Hou Zujun
Biomedical Imaging Lab., Singapore Bioimaging Consortium, 30 Biopolis Street, Matrix #07-01, 138671, Singapore.
Int J Biomed Imaging. 2006;2006:49515. doi: 10.1155/IJBI/2006/49515. Epub 2006 Aug 7.
Intensity inhomogeneity (IIH) is often encountered in MR imaging, and a number of techniques have been devised to correct this artifact. This paper attempts to review some of the recent developments in the mathematical modeling of IIH field. Low-frequency models are widely used, but they tend to corrupt the low-frequency components of the tissue. Hypersurface models and statistical models can be adaptive to the image and generally more stable, but they are also generally more complex and consume more computer memory and CPU time. They are often formulated together with image segmentation within one framework and the overall performance is highly dependent on the segmentation process. Beside these three popular models, this paper also summarizes other techniques based on different principles. In addition, the issue of quantitative evaluation and comparative study are discussed.
强度不均匀性（IIH）在磁共振成像中经常出现，并且已经设计了许多技术来校正这种伪影。本文试图回顾IIH场数学建模的一些最新进展。低频模型被广泛使用，但它们往往会破坏组织的低频成分。超曲面模型和统计模型可以适应图像并且通常更稳定，但它们通常也更复杂，消耗更多的计算机内存和CPU时间。它们通常在一个框架内与图像分割一起制定，整体性能高度依赖于分割过程。除了这三种流行的模型之外，本文还总结了基于不同原理的其他技术。此外，还讨论了定量评估和比较研究的问题。
