Image registration by maximization of combined mutual information and gradient information
基于互信息和梯度信息最大化的图像配准
Body Part 身体部位
Modality 模态
Volume 19, Issue 8
5 articles collected from IEEE Xplore web pages.
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2026/06/07 08:59
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Body Part 身体部位
Modality 模态
Abstract / 摘要
A new implementation of the minimum spanning tree (MST) phase unwrapping method is presented. The time complexity of the MST method is reduced from O(n/sup 2/) to O(n log/sub 2/ n), where n is the number of pixels in the phase map. Typical 256/spl times/256 phase maps from magnetic resonance imaging can be unwrapped in seconds, compared with tens of minutes with the O(n/sup 2/) implementation. Thi...
提出了一种新的最小生成树（MST）相位展开方法的实现。该方法的时间复杂度从O(n²)降低到O(n log₂ n)，其中n是相位图中的像素数。典型的256×256磁共振相位图可以在几秒内展开，而O(n²)的实现则需要几十分钟。
Performance characteristics of the 3-D OSEM algorithm in the reconstruction of small animal PET images
三维OSEM算法在小动物PET图像重建中的性能特征
Body Part 身体部位
Modality 模态
Abstract / 摘要
Rat brain images acquired with a small animal positron emission tomography (PET) camera and reconstructed with the three-dimensional (3-D) ordered-subsets expectation-maximization (OSEM) algorithm with resolution recovery have better quality when the brain is imaged by itself than when inside the head with surrounding background activity. The purpose of this study was to characterize the dependenc...
使用小动物正电子发射断层扫描（PET）相机获取并经三维有序子集期望最大化（OSEM）算法（具有分辨率恢复功能）重建的大鼠脑图像，当单独成像时比在头部内且有周围背景活动时质量更好。
Nonparametric regression sinogram smoothing using a roughness-penalized Poisson likelihood objective function
使用粗糙度惩罚泊松似然目标函数进行非参数回归正弦图平滑
Body Part 身体部位
Modality 模态
Abstract / 摘要
The authors develop and investigate an approach to tomographic image reconstruction in which nonparametric regression using a roughness-penalized Poisson likelihood objective function is used to smooth each projection independently prior to reconstruction by unapodized filtered backprojection (FBP). As an added generalization, the roughness penalty is expressed in terms of a monotonic transform, k...
作者开发并研究了一种断层图像重建方法，其中使用粗糙度惩罚泊松似然目标函数进行非参数回归，在每个投影独立平滑后，通过未切趾滤波反投影（FBP）进行重建。作为额外的推广，粗糙度惩罚用单调变换表示，k...
Body Part 身体部位
Modality 模态
Abstract / 摘要
Software for categorizing a cloud of more than 300,000 three-dimensional (3-D) surface data points, captured from a human subject, is presented. The software is part of an incremental approach that progressively refines the identification of human anthropometric landmarks. The first phase of identification is to orient and segment the human body data points. A step-by-step method for these tasks i...
本文介绍了一种用于对从人体捕获的超过30万个三维（3-D）表面数据点云进行分类的软件。该软件是一种渐进式方法的一部分，逐步完善人体测量学标志的识别。识别的第一阶段是定向和分割人体数据点。本文详细介绍了这些任务的逐步方法...