DI Quiz I Flashcards
The Physicist that discovered X-rays and won the Nobel prize for his work.
Wilhelm Conrad Roentgen
X-rays are ___% man-made and ___% produced in nature.
- 18%
2. 82%
X-rays are used in…
- Security
- Medical Imaging
- Quality Assurance
X-rays are a type of ________ Radiation and are a product of _____ interactions.
- Electromagnetic
2. Electron
What is the most dangerous aspect of an X-ray?
Ionization that is invisible and cannot be felt.
The amount of energy is _____ proportional to the wavelength.
Inversely
The basic unit of an X-ray.
Electron Volt (eV)
Electromagnetic radiation that is > than ___ eV can produce ionization in living cells.
15 eV
Ionization of DNA may lead to …
- Increased rate of mutation
- Increased Rate of abortion or fetal abnormalities
- Increased Susceptibility of disease
- Increased Risk of cancer
- Increased Risk of cataracts
The primary objective of Radiation Safety is to…
obtain maximum diagnostic information with the minimum exposure of the patient, radiology personnel and the general public.
What does ALARA stand for?
As Low As Reasonably Achievable
Roentgen
Unit of exposure
Rad/Gray
Unit of absorbed dose
Rem/Sievert
Unit of dose equivalent
1Rem = 1000mRem
Average amount of mRem a person receives in 1 year.
360 mRem
True or False: Lead protective gear protects you from both the primary and secondary beams.
False: lead only protects you from scatter radiation
Electrons are produced in the ______ and the X-ray is produced from the _____.
- Cathode (-)
2. Anode (+)
Electron current is measured in ____.
Milliamperes (mA)
The filament is commonly made of _____.
Tungsten
The Anode is commonly made of ____.
Tungsten
The energy of the x-rays produced at the anode is a function of how ____ the electrons strike.
Fast
X-rays form by …
Colliding electrons with target atoms.
Bremsstrahlung
Radiative interactions are the main source of diagnostic x-rays
Slowing or breaking of the electron as it passes by the atom allows it to release energy in the form of x-rays
