首页>
外国专利>
T2 restoration and noise suppression null of the hybrid MR image which uses the technology of Wiener and
T2 restoration and noise suppression null of the hybrid MR image which uses the technology of Wiener and
展开▼
机译:使用Wiener和Wiener技术的混合MR图像的T2恢复和噪声抑制无效
展开▼
页面导航
摘要
著录项
相似文献
摘要
Hybrid imaging (HI) sequences used for magnetic resonance (MR) imaging and inherently degraded by T2 effects and additive measurement noise are enhanced. Wiener filter and linear prediction (LP) technique is used to process HI MR signals in the spatial frequency domain (K-space) and the hybrid domain respectively. Based on the average amplitude symmetry constraint of the spin echo signal, the amplitude frequency response function of the T2 distortion is estimated and used in the Wiener filter for a global T2 amplitude restoration. Then a linear prediction technique is utilized to obtain local signal amplitude and phase estimates around discontinuities of the frequency response function of the equivalent T2 distortion filter. These estimates are used to make local amplitude and phase corrections. The effectiveness of this combined technique in correcting T2 distortion and reducing the measurement noise is analyzed and demonstrated using experiments on both phantoms and humans.
展开▼