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相关概念视频

Dialysis01:15

Dialysis

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Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
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Lenz's Law01:15

Lenz's Law

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The direction in which the induced emf drives the current around a wire loop can be found through the negative sign. However, it is usually easier to determine this direction with Lenz's law, named in honor of its discoverer, Heinrich Lenz (1804–1865). Lenz's law states that the direction of the induced emf drives the current around a wire loop always to oppose the change in magnetic flux that causes the emf.
If a bar magnet is moved toward a coil such that the magnetic flux...
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Photosystem II01:22

Photosystem II

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The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
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Accessory Structures of the Eye

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Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
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Transcription Elongation Factors

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Transcription elongation is a dynamic process that alters depending upon the sequence heterogeneity of the DNA being transcribed. Hence, it is not surprising that the elongation complex's composition also varies along the way while transcribing a gene.
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EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
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Updated: Jul 27, 2025

Design and Validation of a Volumetric-extrusion Bioprinter for Bioprinting of Soluble Basement Membrane Extract for Translational Research
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[] 现在的情况是.

Bram van Leer1,2, Johannes H van Snick1, Mark Londema1,2

  • 1Medical Imaging Center, Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.

Clinical and translational imaging
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PubMed
概括
此摘要是机器生成的。

[18F]FDG-PET/CT成像有助于确定COVID-19重症患者持续炎症的原因. 这种安全的成像技术有助于诊断机械通风患者的二次感染和炎症状况.

关键词:
在 ARDS 中,ARDS 是指 ARDS 的类型.在 COVID-19 疫情中,危急病患者的病情非常严重.在ICU中,医生会对患者进行治疗.持续的炎症持续的炎症[18F]FDG-PET/CT/CT/FDG-PET/CT/CT/FDG-PET/CT/CT/CT/FDG-PET/CT/CT/FDG-PET/CT/CT/CT

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科学领域:

  • 医疗成像医学成像
  • 核医学是一种核医学.
  • 传染性疾病 传染性疾病

背景情况:

  • 持久性炎症是重症COVID-19患者面临的挑战.
  • 常规的实验室检查在区分炎症和二次感染方面存在局限性.
  • pozitron发射断层扫描/计算机断层扫描 (PET/CT) 提供了先进的成像功能.

研究的目的:

  • 为了评估[18F]FDG-PET/CT在患有持续炎症的重症COVID-19患者的诊断价值.
  • 为了识别潜在的二次感染或炎症焦点.
  • 评估[18F]FDG-PET/CT在机械呼吸患者中的安全性.

主要方法:

  • 对四名机械呼吸的COVID-19患者的回顾性分析.
  • 使用[18F]FDG-PET/CT成像来评估炎症.
  • 与临床数据和实验室结果相关联的成像发现.

主要成果:

  • 肺部PET/CT检测结果各不相同,但表明双边肺部异常解释了炎症标志物升高.
  • 在两个患者中怀疑二次感染/炎症焦点 (胰腺炎,胃炎).
  • 在可检测SARS-CoV-2病毒载荷的患者中观察到淋巴腺病;在所有患者中观察到肌肉吸收,可能与异型骨化有关.

结论:

  • [18F]FDG-PET/CT是诊断重症COVID-19患者持续炎症原因的宝贵工具.
  • 图像技术可以安全地识别二次感染和炎症状况.
  • PET/CT增强了诊断能力,超出了例行实验室评估的范围.