Dielectric resonator antennas (DRAs) are simple to construct elements which can be used in the design of MRI transmit arrays. Previous implementations of DRAs in MRI have utilized the TE₀₁ mode of large and relatively heavy cylindrical dielectric resonators with a relative permittivity of ~170¹. By using materials with much higher permittivity, not only can the DRA be made much thinner and lighter, but also more of the magnetic field can be coupled into the body. Since the electric field is mostly contained within the resonator and the magnetic field of the TE₀₁ mode emanates normal to the major surface of the resonator there is consequently very little coupling between adjacently placed DRAs. In this work we design transmit arrays for body and extremity imaging at 7 Tesla.The DRAs were constructed from 5 mm thick Lead Zirconate Titanate (PZT) (TRS Technologies, State College, PA, USA) with a relative permittivity of ~1070. Simulations (CST Microwave Studio, Darmstadt, Germany) were used to determine the exact size of each rectangular element such that the frequency of the TE01 mode was at 298.1 MHz when loaded with a tissue-equivalent phantom. The length and width of the DRAs were determined to be 90 mm and 44 mm respectively (Figure 2). Each DRA weighed 185 grams. B₁⁺ and SAR values were also determined in these simulations. The RF signal is coupled into the DRA using a small (inner diameter 11 mm, outer diameter 15 mm), critically-coupled resonant loop with a balanced matching network positioned 15 mm above the face of the DRA (Figure 2). Tuning and impedance matching was performed for each element placed on a saline phantom (70 mmol NaCl). An eight-element circular transmit/receive array was constructed with the DRAs spaced 5 mm apart. Images were obtained using a Phillips 7T MRI system (Philips Achieva, Philips Healthcare, Best, the Netherlands) with eight 2 kW amplifiers. The driving signals for each element to produce a homogeneous transmit field were determined using a phase optimization program.The S₁₁ measurement for each of the eight individual elements, loaded with the saline phantom, was lower than -20 dB at 298.1 MHz. Coupling between adjacent antennas spaced 5 mm apart was less than -17 dB, and less than -19 dB when placed on the thigh. Turbo spin echo images were obtained from the right knee of a healthy volunteer (Figure 3). A B₁ magnitude of 24 μT was achieved at the center of the knee using a transmit power for each element of 435 W. The dark spot visible in the femur is a SENSE reconstruction artifact that stems from destructive interference in the reference scan. Simulation results shown in Figure 4 give a B₁^+/√SARmax of 10 μT(W/kg)^-0.5 at a distance of 7.5 mm below the center of the resonator and 1 μT(W/kg)^-0.5 at 23.5 mm.DRAs are a simple-to-construct design for use in modular transmit arrays for imaging in ultra high-field MRI. The very low coupling seen between closely spaced DRAs allows them to be implemented in any array configuration without the need for additional decoupling.