggested a significant difference in gluCEST contrast when pads were used and showed a difference in the gray matter tissue segment.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>\n                      The use of dielectric pads improved the B\n                      <jats:sub>1<\/jats:sub>\n                      <jats:sup>+<\/jats:sup>\n                      field homogeneity and enhanced gluCEST contrast for all subjects when compared to data that did not incorporate padding.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/mrm.29409","type":"journal-article","created":{"date-parts":[[2022,8,15]],"date-time":"2022-08-15T03:54:56Z","timestamp":1660535696000},"page":"2475-2484","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Repeatability of\n                    <scp>\n                      B\n                      <sub>1<\/sub>\n                    <\/scp>\n                    <sup>+<\/sup>\n                    inhomogeneity correction of volumetric (\n                    <scp>3D<\/scp>\n                    ) glutamate\n                    <scp>CEST<\/scp>\n                    via\n                    <scp>High\u2010permittivity<\/scp>\n                    dielectric padding at\n                    <scp>7T<\/scp>"],"prefix":"10.1002","volume":"88","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3566-4010","authenticated-orcid":false,"given":"Paul S.","family":"Jacobs","sequence":"first","affiliation":[{"name":"Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology University of Pennsylvania   Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2480-4164","authenticated-orcid":false,"given":"Blake","family":"Benyard","sequence":"additional","affiliation":[{"name":"Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology University of Pennsylvania   Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Abigail","family":"Cember","sequence":"additional","affiliation":[{"name":"Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology University of Pennsylvania   Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3644-5656","authenticated-orcid":false,"given":"Ravi Prakash Reddy","family":"Nanga","sequence":"additional","affiliation":[{"name":"Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology University of Pennsylvania   Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Quy","family":"Cao","sequence":"additional","affiliation":[{"name":"Penn Statistics in Imaging and Visualization Center, Department of Biostatistics, Epidemiology, and Informatics University of Pennsylvania  Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0454-3112","authenticated-orcid":false,"given":"M. Dylan","family":"Tisdall","sequence":"additional","affiliation":[{"name":"Department of Radiology University of Pennsylvania  Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Neil","family":"Wilson","sequence":"additional","affiliation":[{"name":"Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology University of Pennsylvania   Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sandhitsu","family":"Das","sequence":"additional","affiliation":[{"name":"Department of Neurology University of Pennsylvania  Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kathryn A.","family":"Davis","sequence":"additional","affiliation":[{"name":"Department of Neurology University of Pennsylvania  Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John","family":"Detre","sequence":"additional","affiliation":[{"name":"Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology University of Pennsylvania   Philadelphia Pennsylvania USA"},{"name":"Department of Neurology University of Pennsylvania  Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Roalf","sequence":"additional","affiliation":[{"name":"Department of Psychiatry University of Pennsylvania  Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ravinder","family":"Reddy","sequence":"additional","affiliation":[{"name":"Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology University of Pennsylvania   Philadelphia Pennsylvania USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2022,8,15]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.3174\/ajnr.A6344"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.pnmrs.2018.06.001"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1186\/s40658-016-0155-2"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.1007\/s40134-013-0010-3"},{"key":"e_1_2_8_6_1","doi-asserted-by":"publisher","DOI":"10.1038\/nm.2615"},{"key":"e_1_2_8_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/nm.3436"},{"key":"e_1_2_8_8_1","doi-asserted-by":"publisher","DOI":"10.1126\/scitranslmed.aaa7095"},{"key":"e_1_2_8_9_1","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.23250"},{"key":"e_1_2_8_10_1","article-title":"Glutamate weighted CEST (gluCEST) imaging for mapping neurometabolism: an update on the state of the art and emerging findings from in vivo applications","volume":"34","author":"Cember ATJ","year":"2022","journal-title":"NMR Biomed"},{"key":"e_1_2_8_11_1","unstructured":"NangaRP.Feasibility of partial 3D GluCEST in healthy human adults at 7.0T. 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