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The modified USPC used a 12\u2010interleaf spiral trajectory to acquire full\u2010image data every 283 ms with 2\u2010mm spatial resolution. The total scan time was 5 s. For comparison, a triggered real\u2010time (TRT) method was used to indirectly calculate CO by measuring left\u2010ventricular (LV) volume. The USPC and TRT measurements from all normal volunteers agreed. In a patient with patent ductus arteriosus (PDA), high CO was measured with USPC, which agreed well with the invasive cardiac\u2010catheterized measurement. In normal volunteers, CO dropped about 20\u201330% with Valsalva maneuvering, and increased about 100% after exercise. Continuous 28\u2010s cycling between Valsalva maneuvering and free\u2010breathing showed that USPC can temporally resolve physiological CO changes. Magn Reson Med, 2006. \u00a9 2006 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/mrm.20970","type":"journal-article","created":{"date-parts":[[2006,6,26]],"date-time":"2006-06-26T18:05:45Z","timestamp":1151345145000},"page":"432-438","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Rapid cardiac\u2010output measurement with ungated spiral phase contrast"],"prefix":"10.1002","volume":"56","author":[{"given":"Jong B.","family":"Park","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bob S.","family":"Hu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Steven M.","family":"Conolly","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Krishna S.","family":"Nayak","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dwight G.","family":"Nishimura","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,6,26]]},"reference":[{"key":"e_1_2_6_2_2","first-page":"1943","volume-title":"Heart disease: a textbook of cardiovascular medicine","author":"Braunwald E","year":"1980"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.10369"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.20325"},{"key":"e_1_2_6_5_2","first-page":"329","volume-title":"Duplex scanning in vascular disorders","author":"Strandness DE","year":"1993"},{"key":"e_1_2_6_6_2","first-page":"125","article-title":"Quantitative magnetic resonance flow imaging","volume":"10","author":"Pelc NJ","year":"1994","journal-title":"Magn Reson Q"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.20358"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.10341"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/TMI.1986.4307732"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910380303"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910330203"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1522-2594(199903)41:3<520::AID-MRM14>3.0.CO;2-A"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(86)90837-8"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.1880050202"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910390218"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1522-2594(199901)41:1<103::AID-MRM15>3.0.CO;2-M"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.1880040520"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1002\/mrm.1910300113"},{"key":"e_1_2_6_19_2","doi-asserted-by":"publisher","DOI":"10.1148\/radiol.2292020559"},{"key":"e_1_2_6_20_2","doi-asserted-by":"publisher","DOI":"10.1161\/01.CIR.0000126494.66859.A2"},{"key":"e_1_2_6_21_2","doi-asserted-by":"publisher","DOI":"10.1002\/jmri.10231"}],"container-title":["Magnetic Resonance in Medicine"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fmrm.20970","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/mrm.20970","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,9]],"date-time":"2023-10-09T19:23:44Z","timestamp":1696879424000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/mrm.20970"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2006,6,26]]},"references-count":20,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2006,8]]}},"alternative-id":["10.1002\/mrm.20970"],"URL":"https:\/\/doi.org\/10.1002\/mrm.20970","archive":["Portico"],"relation":{},"ISSN":["0740-3194","1522-2594"],"issn-type":[{"value":"0740-3194","type":"print"},{"value":"1522-2594","type":"electronic"}],"subject":[],"published":{"date-parts":[[2006,6,26]]},"assertion":[{"value":"2005-08-18","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2006-04-25","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2006-06-26","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}