Nishimura K, Fujisawa I, Togashi K, Itoh K, Nakano Y, Itoh H, Torizuka K
J Comput Assist Tomogr. 1986 Nov-Dec;10(6):899-902.
The posterior aspect of the normal sellar content usually displays high intensity signal on T1-weighted images. The shape, size, and location of this high intensity seem to be compatible with the posterior lobe of the pituitary gland. But fatty tissues such as intrasellar fat pad or fatty marrow of the dorsum sellae or both must be excluded as other possible sources of this high intensity signal. Two sellar phantoms were prepared. Both included high intensity posterior parts, one due to high concentration of a paramagnetic ion and the other due to fat. Magnetic resonance imaging of these phantoms showed that the fatty component was accompanied by distinct chemical shift artifacts in a predictable way. The absence of chemical shift artifact in the sellar content of normal volunteers excluded the fatty tissue as representing the high intensity posterior part. The high intensity posterior part of the normal sellar content appears to represent the posterior lobe of the pituitary gland.
正常鞍区内容物的后部在T1加权图像上通常显示为高信号强度。这种高信号的形状、大小和位置似乎与垂体后叶相符。但必须排除诸如鞍内脂肪垫或蝶鞍背的脂肪骨髓等脂肪组织，因为它们是这种高信号强度的其他可能来源。制备了两个鞍区模型。两者都包含高信号强度的后部，一个是由于顺磁性离子浓度高，另一个是由于脂肪。对这些模型进行磁共振成像显示，脂肪成分伴有可预测方式的明显化学位移伪影。正常志愿者鞍区内容物中不存在化学位移伪影，排除了脂肪组织代表高信号强度后部的可能性。正常鞍区内容物的高信号强度后部似乎代表垂体后叶。
