列表模式TOF-PET3D图像重建使用随机初级-双元网络
Kun Tian1, Rui Hu1, Yiming Wan1
1State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, People's Republic of China.
Medical physics
|February 15, 2026
概括
一种新的深度学习方法LM-SPD-Net直接从列表模式数据中重建正电子发射断层扫描 (PET) 图像. 这种方法提高了图像质量,并克服了飞行时间 (TOF) PET重建中的计算挑战.
科学领域:
- 核医学成像技术 核医学成像技术
- 医疗图像重建 医疗图像重建
- 深度学习应用程序
背景情况:
- 定子发射断层扫描 (PET) 为可视化生物活动提供了高灵敏度.
- 传统的PET成像在空间分辨率和信号噪声比 (SNR) 上面临限制.
- 飞行时间 (TOF) 数据集成提高了PET图像质量,但增加了计算需求.
研究的目的:
- 引入一个新的深度学习框架,用于直接列表模式PET图像重建.
- 解决与TOF-PET数据相关的计算和内存挑战.
- 为了提高重建的PET图像的质量.
主要方法:
- LM-SPD-Net,一个列表模式的TOF-PET重建框架,使用一个随机原始双重网络架构.
- 一个用于图像域处理的原始模块 (CNN) 和一个用于数据域特征的双模块 (FCNN).
- 整合基于物理的投影模型和子集分区,以实现高效的3D重建.
主要成果:
- 与LM-OSEM,LM-SPDHG和Fast-PET相比,LM-SPD-Net显示出更高的性能.
- 在峰值信号与噪声比率 (PSNR) 和结构相似性指数 (SSIM) 度量方面实现了5%-20%的改进.
- 在模拟和半真实临床数据中明显提高图像质量.
结论:
- 拟议的LM-SPD-Net方法有效地重建了高保真度的整体主体结构.
- 在瘤和乳头等临床相关区域保持出色的表现.
- 展示了强的表现,特别是在低计数条件下.
相关概念视频
01:07What is a Mode?
26.8K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
26.8K
02:26Protein Networks
4.6K
An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
4.6K
01:14Ventilatory Modes
1.7K
Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
1.7K
02:18Network Covalent Solids
16.3K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.3K
01:19MALDI-TOF Mass Spectrometry
7.1K
Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
7.1K
01:03Modes of Standing Waves - I
4.1K
A close look at earthquakes provides evidence for the conditions appropriate for resonance, standing waves, and constructive and destructive interference. A building may vibrate for several seconds with a driving frequency matching the building's natural frequency of vibration; this produces a resonance that results in one building collapsing while the neighboring buildings do not. Often, buildings of a certain height are devastated, while other taller buildings remain intact. This...
4.1K