相关实验视频

Updated: Jul 11, 2026

Making MR Imaging Child's Play - Pediatric Neuroimaging Protocol, Guidelines and Procedure
15:18

Making MR Imaging Child's Play - Pediatric Neuroimaging Protocol, Guidelines and Procedure

Published on: July 30, 2009

新生儿,婴儿和儿童中的玛发射放射性核子

N S MACDONALD, D L HUTCHINSON, D L MOYER

    Science (New York, N.Y.)
    |September 13, 1963
    PubMed
    概括

    1962年至1963年,新生儿和儿童显示有微量放射性同位素,如-137 (Cs-137) 和-95 (Zr-95). 生死婴儿的Zr-95与Niobium-95 (Nb-95) 比率较低,这表明胎盘转移的差异.

    关键词:
    青春期的青春期的青春期凯西乌姆的标本是斯托佩斯.孩子是一个孩子.胎儿死亡的死亡一个婴儿,一个新生儿.的同位素是的同位素.代谢过程中的代谢.诺贝利乌姆 (NOBELIUM) 是一个名为诺贝利乌姆的书.胎盘 在胎盘上的同位素 的同位素辐射的影响 辐射影响辐射监测 辐射监测卢比迪乌姆 (RUBIDIUM) 是一个古老的词汇.甲状腺腺体 甲状腺体合金是合金中的一种.

    更多相关视频

    Whole-body PET/MRI of Pediatric Patients: The Details That Matter10:02

    Whole-body PET/MRI of Pediatric Patients: The Details That Matter

    Published on: December 19, 2017

    Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies08:34

    Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies

    Published on: February 6, 2019

    相关概念视频

    Radioactivity and Nuclear Equations03:18

    Radioactivity and Nuclear Equations

    Nuclear chemistry is the study of reactions that involve changes in nuclear structure. The nucleus of an atom is composed of protons and, except for hydrogen, neutrons. The number of protons in the nucleus is called the atomic number (Z) of the element, and the sum of the number of protons and the number of neutrons is the mass number (A). Atoms with the same atomic number but different mass numbers are isotopes of the same element.
    A nuclide of an element has a specific number of protons and...
    Types of Radioactivity03:23

    Types of Radioactivity

    The most common types of radioactivity are α decay, β decay, γ decay, neutron emission, and electron capture.
    Alpha (α) decay is the emission of an α particle from the nucleus. For example, polonium-210 undergoes α decay:
    Biological Effects of Radiation02:59

    Biological Effects of Radiation

    All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
    Positron Emission Tomography01:29

    Positron Emission Tomography

    Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
    One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
    Isotopes and Radioisotopes01:28

    Isotopes and Radioisotopes

    In the early 1900s, English chemist Frederick Soddy realized that an element could have atoms with different masses that were chemically indistinguishable. These different types are called isotopes — atoms of the same element that differ in mass. Isotopes differ in mass because they have different numbers of neutrons but are chemically identical because they have the same number of protons. Soddy was awarded the Nobel Prize in Chemistry in 1921 for this discovery.
    An isotope containing more...
    Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

    Imaging Studies II: Positron Emission Tomography and Scintigraphy

    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