Test 1 Chapters 1,2 Flashcards
What are Photons?
X-rays and Gamma Rays
That have no mass and no charge!
Gamma rays come from —-
X-rays come from—-
The nucleus
The electron cloud
The letter that represents the innermost electron Shell is?
K
An atom in its normal state has a charge of ??
Zero!
The study of interactions of matter and energy
Physics
In mechanics, the 3 base measures are?
Mass, length, and time
What is the speed of light?
Velocity
Standard unit SI
Second (s)
The unit of Energy
Joule
The unit of Heat is?
A calorie
Rem=
Sv
The source of electrons come from the
The target material is
Cathode
Tungsten
How is R measured?
Ion pairs
An ion pair is
The lost electron and the remaining positive atom
Isotopes are used in which type of radiation?
Nuclear medicine
They have same # in protons and different # of neutrons
Energy binding energy
Binding energy is higher when closer to the nucleus
Shells
Most important elements in Radiology?
Tungsten -X-ray tubes
Barium and iodine -contrast media
Carbon -human tissues
What is a half value layer?
The quantity to determine quality of the beam. (MAs)
What is the principal difference between mass and weight?
Mass=energy
Weight= th force exerted by gravity
X-rays are most like what?
Gamma rays
What is the transfer of energy?
Radiation!
3 types of energy used in radiation:
Electrical
Electromagnetic
Chemical
The largest source of environmental radiation?
Radon-radioactive decay of uranium(such as a sewage)
The largest source of man made radiation?
X-rays !
What equipment is responsible of an increase in the annual man made radiation?
Computed Tomography
