Survey Radiologic Technologist
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What is nuclear medicine?
Is a medical specialty that focuses on the use of radioactive materials called radiopharmaceuticals for diagnosis, theraphy and medical research.
What is introuduce to the body in nuclear medicine?
A tracer is introduced into the body by injection, swalloing, or inhalation.
How is the amount of radioactive tracer material selected?
It is selected carefully to provide the lowest amou of radiation exposure to the patient and still ensure a satisfactory examination or therapeutic goal.
What do radiactive tracers produce?
They produce gamma-ray emissions (similar to x-rays but at a higher energy) from within the organ being studied.
What is the equipement used to transform the gamma-ray emissions into images that provide information about the function and anatomy of the organ or system being studied?
Equipment known as gamma or scintilllation camera.
By whom are the nuclear medicine procedures performed by?
- Nuclear Medicine Physician
- Nuclear Medicine Technologist
What was the one of the first organs to be examined in nuclear medicine and by what?
The thyroid glan using external radiation detectors.
In the 1940s investigators found that that the reate of absoprtion of radioactive iodine was greatly?
- Increased in cases of hyperthyroidism.
- Decreased in cases of hypothyroidism.
What is radioactivity?
Is used to describe the release or emission of energy in the form of high-speed alpha or beta particles or waves (gamma rays) from the neclues of an atom.
What is an atom composed of?
A nucleus at the center of the atom and electrons orbiting around the nucleus.
What is the nucleus composed of?
- Protons which have a positive charge as well as mass, and
- Neutrons which have mass but no electronic charge.
What identifies the an element?
It is the number of protons that determine the identify of an element.
What are isotopes?
Atoms, which have the samenumber of protons, but different numbers of neutrons, are called isotopes.
What is half-life?
Half-lives vary from milliseconds to years. The half-life of the isotopes used in Nuclear medicine usually range from hours to several days.
How many radiopharmaceuticals used in nuclear medicine?
There are more t han 30 different.
What are some of the commonly used radiopharmaceuticals?
Chromium, Cobalt, Indium, Iodine, thallium , and Xenon
How can radiation be detected?
Statically, as in a snapshot showing where the radioactivity was absorbed.
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