Masciocchi C, Fascetti E, Cutilli T, Gallucci M, Trecco F, Corbacelli A, Passariello R
Cattedra di Radiologia, Università, USSL, L'Aquila.
Radiol Med. 1988 Jun;75(6):626-31.
MRI findings in 13 patients with monolateral parotid tumor were compared with US, sialographic and CT findings. MRI did not allow an accurate diagnosis in 2 patients with diffuse chronic parotitis. MRI was superior to CT in 1 case in defining the intraglandular site of the lesion, and in 2 patients in showing the extraglandular involvement. MRI proved to be superior to CT thanks to its contrast resolution and to multiplanar imaging. MRI high contrast resolution made it possible to demonstrate neoplastic lesions of 4 mm in diameter. The lesion has low signal intensity on T1-weighted images and high signal intensity on T2-weighted. Parotid tumors cannot be characterized by signal intensity alone: only morphology allows to discriminate between benign and malignant lesions. To conclude, US is a screening method, while MRI is helpful in detecting multifocal lesions and in evaluating the tumor extent.
对13例单侧腮腺肿瘤患者的MRI表现与超声、涎管造影及CT表现进行了比较。2例弥漫性慢性腮腺炎患者的MRI未能做出准确诊断。在确定病变的腺内位置方面，MRI在1例患者中优于CT，在显示腺外受累方面，MRI在2例患者中优于CT。由于其对比分辨率和多平面成像，MRI被证明优于CT。MRI的高对比分辨率使得直径4mm的肿瘤性病变得以显示。该病变在T1加权图像上呈低信号强度，在T2加权图像上呈高信号强度。腮腺肿瘤不能仅通过信号强度来特征化：只有形态学才能区分良性和恶性病变。总之，超声是一种筛查方法，而MRI有助于检测多灶性病变并评估肿瘤范围。
