{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T14:22:12Z","timestamp":1770906132996,"version":"3.50.1"},"reference-count":22,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2011,2,3]],"date-time":"2011-02-03T00:00:00Z","timestamp":1296691200000},"content-version":"vor","delay-in-days":5452,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"National Center for Research Resources at the National Institutes of Health","award":["RR08079"],"award-info":[{"award-number":["RR08079"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Magnetic Resonance in Med"],"published-print":{"date-parts":[[1996,3]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>A physiological artifact reduction method based on extracting respiratory motion and cardiac pulsation directly from functional MR data is described. In fast low angle shot (FLASH), respiratory cycles are derived utilizing the phase of the center of a navigator echo, in echo\u2010planar imaging (EPI) from the phase of the center \u03ba\u2010space point. Cardiac cycles are determined from projections obtained from the navigator echo (FLASH) and the center \u03ba\u2010space line (EPI). Because direct extraction of physiological parameters eliminates the need for external monitoring, the method can be more readily implemented. Experimental results illustrate that the technique provides effective compensation for physiology\u2010related signal fluctuations in functional MRI and performs as well as the retrospective technique using external physiological monitoring. Key words: fMRI; motion artifacts; physiological motion; image processing.<\/jats:p>","DOI":"10.1002\/mrm.1910350305","type":"journal-article","created":{"date-parts":[[2011,2,3]],"date-time":"2011-02-03T14:18:32Z","timestamp":1296742712000},"page":"290-298","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":115,"title":["Retrospective estimation and correction of physiological artifacts in fMRI by direct extraction of physiological activity from MR data"],"prefix":"10.1002","volume":"35","author":[{"given":"Tuong Huu","family":"Le","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoping","family":"Hu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2011,2,3]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1948051"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910250220"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1097\/00001756-199306000-00018"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1152\/jn.1993.69.1.297"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.89.12.5675"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.89.13.5951"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910340211"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910030617"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/0730-725X(90)90001-I"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910130105"},{"key":"e_1_2_1_12_2","unstructured":"T. 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