Final Exam Flashcards
What’s every technologists obligation?
To ensure that the radiation dose to both patient and other healthcare professionals is kept ascots reasonably achievable (ALARA)
What are the 3 most effective ways to protect patients from ionizing radiation?
- time: minimize radiation beam on time
- distance: maximize distance from radiation source of both patients and staff
- Shielding: use shielding on staff and patients
What measures the amount ionization created in air by X-rays, what are the units?
Exposure (C/Kg coulomb per kilogram or R rotengen)
What does measurement of exposure usually indicate? (now using air karma to find)
X-ray tube output, patient entrance exposure, scattered radiation levels
What indicates the amount of energy transferred to a mass of air by the photons and replaced exposure as preferred quantity? What are the units?
Air karma (Gy gray or rad)
What is the amount of energy deposited per unit mass by the interactions of ionizing radiation with tissue? What are the units?
Absorbed dose (Gy or rad)
What quantifies the risk for different types of radiation using the same relative scale? What are the units?
Equivalent dose (Sv sieverts or rem)
What indicates the risk from a partial body exposure by multiplying the equivalent dose by the tissue-weighting factor that corresponds to the area of the body that is exposed? What are the units?
Effective does (Sv or rem)
Traditional units
Roentgen (R)
Rad
Rem
SI Units
C/kg
Gray (Gy)
Sievert (Sv)
What is the annual dose limit for occupationally exposed workers?
50 mSv
Individuals younger than ____ years of age should not be employed when dealing with radiation regularly.
18
What should you always wear?
Personnel monitoring device
What are compression bands, sponges, sandbags, tape, etc. called?
Mechanical holding devices
Who should hold a patient if needed?
Family member or someone not exposed to radiology occupationally wearing apron and gloves
