Zinreich S J, Kennedy D W, Kumar A J, Rosenbaum A E, Arrington J A, Johns M E
Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD.
J Comput Assist Tomogr. 1988 Nov-Dec;12(6):1014-9. doi: 10.1097/00004728-198811000-00019.
Sequential MR examinations of the nasal cavity and paranasal sinuses were performed within a 6-8 h period in five normal volunteers. The nasal mucosal volume and signal intensities (T2 weighted) were shown to alternate from one side to the other during this period. When a topical vasoconstrictor was applied, this cycle was interrupted. These cyclical changes were limited to the mucosa of the turbinates, nasal cavity, and ethmoid sinus, representative of the nasal cycle. The maxillary, frontal, and sphenoid sinuses were not affected. The hyperintensity of the nasal cycle on T2-weighted images was similar to that shown by inflammatory mucosa. Squamous cell carcinoma within the nasal cavity and paranasal sinuses has characteristically demonstrated a lower signal intensity on T2-weighted images. Awareness of these cyclical nasal and paranasal appearances reduces the likelihood of inflammatory disease being confused with normal physiologic changes within the nasal area.
在6至8小时内，对五名正常志愿者的鼻腔和鼻窦进行了连续的磁共振成像（MR）检查。在此期间，鼻腔黏膜体积和信号强度（T2加权）显示出从一侧到另一侧交替变化。当使用局部血管收缩剂时，这种循环被中断。这些周期性变化仅限于鼻甲、鼻腔和筛窦的黏膜，这是鼻周期的典型表现。上颌窦、额窦和蝶窦未受影响。鼻周期在T2加权图像上的高信号强度与炎性黏膜相似。鼻腔和鼻窦内的鳞状细胞癌在T2加权图像上通常表现为较低的信号强度。了解这些鼻腔和鼻窦的周期性表现可降低炎性疾病与鼻腔区域正常生理变化相混淆的可能性。
