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An 8\u2010channel Rx coil array consisting of a flexible 6\u2010channel posterior and a 2\u2010channel planar anterior array was designed to fit on the abdomen of an average\u2010sized pig in supine position. Measurements were performed in a grid phantom and ex vivo on a pig model with perfluoroctylbromide (PFOB)\u2013filled tubes inserted in the thorax.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Measured and simulated Tx efficiency and homogeneity for the 8\u2010channel and 5\u2010channel arrays were in good agreement: 1.87\u2009\u00b1\u20090.22\u03bcT\/\u221akW versus 1.96\u2009\u00b1\u20090.29\u03bcT\/\u221akW, and 2.29\u2009\u00b1\u20090.39\u03bcT\/\u221akW versus 2.41\u2009\u00b1\u20090.37\u03bcT\/\u221akW. An isolation of 38\u2009\u00b1\u20098\u00a0dB is achieved between the <jats:sup>19<\/jats:sup>F Tx and Rx elements, and over 30\u00a0dB between the <jats:sup>1<\/jats:sup>H and <jats:sup>19<\/jats:sup>F elements. The PFOB\u2010filled vials could be clearly identified within the cadaver abdomen with an SNR of 275\u2009\u00b1\u200951 for a 3D gradient\u2010echo sequence with 2\u2010mm isotropic resolution and 12 averages, acquired in 9:52\u2009min:s. Performance of the Tx array was robust against phase and amplitude mismatches at the input ports.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>A modular and scalable Tx array offers improved Tx efficiency in <jats:sup>19<\/jats:sup>F MRI of large animals with various sizes. Although conventional birdcage coils have superior Tx efficiency within the target region of interest, scalability of the Tx array to animal size is a major benefit. The described <jats:sup>19<\/jats:sup>F coil provides homogeneous excitation and high sensitivity detection in large pig models.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mrm.29490","type":"journal-article","created":{"date-parts":[[2022,10,13]],"date-time":"2022-10-13T09:39:06Z","timestamp":1665653946000},"page":"1237-1250","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Scalable and modular <scp>8\u2010channel<\/scp> transmit and <scp>8\u2010channel<\/scp> flexible receive coil array for <scp><sup>19<\/sup>F MRI<\/scp> of large animals"],"prefix":"10.1002","volume":"89","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3536-0826","authenticated-orcid":false,"given":"Ali Caglar","family":"\u00d6zen","sequence":"first","affiliation":[{"name":"Department of Radiology, Medical Physics, Medical Center\u2013University of Freiburg University of Freiburg   Freiburg 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