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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

197
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...
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Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

4.9K
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...
4.9K
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging Studies for Cardiovascular System IV: CMRI

6
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,...
6
Radiological Investigation I: X-ray and CT01:30

Radiological Investigation I: X-ray and CT

214
Radiological investigations, including X-rays and computed tomography (CT) scans, are critical for diagnosing and evaluating various medical conditions. These imaging techniques provide valuable insights into the body's internal structures, aiding in the detection of abnormalities, assessment of disease progression, and development of treatment strategies. This article delves into two primary radiological investigations, chest X-rays and CT scans, outlining their purpose, procedures, and...
214
Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

3
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
3
Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

Imaging Studies II: Positron Emission Tomography and Scintigraphy

86
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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Updated: Jun 6, 2025

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

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用于MR肠道成像的对比剂

A Álvarez-Cofiño Tuñón1, M da Silva Torres1, A Fernández Del Valle1

  • 1Sección de Radiología Abdominal, Servicio de Radiodiagnóstico, Hospital Universitario Central de Asturias (HUCA), Oviedo, Asturias, Spain.

Radiologia
|November 27, 2024
PubMed
概括
此摘要是机器生成的。

磁共振肠道学使用对比剂来可视化肠道. 本综述检查了不同的药物,以获得最佳的胃肠道成像质量和患者舒适度.

关键词:
双相对比剂 是一种双相对比剂.两个相对面的对比.克罗恩氏病是什么 克罗恩氏病是什么患有克罗恩氏病的人.患有炎症性肠道疾病的人.肠道对比剂 肠道对比剂磁力共振的肠道图谱 (Enterografía por resonancia magnética) 是通过磁力共振进行的胃肠道成像检查 胃肠道成像检查图像胃肠道 图像胃肠道炎症性肠道疾病 炎症性肠道疾病磁共振肠道学 磁共振肠道学整体的对比媒介.

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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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Cardiac Magnetic Resonance for the Evaluation of Suspected Cardiac Thrombus: Conventional and Emerging Techniques
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相关实验视频

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Preparation and In Vitro Characterization of Dendrimer-based Contrast Agents for Magnetic Resonance Imaging
11:27

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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
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Cardiac Magnetic Resonance for the Evaluation of Suspected Cardiac Thrombus: Conventional and Emerging Techniques
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科学领域:

  • 放射学和医学成像学 医学成像学
  • 胃肠病学 胃肠病学

背景情况:

  • 磁共振肠道学 (MRE) 是炎症性肠道疾病的关键成像方式.
  • 磁力共振成像技术的进步,包括超快序列和阶段数组线圈,改善了胃肠道成像.
  • 最佳的MRE质量需要使用口服或直肠对比剂进行肠道膨胀,以增强肠壁可视化.

研究的目的:

  • 审查肠道MRI中使用的各种对比剂.
  • 分析它们对图像质量的影响,包括信号强度和光线的外观.
  • 讨论它们在MRE中的临床应用,指示和限制.

主要方法:

  • 在磁共振肠道学中使用的对比剂的文献综述.
  • 对比剂性质的分析:正,负,双相.
  • 评估信号特征 (T1和T2权重) 以及它们对图像解释的影响.

主要成果:

  • 两相对比剂 (例如,PEG,曼尼托尔) 是常用的,提供高强度T2和低强度T1信号.
  • 在T1加权序列上实现"黑色"肠道光线对于评估粘膜增强至关重要.
  • 虽然成本效益高,但当前的双相药物可能会引起患者的不适;理想的阴性药物尚未提供.

结论:

  • 对比剂的选择显著影响MRE图像质量和诊断准确性.
  • 平衡图像增强,患者耐受性和药物可用性对于有效的MRE至关重要.
  • 为了改进MRE检查,对理想的,耐受良好的负对比剂进行进一步的研究是有必要的.