Half-Fourier, three-dimensional technique for dynamic contrast-enhanced MR imaging of both breasts and axillae: Initial characterization of breast lesions
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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DOI：
10.1148/radiology.200.1.8657924
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发表时间：
1996-07-01
期刊：
影响因子：
19.7
通讯作者：
Herrmann, VM
中科院分区：
文献类型：
--
作者：
Perman, WH;Heiberg, EV;Herrmann, VM
目的：评估非对称半傅里叶三维 (3D) 磁共振 (MR) 成像表征造影剂注射后乳房和腋窝信号强度变化的能力，并比较非对称和对称（锁孔）部分傅里叶技术的空间分辨率和测量的信号强度变化。 材料和方法：通过收集单个全傅里叶 3D 数据集并在注射造影剂期间收集单个全傅里叶 3D 数据集，对 28 名成年患者进行成像。最后 10 秒收集六个半傅立叶 3D 数据集，无图像间延迟。对比后锁孔和半傅立叶图像由相同的全傅立叶原始数据集形成。 结果：非对称半傅立叶 3D 技术保持了全傅立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两倍，并将 2 x 2 像素感兴趣区域的病变信号强度降低了 19%。 28名患者32个病灶。灵敏度为 100%（五分之五），特异性为 89%（27 分中的 24 分）。结论：非对称半傅里叶 3D MR 成像技术可以对乳房和腋窝进行成像，而不会损失病变对比度或时间分辨率，并提供采样视图可获得的最大空间分辨率和病变信号强度。
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.