Part III Flashcards
Radon comes to use in which form?
Radon
Give or take a little, naturall background radiation accounts for about how much of our average exposure to ionizing radiation?
80%
The beneficial effects of radiation is called….
Radiation hormesis
Which of the folowing is a property of xray?
They are not stored in matter, they penetrate matter, they cause biological effects, they cause ionization
How many rads are in a gray?
100
Which unit of measurement is usually used for reporting occupational exposure to radiation?
REM
In what year did BJ Palmer introduce xray into chiropractic?
1910
The focal spot size is usually set in conjunction with which of the following?
Higher voltage circuit
Which would happen if you lengthened the time of an exposure?
You would increase the number error of photons hitting the patient
Which priMary factor is responsible for the quality of an xray beam?
mA
The mA setting determine especially which of the following?
The current flowing through the filament
Which would have the least fluctuation in the kV level?
High frequency
What propels the electrons in an xray tube?
kV
A tube warm up procedure should be performed by using how many exposures?
2
Which part of an xray is target located in?
Anode
The term theromionic emmission is most closely related to which of the following?
Cloud of the electrons at the filament
Which of the following is true about a dual focus tube?
2 filaments
The purpose of the collimator after shutters is to….?
Absorb unneeded xrays
Which of the following three radiographic projections routinely uses compenesting filtration?
AP thoracic, lateral thiracic, full spine
Which is the best way to identify a patient’s film?
Flash on label before processing
When is a fetus the most sensitive to radiation?
1st trimester
Of the choices listed below, which two are the most susceptible to develop a malignancycle from ionizing radiation?
Bonet marrow and breasts
You notice a film you took is darker and the cervical spine is larger than the one you took 3 months ago. What did you do?
Took the film at 40” rather than at 72”
