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Radiology 227
Test 1
14
Medical
Undergraduate 3
09/07/2011

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Cards

Term
Electrical Current- SI Unit and Description
Definition
SI Unit- Ampere
Description- The amount of electrons flowing
Term
Absorbed Dose- SI Unit, British Unit, and Description
Definition
SI Unit- Gray
British- RAD
Description- The amount of energy absorbed in each kilogram.
Term
Equivilent Dose- SI Unit, British Unit, and Description
Definition
SI Unit- Sievert
British Unit- REM
Description- The average absorbed dose in a tissue
Term
Exposure- SI Unit, British Unit, and Description
Definition
SI Unit- Coulombs/Kilogram
British Unit- Roentgen
Description- Ionization in air only, scattered electrons.
Term
Charge- SI unit and description
Definition
SI Unit- Coulomb
Description- Physical property of matter that causes force between two charged atoms.
Term
Energy- SI Unit and Description
Definition
SI Unit- Joules
Description- The ability to do work
Term
Electrical Potential- SI Unit and Description
Definition
SI Unit- Volts
Description- Difference in charges between two points
Term
Frequency- SI Unit and Description
Definition
SI Unit- Hertz
Description- The number of cycles per second
Term
Power- SI Unit and Description
Definition
SI Unit- Watts
Description- The amount of electrons present to do work.
Term
The power of 10 factors in descending order
Definition
Tera, Giga, Mega, Kilo, Deci, Centi, Milli, Micro
Term
Define energy as it relates to radiation
Definition
Radiation is energy that travels through space or matter. Must interact with the body's tissues.
Term
The Atomic Theory (Bohr Atom)
Definition
Electrons travel around a dense positively charged nucleus at fixed distances. Each electron occupies a specific electron shell and the outer electron shells determine the chemical properties of the element.
Term
Ionization
Definition
When an atom gains or loses an electron. When it loses one it becomes positive and when it gains one it becomes negative.
Term
Binding Energy
Definition
The amount of energy needed to completely remove the electron from the atom. Electrons in atoms with high atomic numbers have higher binding energies. Binding energy increases as you move closer to the nucleus.
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