FEMALE URETHRA - MR IMAGING
FEMALE URETHRA - MR IMAGING
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DOI：
10.1148/radiology.178.2.1898991
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发表时间：
1991-02-01
期刊：
影响因子：
19.7
通讯作者：
MCANINCH, JW
中科院分区：
文献类型：
--
作者：
HRICAK, H;SECAF, E;MCANINCH, JW
对64例女性尿道进行了磁共振（MR）成像评价。 所有64例患者均获得了自旋回波T1和T2加权图像，27例患者还获得了对比增强T1加权图像。 经尿道镜检查或组织学检查或两者结合确定的尿道病理状况包括尿道憩室、炎性肉芽肿以及原发性和转移性肿瘤。 在T2加权像上，所有正常乳腺表现出特征性的靶样外观，在低信号强度的外环，高信号强度的中间区域和低信号强度的中心之间存在差异。 注射钆喷酸葡胺后，正常尿道在T1加权像上呈靶样表现。 在所有9例诊断为尿道憩室的患者中，均通过MR成像检测到尿道憩室，并且在每例患者中，MR成像均显示尿道扩张、带状解剖结构扭曲以及中间区域存在液体。 原发性或转移性尿道肿瘤也发现与MR成像在每一个诊断的患者，但良性和恶性疾病之间的区分是不可能的。 11例患者中有8例的原发性或转移性恶性肿瘤的局部分期是正确的。 在3例患者中，炎症变化无法与肿瘤浸润相区分，导致高估了肿瘤范围。
The potential of magnetic resonance (MR) imaging in the evaluation of the female urethra was studied in 64 patients. Spin-echo T1- and T2-weighted images were obtained in all 64 patients, and contrast-enhanced T1-weighted images were also obtained in 27 patients. Urethral pathologic conditions, established with urethroscopy or histologic examination, or both, included urethral diverticula, inflammatory granuloma, and primary and metastatic neoplasms. On T2-weighted images, all normal urethras demonstrated a characteristic targetlike appearance with differentiation among the outer ring of low signal intensity, the middle zone of higher signal intensity, and the center of low signal intensity. After injection of gadopentetate dimeglumine, the targetlike appearance of the normal urethra was seen on the T1-weighted images. Urethral diverticula were detected with MR imaging in all nine patients with that diagnosis, and in each, MR imaging demonstrated urethral expansion, distortion of the zonal anatomy, and presence of fluid in the middle zone. Primary or metastatic urethral neoplasms were also detected with MR imaging in every patient with the diagnosis, but differentiation between benign and malignant disease was not possible. Local staging of primary or metastatic malignant disease was correct in eight of the 11 patients. In three patients, the inflammatory changes could not be differentiated from tumor invasion, resulting in overestimation of tumor extent.