相关实验视频

Updated: Sep 18, 2025

Preparation and In Vitro Characterization of Dendrimer-based Contrast Agents for Magnetic Resonance Imaging

Preparation and In Vitro Characterization of Dendrimer-based Contrast Agents for Magnetic Resonance Imaging

Published on: December 4, 2016

用于磁共振成像的加多结合脂酸水凝

Andrew R Brotherton¹, Bennett Phillips-Sorich¹, Naedum DomNwachukwu^2,3

¹Department of Chemistry, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States.

ACS applied bio materials

|June 23, 2025

概括

一种新型的脂酸水凝 (Gd 3+ 凝) 通过增加放松性和最大限度地减少泄漏,增强磁共振成像 (MRI) 对比剂. 这种可注射的水凝对追踪内部损伤和愈期间的有针对性的成像显示出希望.

科学领域:

生物医学工程生物医学工程
材料科学材料科学材料科学
放射学放射学是一门学科.

背景情况:

基于加多的对比剂 (GBCA) 对MRI至关重要.
开发稳定有效的GBCA输送系统对于先进的成像是必不可少的.
脂酸 (LA) 水凝具有作为生物相容支架的潜力.

研究的目的:

为了合成和表征含有加多基对比剂 (Gd³⁺SS) 的脂酸水凝,用于增强的MRI.
评估Gd³⁺结合凝 (Gd³⁺Gel) 的磁性特性,稳定性和体外*行为.
评估Gd³⁺凝用于追踪内部损伤和有针对性的成像应用的潜力.

主要方法:

将Gd³⁺SS与脂酸水凝的结合.
在不同磁场强度下测量放松度 (r₁) 和旋转相关时间 (τ_r).
在体外保留研究中,比较了共价和非共价结合.
细胞活力测定 (PC3-PIP,RAW 264.7) 和细胞吸收研究 (ICP-MS,共聚焦显微镜).
风湿学分析以确定水凝粘度.

主要成果:

在1.4 T时,Gd³⁺凝显示了2.8倍的放松性 (r₁) 增强,这是由于旋转相关时间 (τ_r) 的增加.
在水凝中,Gd³⁺SS的共价保留率明显高 (64.7%),与非共价结合的加多酸盐 (14.0%) 相比.
水凝放松率随着凝度的Gd³⁺显著增加.
用Gd³⁺SS维持细胞活力,但用Gd³⁺Gel减少,与LA效应一致;细胞吸收受到水凝结构的限制.
病理学证实了LA水凝的可注射性质.

结论:

脂酸水凝有效地提高了MRI对比剂的性能.
凝表现出极好的保留能力,最大限度地减少GBCA漏.
由于Gd³⁺Gel的可注射性和稳定性,使其成为有希望的候选人,用于针对性地跟踪内部损伤和在愈合过程中进行受控成像.

关键词:

这就是为什么MRI是MRI.卡多利尼姆 (gadolinium) 是一种电子产品.这是一种水凝.脂酸脂肪酸的使用方法放松性放松性

更多相关视频

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release

Magnetic and Thermal-sensitive PolyN-isopropylacrylamide-based Microgels for Magnetically Triggered Controlled Release

Published on: July 4, 2017

相关概念视频

Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

Imaging Studies I: CT and MRI

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...

Imaging Studies for Cardiovascular System IV: CMRI

Imaging Studies for Cardiovascular System IV: CMRI

Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...