Bias field correctionCompressed sensingParallel imagingMagnetic resonance imagingParallel imaging and compressed sensing (PICS) may accelerate magnetic resonance imaging (MRI) acquisition with advanced reconstruction algorithms from under-sampled data set. However, bias field effects are often present in ...
摘要,图像中存在的灰度不均匀现象与演化曲线被错误的目标边缘引导给图像的多相分割带来了很大困难。针对这一问题,利用对数变换将乘性偏移场转化成线性偏移场,通过核函数引入局部灰度信息建立了偏移场矫正模型。此外,运用水平集函数与图像梯度的方向信息重建了边缘指示函数,增强了演化曲线对正确目标边缘的识别能力。人工合成...
Gilles, S., Brady, M., Declerck, J., Thirion, JP., Ayache, N. (1996). Bias field correction of breast MR images. In: Höhne, K.H., Kikinis, R. (eds) Visualization in Biomedical Computing. VBC 1996. Lecture Notes in Computer Science, vol 1131. Springer, Berlin, Heidelberg. ht...
Intensity inhomogeneity is a great challenge for automated organ segmentation in magnetic resonance (MR) images. Many segmentation methods fail to deliver satisfactory results when the images are corrupted by a bias field. Although inhomogeneity correction methods exist, they often fail to remove the ...
6) bias field correction 偏移场估计补充资料:场内交易与场外交易 场内交易与场外交易 商进行证券买卖。③场内交易采用集中竞价的方式成交;场外交易一般都以当面议价的方式成交。④场内交易必须是上市证券的交易;而场外交易可以是上市证券和非上市证券的交易。⑤场内交易只按规定办理一个交易单位或其倍数的交易;而场外...
The bias field correction is to remove the unbalanced bias field of the original images by using a two-dimensional polynomial fitting algorithm, and the spatial attention module is to extract robust vein patterns from the input finger vein image through paying more attention to the informative ...
2) Bias correction 偏场校正 3) pulse bias 脉冲偏场 4) low bias field 低偏场 5) bias field 有偏场 1. A Modified Fuzzy C-Means Segmentation Algorithm for Illumination Pattern-based Images under Bias Field; 基于有偏场的光栅图像模糊聚类分割算法 ...
Bias field correction of MPRAGE by an external reference -- The poor man's MP2RAGE Purpose: To implement and evaluate a sequential approach to obtain\nsemi-quantitative T1-weighted MPRAGE images, unbiased by B1 inhomogeneities at\n7T.\nMe... H Olsson,G Helms 被引量: 0发表: 2021年 加载...
This work presents a new algorithm (nonuniform intensity correction; NIC) for correction of intensity inhomogeneities in T1-weighted magnetic resonance (MR... JD Gispert,S Reig,J Pascau,... - 《Human Brain Mapping》 被引量: 139发表: 2004年 Unifying framework for multimodal brain MRI segmentati...
Most correction strategies aim at correcting the combined (transmit and receive) bias field via post-processing techniques. This can be done either by low-pass filtering (Cohen et al., 2000, Wald et al., 1995) or by fitting slowly varying functions such as Gaussians or low order polynomials...