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Imaging Studies III: Computed Tomography01:27

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
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对于pH敏感的含的水凝系统,用于增强肠道计算机断层成像.

Wenyu Chen1, Na Li2, Xianhe Liu3

  • 1College of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, P. R. China.

Langmuir : the ACS journal of surfaces and colloids
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概括
此摘要是机器生成的。

这项研究开发了一种新的pH敏感的水凝系统,用于向肠道输送IOhexol (IOH). 该系统在模拟的肠液中展示了受控释放,增强了CT对比度,以便更好地进行肠道成像.

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科学领域:

  • 生物材料科学 生物材料科学
  • 放射学 放射学是一门学科.
  • 药物运输 药物运输 药物运输

背景情况:

  • 醇 (IOH) 是一种非离子对比剂,在肠道CT成像中具有局限性,原因是保持不良.
  • 目前的对比剂面临着延长血液循环和不充分的胃肠保留的挑战.

研究的目的:

  • 开发一种肠道向系统,以改善口服非离子对比剂的输送.
  • 为了提高iohexol在肠道CT成像中的有效性.

主要方法:

  • 开发pH敏感的水凝,以封装 perfluorocarbon 滴滴,用于输送iohexol.
  • 使用温度响应相位过渡来评估结构稳定性.
  • 在模拟的胃 (pH1.2) 和肠道 (pH7.4) 液体中评估IOHEXOL释放概况.
  • 细胞CT对比度增强和细胞形态保存的测试.

主要成果:

  • 液凝系统在60分钟内在模拟的胃液中显示了最小的iohexol释放 (9%).
  • 在模拟的肠液 (pH 7.4) 中观察到快速和显著的醇释放 (在30分钟内80%).
  • 该配方增强了细胞CT对比度,而不改变细胞形态.

结论:

  • 开发的肠道向系统有效地提供具有pH依赖释放特性的iohexol.
  • 该系统显示出作为一种改进的口服非离子对比剂,用于诊断肠道疾病的潜力.
  • 封装在 perfluorocarbon 的水凝提供了增强的结构稳定性和有针对性的药物释放.