[从OSEM和BPL重建的F-FDG PET-MRI在叶焦点定位中的不对称性指数的差异比较]
1Department of Nuclear Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology Hubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China.
Zhonghua yi xue za zhi
|January 26, 2026
概括
贝叶斯惩罚概率 (BPL) 和有序子集预期最大化 (OSEM) 重建方法显示使用18F-FDG PET-MRI的叶焦点定位具有类似的诊断价值. 这两种方法都有效地识别了发性区域,在焦点定位的不对称指数 (AI) 中没有显著差异.
科学领域:
- 核医学是一种核医学.
- 神经学 神经学
- 医疗成像医学成像
背景情况:
- 叶 (TLE) 诊断依赖于准确的焦点定位.
- F-化氧糖 (F-FDG) PET-MRI是TLE成像的一个有价值的工具.
- 图像重建方法,如有序子集预期最大化 (OSEM) 和贝叶斯惩罚概率 (BPL),可以影响诊断准确性.
研究的目的:
- 为了评估TLE焦点定位的不对称指数 (AI) 的诊断值.
- 在F-FDG PET-MRI上比较来自OSEM和BPL重建方法的AI.
- 评估不同BPLβ值 (β=150和β=350) 对AI计算的影响.
主要方法:
- 横截面研究分析了18名TLE患者的F-FDG PET-MRI数据.
- 使用OSEM,BPL (β=150) 和BPL (β=350) 重建了PET图像.
- 不对称指数 (AI) 为9个双边大脑区域计算,以小脑皮质为参考.
主要成果:
- 在小脑皮层的F-FDG吸收 (SUV平均) 与BPL方法相比,与OSEM (P<0.001) 相比,BPL方法更高.
- 对于小脑皮层和传播区域的重建方法,在AI中没有发现显著差异 (P>0.05).
- 在发性区域,与OSEM (P=0.048) 相比,BPL (β=350) 的AI较低,但与BPL (β=150) 没有显著差异.
结论:
- BPL重建方法显示了与OSEM可比的诊断价值,用于使用F-FDG PET-MRI在TLE中定位发作焦点.
- 来自BPL重建图像的AI有效地帮助TLE焦点定位.
- 重建方法的选择 (OSEM与BPL) 并没有显著改变基于AI的TLE发性区域的局部化.
相关概念视频
Membrane Asymmetry Regulating Transporters
7.1K
Enzymes like flippase, floppase, and scramblase transfer phospholipids from one layer to another in the membrane, thereby affecting membrane asymmetry.
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
7.1K
Lobes of the Cerebrum
4.5K
The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements....
4.5K
The Sense of Self: Reflected Self-Appraisal and Social Comparison
55.9K
According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
55.9K
Difference from Background: Limit of Detection
8.3K
The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
The LOD indicates the presence or absence...
8.3K
Electric Potential and Potential Difference
5.7K
Suppose a positive test charge moves away from a positive static charge, then the Coulomb force does positive work, and its electric potential energy decreases. The potential energy per unit charge is defined as the electric potential. The electric potential is independent of the test charge.
When a test charge moves from the initial to the final position, the electric potential difference between those positions is defined as the ratio of the change in the potential energy to the charge on the...
When a test charge moves from the initial to the final position, the electric potential difference between those positions is defined as the ratio of the change in the potential energy to the charge on the...
5.7K
Epilepsy and Seizures: Overview
1.3K
Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
1.3K


![Visualization and Quantification of Brown and Beige Adipose Tissues in Mice using [18F]FDG Micro-PET/MR Imaging](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F62460.jpg&w=3840&q=50)