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首页> 外文期刊>Radiology >Half-Fourier, three-dimensional technique for dynamic contrast-enhanced MR imaging of both breasts and axillae: initial characterization of breast lesions.
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Half-Fourier, three-dimensional technique for dynamic contrast-enhanced MR imaging of both breasts and axillae: initial characterization of breast lesions.

机译：半傅立叶三维技术对乳房和腋窝进行动态对比增强MR成像：乳房病变的初步特征。

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PURPOSE: To evaluate the ability of asymmetric half-Fourier three-dimensional (3D) magnetic resonance (MR) imaging to characterize signal intensity changes in breasts and axillae after contrast material injection and to compare the spatial resolution and measured signal intensity change of asymmetric and symmetric (keyhole) partial Fourier techniques. MATERIALS AND METHODS: Imaging was performed in 28 adult patients by collecting a single full-Fourier 3D data set with bolus injection of contrast material during the last 10 seconds followed by collection of six half-Fourier 3D data sets without interimage delays. Postcontrast keyhole and half-Fourier images were formed from the same full-Fourier raw data set. RESULTS: The asymmetric half-Fourier 3D technique maintained the spatial resolution and lesion signal intensity of the full-Fourier image, whereas the 50% keyhole method degraded the spatial resolution by a factor of two and decreased the lesion signal intensity by 19% for a 2 x 2-pixel region of interest. Histopathologic correlation was attained in 32 lesions in 28 patients. Sensitivity was 100% (five of five) and specificity was 89% (24 of 27). CONCLUSION: The asymmetric half-Fourier 3D MR imaging technique allows imaging of both breasts and axillae without loss of lesion contrast or temporal resolution and provides the maximum spatial resolution and lesion signal intensity attainable for the views sampled.
机译：目的：评估不对称半傅立叶三维（3D）磁共振（MR）成像能力，以表征造影剂注入后乳房和腋窝的信号强度变化，并比较空间分辨率和测得的不对称和对称信号强度变化对称（锁孔）部分傅里叶技术。材料与方法：在28名成年患者中，通过在最后10秒钟内推注造影剂，收集单个全傅里叶3D数据集，然后收集六个半傅里叶3D数据集，而没有图像间延迟，进行了成像。对比度后的锁眼和半傅立叶图像是从相同的全傅立叶原始数据集中形成的。结果：非对称半傅里叶3D技术保持了整个傅里叶图像的空间分辨率和病变信号强度，而50％锁孔方法将空间分辨率降低了2倍，而对于3D图像，病变信号强度降低了19％。 2 x 2像素感兴趣区域。在28例患者的32个病变中获得了组织病理学相关性。敏感性为100％（五分之五），特异性为89％（27之24）。结论：非对称半傅里叶3D MR成像技术可对乳房和腋窝进行成像，而不会损害病变的对比度或时间分辨率，并提供了所采样视图可获得的最大空间分辨率和病变信号强度。

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