Abstract
From a practical point of view, the imagings of head and neck tumor with both magnetic resonance imaging (MRI) and X-ray CT were examined in the same cases. Four cases were selected for this study. They were a brachiogenic carcinoma and a carotid body tumor of the neck, an inverted papilloma in the maxillary sinus and a malignant lymphoma of the nasopharynx. Five points for diagnosis such as, 1) conspicuousness, 2) interal structure, 3) regional extent, 4) marginal figure of a tumor and 5) relationship to vessels were inspected.
The result indicated that MRI is the imaging modality of choice for investigation of the conspicuosness, regional extent of a lesion and the relationship to vessels and superior to those from CT but CT is superior to MRI in order to determine the marginal edge and its internal structure, especially in the case with cystic tumor.
