Detection and Evaluation of Pelvic Lymph Nodes in Patients With Gynecologic Malignancies Using Body Diffusion-Weighted Magnetic Resonance Imaging
Detection and Evaluation of Pelvic Lymph Nodes in Patients With Gynecologic Malignancies Using Body Diffusion-Weighted Magnetic Resonance Imaging
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DOI：
10.1097/rct.0b013e318153fd43
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发表时间：
2008-09-01
影响因子：
1.3
通讯作者：
Yamada, Takashi
中科院分区：
文献类型：
--
作者：
Nakai, Go;Matsuki, Mitsuru;Yamada, Takashi
背景：本研究旨在探讨体扩散加权成像(DW)对妇科恶性肿瘤患者盆腔淋巴结转移的诊断价值。方法：对18例妇科恶性肿瘤患者采用1.5T超导磁体进行盆腔磁共振成像。仅在T2加权(T2W)轴位图像上识别骨盆结节，在DW轴位图像上除T2W外还识别骨盆结节。对轴位图像进行检查和比较。测量并计算T2W图像上结节的短轴直径、长轴直径、长短轴直径之比和DW图像上结节的表观扩散系数(ADC)值。结果：340个解剖结节在T2W图像上检出136个(40%)，在T2W图像上检出249个(73%)。转移性结节与非转移性结节在T2W图像上的短轴直径、长轴直径及长短轴直径比值差异无统计学意义。结论：体部DW图像对妇科恶性肿瘤患者盆腔淋巴结的检出有一定价值，但ADC值的测量无助于转移淋巴结的诊断。
Background: In this study, the potential in detecting and evaluating pelvic lymph node metastases on body diffusion-weighted (DW) images was evaluated in patients with gynecologic malignancies.Methods: This study, included 18 patients with gynecologic malignancy who underwent magnetic resonance imaging in the pelvis using a 1.5-T superconductive magnet. The identification of pelvic nodes on only T2-weighted (T2W) axial images and on DW axial images in addition to T2W. axial images was examined and compared. Moreover, we measured and calculated a short-axis diameter, a long-axis diameter, and a ratio of short- and long-axis diameter of nodes on the T2W images and the apparent diffusion coefficient (ADC) values of the nodes on the DW images. These results were compared with histopathologic results.Results: First, 136 (40%) of 340 dissected nodes were identified on T2W images, and 249 (73%) of 340 dissected nodes were identified oil DW images in addition to T2W images. Second, the differences in the short-axis diameter, the long-axis diameter, and the ratio of short- and long-axis diameter on T2W images between metastatic and nonmetastatic nodes were not significant. The differences in the ADC values between metastatic and nonmetastatic nodes were not significant.Conclusions: Body DW images are useful in detection of pelvic lymph nodes in patients with gynecologic malignancy However, the measurement of ADC values does not contribute to a diagnosis of metastatic nodes.