old test questions Flashcards
Which effect would reducing FFd have?
the number of x-rays reaching the film increases
if you wanted to produce more x-rays, which of he following would you do?
increase the MA
added filtration is a term used for which of the following?
filtration that is between the port and collimator
the dude stand should only be moved after what has occurred?
the lock has been released
how much lead equivalency do most shielding devices have in the?
.5 mm
man who is an 84 year old with low back pain. You have decided to radiograph his lumbar spine and pelvis and offer him a gonad shield which he refuses. After you look at the films, you realize that both the A-P and lateral need to retaken and so you proceed. Considering the extra exposure what part of this mans body was exposed to the most radiation?
his sagging, wrinkled skin
Thermionic emission has to do with…
a filament
Which contributes to the most MAN MADE radiation in a humans annual exposure?
diagnostic X-rays
if you had a film that was too dark, which of the following would solve your problem?
decrease the MAs
what limits the size od useful x-ray beam?
collimator
Your thoracic spine x-ray on a 7”X17” is fine except the upper region is way too dar. what happened?
didnt filter the upper part?
what is penumbra?
blurry/unclear spot
which part of the a tube prevents the electron cloud from dispensing beyond its desired location
the focusing cup
what filtration of the the x-ray bean as it passes through the collimator is mostly due to?
the shutters
the single greatest risk for a fetus from ionizing radiation exposure from x-ray is?
childhood leukemia and mutations
if you took a radiograph at 72 and then at 40, what would you have to do to maintain the same radiographic intensity?
decrease MAs by 1/3
What does the P in KvP stand for?
Peak?
what type of collimator do people prefer today?
manuel collimator
what amount of the radiograph is given off as heat?
99%
which of the following travels at less than the speed of light?
radon
alpha particles are most harmful in people when they do what with them?
inhale them
what connects the transformer with the tube?
the cables
if you looked into the port of a used X-ray tube and saw that the entire surface of the anode had bumps, which of the following terms describes the appearance?
anode pitting
what is the most common reason that compensating filtration is used?
the reduce film density
the mA setting determines
the current going through the filament
minus sign is too…? and plus sign is too…?
dark…light
