Exam #2- Word Doc (4) Flashcards
(28 cards)
If you compared the two radiographs of a cervical spine with one having been taken at 40” and the other at 72” with the appropriate change in the radiographic technique, what would you find?
a. On the 40” film the image will be larger and clearer
b. On the 40” film the image will be smaller and less clear
c. On the 72” film the image will be smaller and clear
d. On the 72” film the image will be larger and less clear
On the 72” film the image will be smaller and clear
Which of the following will ABSORB the most x-rays?
a. bone
b. soft tissue
c. CT
d. organs
bone
absorbs all or most
Let’s say that you practice in Dwarf, Kentucky and in comes a short little guy dressed in green named Mr. H Swagelle. During your conciliation you find out that he has cervical complaints and he tells you to fix it and that money is no object since he is the illegitimate son of a billionaire in New York. When looking at his cervical films you noice that one said of them is lighter than the other. What should you suspect is the cause of this appearance?
your focused grid has been installed backwards
Your dear friend who practices in Tie Plant, Mississippi calls you for some advice. He/she says that they have x-rayed the cervical of a patient and the lateral film is too light but all the structures show up. You asked what the factors are and your friend said they used 50 kV at 10 mAs at 72” source image distance using a 400 speed screen. So you struggle around trying to find your Rad 3 notes (which your friend had sold as soon as they got out of the course). You look up the information in your notes and come up with which best solution?
increase the kV by 15%
** Which of the following is most closely related to “DIFFERENTIAL ABSORPTION”?
a. contrast
b. density
c. size
d. blurriness
contrast
Which of the following is the primary factor for radiographic DENSITY?
a. kV
b. mAs
c. tube distance
d. grid
mAs
With which of the following percentages in mAs would you expect to see the slightest change in radiographic density?
a. 15%
b. 30%
c. 50%
d. 100%
30%
The use of a GRID has which main effect on the patient?
a. it increases x-ray exposure to the patient
b. it reduces patient motion
c. it reduces x-ray exposure to the patient
d. it more evenly disburses the patient soft tissue
it increases x-ray exposure to the patient
The HIGHER the kVp the more _________ radiation is produced?
a. compton
b. classical
c. characteristic
d. photoelectric
compton
scatter
What is an ADVANTAGE of HIGH kVp technique?
a. less film fog
b. less latitude
c. increased detail
d. decreased motion
e. lowered patient radiation dose
lowered patient radiation dose
mAs increased patient radiation
Which of the following would you do if you were going to use the 30% rule?
a. alter the mAs by 30%
b. alter the kV by 30%
c. alter the kV by 15% and the mAs by 15%
d. alter the kV by 10% and the mAs by 5%
alter the mAs by 30%
An AIR GAP technique has which affect?
reduces the amount of scatter to the film
GRID NOT needed
When going from a GRID to a NON-GRID technique on the same body part, with the same FFD, kVp and mAs would cause which of the following?
the film would be darker
Which of the following is recommended for use of a stationary grid in spinal radiography?
slightly more than 100 lines per inch
100-103
Of the following, which is in the range of body part thickness when a grid should first be considered advantageous to use?
a. 2 cm
b. 12 cm
c. 20 cm
d. 25 cm
12 cm
10-15 cm thick
Which of the following is TRUE about GRIDS?
a. they increase patient radiation
b. they should be used with smaller body parts
c. they should not be used with films of the pelvis
d. they work best if the lead strips are parallel
they increase patient radiation
If you were re-x-raying an obese patient because your first film was too light but you could see the osseous structures, which of the following would be the best thing to do in order to get the best quality radiograph?
a. increase the exposure time
b. increase the kV
c. increase the mAs
d. increase the FFD
increase the mAs
Which would ABSORB the most x-rays in a patient?
a. lungs
b. heart
c. vertebrae
d. trachea
e. aorta
vertebrae
bone
** Which of the following is most closely related to “DIFFERENTIAL ABSORPTION”?
a. subject contrast
b. film density
c. remnant radiation
d. scatter radiation
subject CONTRAST
Determine which radiographic technique would yield a LONGEST scale of contrast
a. 85 kV and 30 mAs
b. 95 kV and 10 mAs
c. 70 kV and 40 mAs
d. 80 kV and 20 mAs
95 kV and 10 mAs
long scale = LOW mAS, HIGH kV
If you had a film that was OVER-EXPOSED (dark), but you could see the image, which of the following would improve your film?
a. increasing the kV by 15%
b. increasing the mAs by 50%
c. decreasing the mAs by 50%
d. decreasing the mAs and increasing the kV by 15%
decreasing the mAs by 50%
OR decrease the kV by 15%
Which of the following would produce the same film density as 200 mA for 0.5 sec?
a. 300 mA for 1.5 sec
b. 150 mA for 3/4 of a second
c. 150 mA for 2 sec
d. 100 mA for 1 sec
100 mA for 1 sec
If you took a retake and REDUCED the kVp by 15% and INCREASED the mAs by adding 30%, how would the second film look compared to the first?
a. the second film would be lighter than the first
b. the second film would have less contrast than the first
c. the second film would be the same contrast as the first
d. the second film would be darker than the first
the second film would be lighter than the first
Short scale/high contrast
Generally speaking, adding 4 kVp to a radiographic technique with a single phase machine would be the equivalent to which of the following?
a. increasing the mAs by 50%
b. increasing the mAs by 30%
c. increasing the mAs by 15%
d. increasing the mAs by 60%
increasing the mAs by 30%
