{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T13:12:15Z","timestamp":1762521135436,"version":"3.41.2"},"reference-count":21,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2007,1,16]],"date-time":"2007-01-16T00:00:00Z","timestamp":1168905600000},"content-version":"vor","delay-in-days":380,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["5R21CA114680","P41 RR005959\/R24 CA092656"],"award-info":[{"award-number":["5R21CA114680","P41 RR005959\/R24 CA092656"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000097","name":"National Center for Research Resources","doi-asserted-by":"publisher","award":["5R21CA114680","P41 RR005959\/R24 CA092656"],"award-info":[{"award-number":["5R21CA114680","P41 RR005959\/R24 CA092656"]}],"id":[{"id":"10.13039\/100000097","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["International Journal of Biomedical Imaging"],"published-print":{"date-parts":[[2006,1]]},"abstract":"<jats:p>Non\u2010Cartesian sampling is widely used for fast magnetic resonance imaging (MRI). Accurate and fast image reconstruction from non\u2010Cartesian<jats:italic>k<\/jats:italic>\u2010space data becomes a challenge and gains a lot of attention. Images provided by conventional direct reconstruction methods usually bear ringing, streaking, and other leakage artifacts caused by discontinuous structures. In this paper, we tackle these problems by analyzing the principal point spread function (PSF) of non\u2010Cartesian reconstruction and propose a leakage reduction reconstruction scheme based on discontinuity subtraction. Data fidelity in<jats:italic>k<\/jats:italic>\u2010space is enforced during each iteration. Multidimensional nonuniform fast Fourier transform (NUFFT) algorithms are utilized to simulate the<jats:italic>k<\/jats:italic>\u2010space samples as well as to reconstruct images. The proposed method is compared to the direct reconstruction method on computer\u2010simulated phantoms and physical scans. Non\u2010Cartesian sampling trajectories including 2D spiral, 2D and 3D radial trajectories are studied. The proposed method is found useful on reducing artifacts due to high image discontinuities. It also improves the quality of images reconstructed from undersampled data.<\/jats:p>","DOI":"10.1155\/ijbi\/2006\/87092","type":"journal-article","created":{"date-parts":[[2007,3,5]],"date-time":"2007-03-05T12:55:22Z","timestamp":1173099322000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Improving Non\u2010Cartesian MRI Reconstruction through Discontinuity Subtraction"],"prefix":"10.1155","volume":"2006","author":[{"given":"Jiayu","family":"Song","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qing Huo","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2007,1,16]]},"reference":[{"key":"e_1_2_1_1_2","doi-asserted-by":"publisher","DOI":"10.1109\/42.97598"},{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMI.1985.4307723"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1137\/0914081"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1006\/acha.1995.1026"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/75.650975"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1137\/S1064827597325712"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/TSP.2002.807005"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/S1090-7807(03)00107-1"},{"key":"e_1_2_1_9_2","unstructured":"SongJ. 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Point spread function optimization for MRI reconstruction 2 477\u2013480 https:\/\/doi.org\/10.1109\/ICASSP.2005.1415445.","DOI":"10.1109\/ICASSP.2005.1415445"},{"key":"e_1_2_1_18_2","doi-asserted-by":"publisher","DOI":"10.1109\/42.845180"},{"key":"e_1_2_1_19_2","doi-asserted-by":"publisher","DOI":"10.1190\/1.1993713"},{"key":"e_1_2_1_20_2","doi-asserted-by":"publisher","DOI":"10.1109\/TIT.2005.862083"},{"key":"e_1_2_1_21_2","doi-asserted-by":"crossref","unstructured":"Cand\u00e8sE. J.andRombergJ. Practical signal recovery from random projections preprint 2004.","DOI":"10.1117\/12.600722"}],"container-title":["International Journal of Biomedical Imaging"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/ijbi\/2006\/087092.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1155\/IJBI\/2006\/87092","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,1,14]],"date-time":"2025-01-14T16:02:16Z","timestamp":1736870536000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1155\/IJBI\/2006\/87092"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2006,1]]},"references-count":21,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2006,1]]}},"alternative-id":["10.1155\/IJBI\/2006\/87092"],"URL":"https:\/\/doi.org\/10.1155\/ijbi\/2006\/87092","archive":["Portico"],"relation":{},"ISSN":["1687-4188","1687-4196"],"issn-type":[{"type":"print","value":"1687-4188"},{"type":"electronic","value":"1687-4196"}],"subject":[],"published":{"date-parts":[[2006,1]]},"assertion":[{"value":"2007-01-16","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"087092"}}