Sartoretti-Schefer S, Kollias S, Wichmann W, Valavanis A
Institute of Neuroradiology, University Hospital of Zürich, Switzerland.
Neuroradiology. 1999 Jan;41(1):46-51. doi: 10.1007/s002340050704.
The diagnostic value of 3D T2-weighted MRI sialography and 2D T2-weighted fast spin-echo (FSE) images for delineation of the normal duct system and characterisation of parotid gland duct pathology was compared in a prospective study. We studied eight healthy volunteers and 18 patients with pathology of the parotid gland (tumours in 3, sialolithiasis in 6, Sjögren's disease in 4, recurrent or chronic parotitis in 4, post-traumatic stricture of the main parotid duct in 1). A heavily T2-weighted 3D FSE sequence was compared with a conventional 2D T2-weighted FSE sequence. The normal main parotid duct was always visible on 3D sialography and seen in 68% of the 2D T2-weighted FSE studies. The diagnostic reliability of both sequences for diagnosis of luminal concretions in sialolithiasis and dilatation of the duct in duct stricture or chronic parotitis was equal, although slight intraglandular dilatation was appreciated only on 3D sialography. Extraductal pathology resulting in obstruction or displacement of ducts was better characterised on 2D T2-weighted images. However, 3D MRI sialography offered the advantage of postprocessing with overview images and multiple maximum-intensity projection images in any plane.
在一项前瞻性研究中，比较了三维T2加权磁共振涎管造影（3D T2-weighted MRI sialography）和二维T2加权快速自旋回波（FSE）图像对腮腺导管系统正常形态的描绘及腮腺导管病变特征的诊断价值。我们研究了8名健康志愿者和18例腮腺病变患者（3例肿瘤、6例涎石病、4例干燥综合征、4例复发性或慢性腮腺炎、1例腮腺主导管创伤后狭窄）。将重T2加权三维FSE序列与传统二维T2加权FSE序列进行比较。正常腮腺主导管在三维涎管造影中始终可见，在二维T2加权FSE检查中68%可见。对于涎石病中管腔内结石及导管狭窄或慢性腮腺炎中导管扩张的诊断，两种序列的诊断可靠性相同，不过仅在三维涎管造影中能观察到轻微的腺体内扩张。二维T2加权图像能更好地显示导致导管梗阻或移位的导管外病变特征。然而，三维磁共振涎管造影的优势在于可进行后处理，生成任意平面的概观图像和多个最大强度投影图像。
