{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T16:12:51Z","timestamp":1761581571005,"version":"3.41.0"},"reference-count":46,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2017,6,22]],"date-time":"2017-06-22T00:00:00Z","timestamp":1498089600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Magnetic Resonance in Med"],"published-print":{"date-parts":[[2018,3]]},"abstract":"<jats:sec><jats:title>Purpose<\/jats:title><jats:p>We present the initial in vivo imaging results of an open architecture eight\u2010channel parallel transmission (pTx) transceive radiofrequency (RF) coil array that was designed and constructed for static and dynamic 7T MRI of the knee and ankle joints.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The pTx coil has a U\u2010shaped dual\u2010row configuration (200\u2009mm overall length longitudinally) that allows static and dynamic imaging of the knee and ankle joints at various postures and during active movements. This coil structure, in combination with B<jats:sub>1<\/jats:sub>shimming, allows flexible configuration of B<jats:sub>1<\/jats:sub>transmit profiles, with good homogeneity over 120\u2010mm regions of interest. This coil enabled high\u2010resolution gradient echo (e.g., 3D dual\u2010echo steady state [DESS] and 3D multiecho data image combination [MEDIC]) and turbo spin echo (TSE) imaging (e.g., with proton density weighting [PDw], PDw with fat saturation, and T<jats:sub>1<\/jats:sub>and T<jats:sub>2<\/jats:sub>weightings) with local RF energy absorption rates well below regulatory limits.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>High\u2010resolution 2D and 3D image series (e.g., 0.3\u2009mm in\u2010plane resolution for TSE, 0.47\u2009mm isotropic for DESS and MEDIC) were obtained from the knee and ankle joints with excellent tissue contrast. Dynamic imaging during continuous knee and ankle flexion\u2010extension cycles were successfully acquired.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The new open pTx coil array provides versatility for high\u2010quality static and dynamic MRI of the knee and ankle joints at 7T. 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