MR of intraparotid masses.
MR of intraparotid masses.
复制标题
腮腺内肿块的 MR。
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
D. Yousem
中科院分区：
文献类型：
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作者：
B. Schlakman;D. Yousem
目的
目的：确定哪些MR技术最适合于腮腺内肿块的诊断，并评估MR在预测特定诊断中的作用。
方法
对31例腮腺内肿块进行了回顾性分析。通过客观测量感兴趣区域和主观视觉回顾来评估病变的显着性和信号强度特征。
结果
在31个肿块中，有25个在T1加权像上显示出最高的病变。所有肿块在T1加权像上均为低信号，清晰度良好或极佳；在T2加权像上，9个病灶与正常腮腺组织等信号，包括6个恶性肿瘤。Gd增强扫描对腮腺内肿块的识别没有帮助。肿瘤和恶性肿瘤在T2加权像上呈低信号或低信号。
结论
T1加权像对腮腺肿块的显示效果最好。T2加权图像可能有助于限制鉴别诊断，但没有活检就不能做出具体诊断。
PURPOSE
To determine which MR techniques are best for identifying intraparotid masses and to assess the utility of MR for predicting specific diagnosis.
METHODS
A retrospective review of 31 intraparotid masses was performed. Lesion conspicuity and signal intensity characteristics were evaluated by objectively measured regions of interest and by subjective visual review.
RESULTS
The T1-weighted images produced the highest lesion conspicuity in 25 of 31 masses. All the masses were easily detected as hypointense lesions on the T1-weighted scans with good or excellent conspicuity; on the T2-weighted images nine lesions appeared isointense to the normal parotid tissue, including six malignancies. Gadolinium-enhanced images were not helpful for identifying the intraparotid masses. Warthin tumors and malignancies tended to be hypointense or low in conspicuity on T2-weighted images.
CONCLUSIONS
The T1-weighted images were best for detecting parotid masses. The T2-weighted images may help in limiting a differential diagnosis, but a specific diagnosis cannot be made without biopsy.