Kim David Y, Schnall Mitchell D, Rosen Mark A, Connick Thomas
Department of Radiology, Weill Cornell Medical College, New York, New York, USA.
J Magn Reson Imaging. 2008 Jun;27(6):1327-30. doi: 10.1002/jmri.21389.
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.
We designed and constructed a novel prostate coil employing two arrayed 4.0 x 5.0 cm loops, tuned the device for optimal performance at 3T, and characterized the signal-to-noise ratio (SNR) associated with it.
The coil Q factor was calculated to be approximately 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.
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.
证明在3T场强下使用双环相控阵直肠内线圈联合相控阵体部线圈对前列腺成像的可行性。
我们设计并构建了一种新型前列腺线圈，采用两个4.0×5.0 cm的阵列环，对该设备进行调谐以使其在3T场强下达到最佳性能，并对与之相关的信噪比（SNR）进行表征。
计算得出该线圈的空载品质因数约为50，加载到人体组织上时为30。构建了多个方向的SNR图，并在体模和人体上采集了图像。正如预期的那样，SNR在阵列中点处最高，即使在距线圈4 cm处也显示出强信号。
在3T场强下，双环相控阵直肠内线圈联合相控阵体部线圈在体内是可行的，并且具有足够的吸引力，值得开展未来的临床试验以评估其疗效。目前这些试验正在进行中。
