Evaluation of high resolution MR imaging of the pelvis using a endorectal coil

我们使用直肠内线圈结合相控阵线圈获得并评估了前列腺癌、宫颈癌和直肠癌的MR图像。同时使用直肠内线圈显著改善了信噪比。与仅相控阵线圈相比，该线圈组合更准确地显示了小病变和肿瘤浸润（T分期）。T2加权成像对前列腺癌的检出和囊外浸润的评估有重要价值。动态观察有助于宫颈癌的检出及T分期。直肠癌T2加权像可用于评价直肠壁分层和T分期。T2加权像结合动态检查可提高诊断准确性。直肠内线圈还提高了对肿瘤累及盆腔其他器官的诊断准确性。直肠内线圈也可用于评价膀胱肿瘤和直肠附近的下尿路肿瘤。目前直肠内弹簧圈有点太大，导致患者不适。我们需要改进直肠内弹簧圈的尺寸和形状。我们希望累积更多的病例，并评估直肠内弹簧圈的有用性。

We obtained and evaluated MR images of prostate cancer, uterine cervical cancer, and rectal cancer using a endorectal coil combined with phased array coils. Concominant use of endorectal coil improved signal to noise ratio significantly. Small lesions and tumor invasion (T-staging) were more accurately demonstrated by this coil combination compared with phased array coils only. T2-weighted images were useful in detection of prostate cancer and evaluation of its extracapsular invasion. Dynamic study was useful in detection of uterine cervical cancer and its T-staging. On rectal cancer, T2-weighted images were useful to evaluate of the rectal wall layer and T-staging. T2-weighted images and dynamic study together improved the diagnostic accuracy. Endorectal coil also improved diagnostic accuracy of tumor inavasion to other pelvic organs. Endorectal coil may also be useful to evaluate bladder tumor and lower uretheral tumors near the rectum. Endorectal coils are a little too large at the moment and cause patients discomforts. We need to improve the size and shape of endorectal coil. We would like to accumulate more cases and evaluate the usefulness of endorectal coil.