FIGURE 1.

Preliminary 4T-gated cardiac images were acquired with the TEM body coil transmitter and phased-array receivers. An artifact in the right atrium common to 4T heart images (A) is corrected by RF shimming (B). Images were acquired with a 4-channel, phased-array receiver using an EKG gated gradient-echo sequence (TE 4.3 ms, slice 5 mm, FOV 40 30 cm², matrix 256 128). An 8-kW RF power amplifier was used to drive the transmit coil. No intensity correction was applied to these 4-loop, phased-array images. Republished with permission of John Wiley and Sons from “Efficient high-frequency body coil for high-field MRI,” Vaughan JT, Adriany G, Snyder CJ, et al. 2004;52(4): 851-859.