Cornud F, Belin X, Melki P, Hélénon O, Crétien Y, Dufour B, Moreau J F
Service de Radiologie, Hôpital Necker, Paris.
J Radiol. 1995 Jan;76(1):11-20.
The development of an endorectal surface coil now permits a partial study of the anatomical model developed by McNeal. Axial and coronal views, which were used to establish the model can be obtained in a short period of time with fast spin echo sequences. Axial views are performed along the proximal urethra and coronal views are performed along the axis of the distal urethra and the ejaculatory ducts. Anatomical boundaries of the transitional zone are well delineated on axial views, illustrating the concept of "inner gland". The prostatic capsule and the neuro-vascular bundles, pathways of extension of the cancer out of the prostate are also well delineated. Coronal sections allow a very good anatomical study of the caudal junction of the vas deferens and the seminal vesicles (the so called weak space), pathway of tumor extension to the seminal vesicles. Differences in signal of the prostatic zones make the outer gland cancers very conspicuous as well as some transitional cancers which can show, in some cases, an homogeneous hyposignal.
直肠内表面线圈的发展现在使得对麦克尼尔所建立的解剖模型进行部分研究成为可能。用于建立该模型的轴位和冠状位视图可通过快速自旋回波序列在短时间内获得。轴位视图沿近端尿道进行，冠状位视图沿远端尿道和射精管的轴线进行。移行区的解剖边界在轴位视图上清晰可辨，说明了“内腺”的概念。前列腺包膜和神经血管束，即癌症从前列腺向外扩展的途径也清晰可辨。冠状位切片能很好地对输精管和精囊的尾端交界处（即所谓的薄弱间隙）进行解剖学研究，这是肿瘤向精囊扩展的途径。前列腺各区域信号的差异使得外腺区癌以及一些移行区癌非常明显，在某些情况下，一些移行区癌可显示均匀的低信号。
