سونوگرافی
۹۵/۰۲/۱۷
زباله هستهای
۹۵/۰۲/۱۰
رادیو بیولوژی
۹۵/۰۲/۰۹
مروری بر اثر پرتوها بر رویان و جنین
۹۵/۰۲/۰۷
۳ مطلب با موضوع «مقالات خارجی» ثبت شده است
Procedure Guideline for Diuretic Renography in Children
Society of Nuclear Medicine Procedure Guideline for Diuretic Renography in Children
version 2.0, approved February 7, 1999
Authors: Gerald A. Mandell, MD (DuPont Hospital for Children, Wilmington, DE); Jeffrey A. Cooper, MD (Albany Medical
Center, Albany, NY); Joe C. Leonard, MD (Oklahoma Children’s Memorial Hospital, Oklahoma City, OK); Massoud Majd, MD (Children’s National Medical Center, Washington, DC); John H. Miller, MD (Children’s Hospital Los Angeles, Los Angeles, CA); Marguerite T. Parisi, MD (Children’s Hospital Los Angeles, Los Angeles, CA); and George N. Sfakianakis, MD, PhD (University of Miami School of Medicine, Miami, FL).
Radioactive Decay
Chemical Elements:
There are currently 115 known chemical elements. Elements consist of atoms with a fixed number Z (known as the atomic number) of protons in the nucleus and an equal number of orbital electrons. In addition to protons, the nucleus contains a variable number N of neutrons. Atoms of the same element with different numbers of neutrons are known as isotopes of that element. Elements can have many isotopes, most of which are unstablewhich are unstable.
Nuclides:In general, an atom with atomic number Z, and neutron number N is known as a nuclide. The present applet contains data on more than 2600 nuclides. Approximately 10 % of these nuclides are stable. The total number of protons plus neutrons is known as the mass number A of a nuclide. Hence a nuclide can be specified as follows:
