RBP Flashcards
What are the 4 types of particulate radiation?
Subatomic particles: alpha , beta, electrons , protons
These particles possess sufficient kinetic energy to cause ionization; no ionization when these particles are at rest
Which subatomic particle is virtually harmless as an external source of radiation, but very harmful via inhalation or ingestion?
alpha
Which type of particulate radiation is very light?
Beta particles
Which type of particulate radiation represent highly ionizing radiation with a very short range in matter ?
Alpha
What are the types of ionizing radiation?
X-rays , gamma , and UV
Types of non-ionizing radiation
Low energy UV radiation, visible light , infrared rays, microwaves, and radio waves
What is the largest source of natural environmental radiation?
Radon
What is the annual average effective dose from natural background radiation in Canada?
1.8 mSv
What is the largest source of man-made ionizing radiation?
Diagnostic X-rays
What interactions are involved in differential absorption?
- Compton scattering
- Photoelectric effect
- X-rays transmitted through the patient
Which type of interactions do not contribute useful information to the image
Compton
What is differential absorption dependent on?
Atomic number and mass density of the tissue
As atomic number increases, there is no change in _____________ interactions; many more ____________ interactions
Compton; photoelectric
Do X-rays ionize an inner shell electron or an outer shell electron?
Outer shell
