{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T23:39:30Z","timestamp":1791243570763,"version":"4.1.0"},"reference-count":41,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2017,10,16]],"date-time":"2017-10-16T00:00:00Z","timestamp":1508112000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100004061","name":"Oesterreichische Nationalbank","doi-asserted-by":"publisher","award":["16213"],"award-info":[{"award-number":["16213"]}],"id":[{"id":"10.13039\/501100004061","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":[[2018,6]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose<\/jats:title>\n                    <jats:p>\n                      To develop a simple method for combining multi\u2010echo phase information from a number of coils in an array that requires no volume coil or additional scans and yields signal\u2010to\u2010noise ratio\u2010optimal images that reflect only\n                      <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mrm26963-math-0002.png\" xlink:title=\"urn:x-wiley:07403194:media:mrm26963:mrm26963-math-0002\"\/>\n                      \u2010related phase.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Theory and Methods<\/jats:title>\n                    <jats:p>\n                      Two SNR optimal coil combination methods were developed which retrieve the\n                      <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mrm26963-math-0003.png\" xlink:title=\"urn:x-wiley:07403194:media:mrm26963:mrm26963-math-0003\"\/>\n                      \u2010related phase by determining the coil\u2010dependent phase offsets. The first variant, MCPC\u20103D\u2010S, requires the unwrapping of one phase image; the second variant, ASPIRE, allows unwrapping to be avoided if two echoes\n                      <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mrm26963-math-0004.png\" xlink:title=\"urn:x-wiley:07403194:media:mrm26963:mrm26963-math-0004\"\/>\n                      and\n                      <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mrm26963-math-0005.png\" xlink:title=\"urn:x-wiley:07403194:media:mrm26963:mrm26963-math-0005\"\/>\n                      satisfy the echo time relation\n                      <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mrm26963-math-0006.png\" xlink:title=\"urn:x-wiley:07403194:media:mrm26963:mrm26963-math-0006\"\/>\n                      , where\n                      <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mrm26963-math-0007.png\" xlink:title=\"urn:x-wiley:07403194:media:mrm26963:mrm26963-math-0007\"\/>\n                      is an integer, making this a particularly fast and robust approach. Both developed methods constitute improvements over a prior method, MCPC\u20103D, in terms of robustness and computational expense.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      In the brain at 7 T, phase matching and contrast\u2010to\u2010noise ratio were higher with MCPC\u20103D\u2010S and ASPIRE than with phase difference reconstruction, and similar to the reference coil\u2013dependent Roemer combination. Unlike the Roemer and virtual reference coil methods, the proposed approaches also eliminated all non\u2013\n                      <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mrm26963-math-0008.png\" xlink:title=\"urn:x-wiley:07403194:media:mrm26963:mrm26963-math-0008\"\/>\n                      \u2010related phase.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>MCPC\u20103D\u2010S is an improvement over prior multi\u2010echo methods, which is useful if the ASPIRE echo time condition cannot be fulfilled. ASPIRE is a particularly fast and robust approach that runs on the scanner's reconstructor in a small fraction of the acquisition time. Magn Reson Med 79:2996\u20133006, 2018. \u00a9 2017 International Society for Magnetic Resonance in Medicine.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/mrm.26963","type":"journal-article","created":{"date-parts":[[2017,10,16]],"date-time":"2017-10-16T04:53:45Z","timestamp":1508129625000},"page":"2996-3006","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":111,"title":["Computationally Efficient Combination of Multi\u2010channel Phase Data From Multi\u2010echo Acquisitions (ASPIRE)"],"prefix":"10.1002","volume":"79","author":[{"given":"Korbinian","family":"Eckstein","sequence":"first","affiliation":[{"name":"High Field MR Centre, Department of Biomedical Imaging and Image\u2010Guided Therapy Medical University of Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Barbara","family":"Dymerska","sequence":"additional","affiliation":[{"name":"High Field MR Centre, Department of Biomedical Imaging and Image\u2010Guided Therapy Medical University of Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Beata","family":"Bachrata","sequence":"additional","affiliation":[{"name":"High Field MR Centre, Department of Biomedical Imaging and Image\u2010Guided Therapy Medical University of Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wolfgang","family":"Bogner","sequence":"additional","affiliation":[{"name":"High Field MR Centre, Department of Biomedical Imaging and Image\u2010Guided Therapy Medical University of Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karin","family":"Poljanc","sequence":"additional","affiliation":[{"name":"Atominstitut of the Austrian Universities Technical University of Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Siegfried","family":"Trattnig","sequence":"additional","affiliation":[{"name":"High Field MR Centre, Department of Biomedical Imaging and Image\u2010Guided Therapy Medical University of Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon Daniel","family":"Robinson","sequence":"additional","affiliation":[{"name":"High Field MR Centre, Department of Biomedical Imaging and Image\u2010Guided Therapy Medical University of Vienna Vienna Austria"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,10,16]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.20198"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.mri.2014.09.004"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.neuroimage.2010.11.088"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1522-2594(199911)42:5<952::AID-MRM16>3.0.CO;2-S"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.10171"},{"key":"e_1_2_7_7_1","unstructured":"SchweserF AtterburyM DeistungA LehrBW SommerK ReichenbachJR.Harmonic Phase Subtraction Methods Are Prone to B1 Background Components. 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