18 channel body matrix coil

MR scanning was performed at the MR Centre at Aarhus University Hospital using a 3-T Siemens Skyra Magnetom (Siemens AG, Erlangen, Germany). The scan protocol consisted of a T1-weighted, 3-point gradient echo Dixon sequence (400 slices of three mm thickness, 20% gap, TR 5.31 ms, TE 2.46 ms, flip angle 9°, FOV 500, in-plane resolution 1 x 1 mm) acquiring images in a total scan time of 40 min. Participants were lying in a feet-first supine position and MR images were recorded from the ankle (lateral malleolus) to the trochanter major with the use of a 36 channel peripheral angio coil (Siemens AG, Erlangen, Germany) and from the trochanter major to L1 with a 18 channel body matrix coil (Siemens AG, Erlangen, Germany).

A 12-lead electrocardiogram was conducted prior to MRI. Imaging occurred on non-dialysis days with a 1.5 T Siemens Aera scanner (Erlangen, Germany) using an 18-channel body matrix coil and 12-channel spine coil. MT-weighted CMR was completed as previously described^{12 (link)}. During separate end expiratory breath holds, cine bSSFP image pairs were obtained using excitation flip angles of 5° and 45° in a short axis stack from LV base to apex. Parameters included TE: 1.2 ms, TR: 3.2 ms, bandwidth: 930 Hz, matrix: 256 × 256, in-plane resolution: 1.02 × 1.02 mm, slice thickness: 8 mm, and GRAPPA 2.