Prostate MR imaging at 3T with a longitudinal array endorectal surface coil and phased array body coil

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Abstract

Purpose

To demonstrate the feasibility of using a double loop phased array endorectal coil combined with a phased array body coil to image the prostate at 3T.

Materials and Methods

We designed and constructed a novel prostate coil employing two arrayed 4.0 × 5.0 cm loops, tuned the device for optimal performance at 3T, and characterized the signal-to-noise ratio (SNR) associated with it.

Results

The coil Q factor was calculated to be ≈50 unloaded, and 30 when loaded on human tissue. SNR maps at multiple orientations were constructed and images were acquired on both a phantom and a human. As expected, SNR was highest along the midpoint of the array and demonstrated strong signal even at 4 cm from the coil.

Conclusion

The double loop phased array endorectal coil combined with a phased array body coil at 3T is feasible in vivo and compelling enough to warrant future clinical trials to evaluate its efficacy. These trials are currently under way. J. Magn. Reson. Imaging 2008;27:1327–1330. © 2008 Wiley-Liss, Inc.

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