结合k空间和图像空间重建的成像方法和装置

• Format: Patent
• Language: Chinese
• Published: 17.12.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

本发明公开了一种结合k空间和图像空间重建的成像方法和装置，属于磁共振成像领域。该方法首先使用k空间并行成像方法对被测对象在磁共振参数测量所需的多帧成像中得到的带有自动校准信号的欠采样图像帧进行重建；然后针对其他没有自动校准信号的欠采样图像帧数据，在图像空间进行重建。本发明从欠采样数据中生成准确的SENSE方法所需要的灵敏度图，而无需额外采集。该方法产生与传统GRAPPA方法几乎一致的图像，并且没有明显伪影；但是速度却是传统GRAPPA方法的四倍及以上。该方法作为一种自校准的重建方法且无需全采样帧，尤其适合用来加速三维(3D)多帧磁共振成像。 A joint k-space and image-space reconstruction imaging method and a device, relating to the field of magnetic resonance imaging. The method comprises: first, using the k-space parallel imaging method to reconstruct under-sampled image frames having auto-calibration signals of a subject obtained from multi-frame imaging required for the measurement of magnetic resonance parameters; and then performing reconstruction in image space for other under-sampled image frame data without auto-calibration signals. In the method, an accurate sensitivity map required for the SENSE method is generated from under-sampled data, without the need of additional acquisition. By means of the present method, images that are almost identical to those obtained by