Volume 36, Issue 2

We present an algorithm for resampling a function from its values on a non-Cartesian grid onto a Cartesian grid. This problem arises in many applications such as MRI, CT, radio astronomy and geophysics. Our algorithm, termed SParse Uniform ReSampling (SPURS), employs methods from modern sampling theory to achieve a small approximation error while maintaining low computational cost. The given non-C...

我们提出了一种算法，用于将函数从非笛卡尔网格上的值重采样到笛卡尔网格上。这个问题出现在许多应用中，如MRI、CT、射电天文学和地球物理学。我们的算法称为稀疏均匀重采样（SPURS），它采用现代采样理论的方法，在保持低计算成本的同时实现小的近似误差。给定的非...

Dynamic contrast-enhanced magnetic resonance angiography (DCE MRA) has been widely used as a clinical routine for diagnostic assessment of vascular morphology and hemodynamics. It requires high spatial and temporal resolution to capture rapid variation of DCE signals within a limited imaging time. Subtraction-based approaches are typically employed to selectively delineate arteries while eliminati...

动态对比增强磁共振血管造影（DCE MRA）已广泛应用于血管形态和血流动力学的临床诊断评估。它需要在有限的成像时间内具有高空间和时间分辨率，以捕获DCE信号的快速变化。通常采用基于减影的方法来选择性描绘动脉，同时消除...

We present a quantitative validation study to assess the accuracy of low-frequency conductivity imaging methods, based on a testing current measured using Current Density Imaging (CDI). We tested the proposed procedure to study the influence of tissue anisotropy on the accuracy of conductivity reconstruction methods, using a finite element model of anisotropic brain tissue. Simulations were carrie...

我们提出了一项定量验证研究，基于使用电流密度成像（CDI）测量的测试电流，评估低频电导率成像方法的准确性。我们测试了所提出的程序，以研究组织各向异性对电导率重建方法准确性的影响，使用了一个各向异性脑组织的有限元模型。进行了模拟...

Physiological motion combined with elongated scanning times in PET leads to image degradation and quantification errors. Correction approaches usually require 1-D signals that can be obtained with hardware-based or data-driven methods. Most of the latter are optimized or limited to capture internal motion along the superior-inferior (S-I) direction. In this work we present methods for also extract...

PET中生理运动与延长扫描时间相结合会导致图像退化和量化误差。校正方法通常需要一维信号，这些信号可以通过基于硬件或数据驱动的方法获得。大多数数据驱动方法被优化或限制为捕获沿头尾（S-I）方向的内部运动。在这项工作中，我们提出了提取...的方法

Optical coherence tomography (OCT) is a non-invasive imaging technique used to study and understand internal structures of biological tissues such as the anterior chamber of the human eye. An interesting problem is the reconstruction of the shape of the biological tissue from OCT images, that is not only a good fit of the data but also respects the smoothness properties observed in the images. A s...

光学相干断层扫描（OCT）是一种非侵入性成像技术，用于研究和理解生物组织（如人眼前房）的内部结构。一个有趣的问题是从OCT图像重建生物组织的形状，这不仅要很好地拟合数据，还要尊重图像中观察到的平滑性质。一...

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这些说明为准备投稿给本刊的论文提供了指南。为在本刊发表文章的作者提供信息。

Describes the above-named upcoming special issue or section. May include topics to be covered or calls for papers.

描述上述即将到来的特刊或专栏。可能包括涵盖的主题或征稿启事。

Presents the table of contents for this issue of the publication.

展示本期出版物的目录。

Provides a listing of the editorial board, current staff, committee members and society officers.

提供编辑委员会、现任工作人员、委员会成员和学会官员的列表。