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相关概念视频

Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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...
Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT01:25

Imaging Studies for Cardiovascular System VI: Calcium -Scoring CT

Calcium-Scoring CT ScanA calcium-scoring CT scan, also known as coronary artery calcium (CAC) scan, detects calcium deposits in the coronary arteries. This test assesses the risk of coronary artery disease (CAD), which can lead to cardiovascular events such as angina, heart failure, and sudden cardiac arrest.A calcium-scoring CT scan is generally recommended for individuals at intermediate risk of CAD without symptoms. It includes:Men aged 40-75 and women aged 50-75: Especially those with a...
Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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...
Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...

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相关实验视频

聚合物发光的电化学电池.

Q Pei, G Yu, C Zhang

    Science (New York, N.Y.)
    |August 25, 1995
    PubMed
    概括

    研究人员使用电活性聚合物开发了新的发光电化学细胞. 这种装置在现场创建一个p-n连接点,使低开启电压的光能有效发射.

    科学领域:

    • 材料科学 材料科学 材料科学
    • 电化学 电化学 电化学
    • 聚合物科学 聚合物科学

    背景情况:

    • 结合聚合物为发光器件提供了潜在的潜力.
    • 现有的设备在效率和操作机制方面面临挑战.

    研究的目的:

    • 描述一种用于电活性聚合物发光的新装置配置.
    • 用现场电化学兴奋剂机制来证明高效的光发射.

    主要方法:

    • 使用结合聚合物薄膜制造发光电化学电池.
    • 在现场进行电化学兴奋剂,以创建p-n连接.
    • 加入电解质用于对电供应.

    主要成果:

    • 成功制造基于合聚合物的发光装置.
    • 通过电化学氧化减少机制证明光辐射.
    • 在低开启电压下实现了蓝色,绿色和色光的发射.

    结论:

    • 拟议的设备配置使电活性聚合物能够有效发射光.
    • 在现场电化学兴奋剂是一种可行的机制,可以在这些设备中创建p-n连接.

    相关实验视频

  • 该技术在各种发光应用中显示出前途.