Multiple choice Flashcards
- Which statement is false?
a. The generator determines the capacity of the x-ray machine.
b. Greater capacity allows shorter exposure time.
c. Reduction of the exposure time will increase the motion unsharpness
d. The most common reason for motion unsharpness is panting.
c. Reduction of the exposure time will increase the motion unsharpness
- What is the role of the collimator?
a. Filtration of the scattered beams
b. Setting the size of the x-ray beam
c. Setting the strength of the x-ray beam
d. Reduction of x-ray radiation
b. Setting the size of the x-ray beam
- Which one is not an exposure factor?
a. kV
b. mA
c. kW
d. s
c. kW
- Which statement is false?
a. The kVp describes the strength (penetrating power) of the x-ray beam.
b. The mA describes the number of x-ray photons
c. To maintaine the same exposure, if increasing the mAs you have to elevate the kVp too.
d. The same mAs can be created from different time components.
c. To maintaine the same exposure, if increasing the mAs you have to elevate the kVp too.
- What is the normal range of tube voltage in small animal radiography?
a. 0,1-2 kVp
b. 1000-2000 kVp
c. 40-100 kVp
d. 4-10 kVp
c. 40-100 kVp
- Which statement is true? The use of the grid
a. reduces the radiation exposure
b. improves the image contrast
c. improves the image sharpness
d. reduces the exposure time
b. improves the image contrast
- What is not a normal component of an indirect digital system (CR)?
a. x-ray tube
b. x-ray film
c. collimator
d. PSP plate
b. x-ray film
- Which statement is false?
a. The x-ray radiation is electromagnetic radiation.
b. X-ray beams cannot be deflected by a magnetic field.
c. Particles with higher energy have a higher penetrating power.
d. The elementary unit of the x-ray beam is the electron.
d. The elementary unit of the x-ray beam is the electron.
- Which statement is true?
a. Some digital technologies use x-ray films.
b. Fluoroscopy can be digital or analog.
c. DR systems can be digital or analog.
d. The picture of CR systems can be static or dynamic.
b. Fluoroscopy can be digital or analog.
- Which statement is true ?
a. Fluoroscopy causes very low radiation exposure.
b. Fluoroscopy is mainly used for static examinations.
c. During fluoroscopy the x-ray tube is generally above the animal.
d. Fluoroscope is also called “C-arm”.
.
d. Fluoroscope is also called “C-arm”.
- The negatively charged particle of an atom is the:
a. proton.
b. neutron.
c. electron.
d. nucleus
c. electron.
- As x-rays pass through materials, they have the ability to:
a. cause some substances to fluoresce (emit visible light).
b. completely remove an electron from an atom, leaving the atom positively charged.
c. cause chemical changes that can kill cells.
d. all of the above.
d. all of the above.
- Which of the following statements is true?
a. X-rays can be deflected by magnetic fields.
b. X-rays with longer wavelengths penetrate farther than rays with shorter wavelengths.
c. Electromagnetic radiation with higher frequency has more penetrating power through space and matter.
d. Gamma rays are required for the production of a radiograph.
c. Electromagnetic radiation with higher frequency has more penetrating power through space and matter.
- Electrons travel:
a. Toward the cathode in an x-ray tube
b. Away from the anode in an x-ray tube
c. Toward the anode in an x-ray tube
d. None of them is true
c. Toward the anode in an x-ray tube
- X-ray photons travel:
a. toward the cathode in an x-ray tube.
b. away from the anode in an x-ray tube.
c. toward the anode in an x-ray tube.
d. None of them is true.
b. away from the anode in an x-ray tube.
- Ways to increase penetrating power of x-rays include:
a. increasing kVp.
b. increasing the time setting.
c. increasing thermionic emission.
d. increasing mAs.
a. increasing kVp.
- The milliamperage-seconds (mAs) for 100 mA and 1/10 sec is:
a. 10 mAs
b. 10000 mAs
c. 100 mAs
d. 1 mAs
a. 10 mAs
- According to Santes’ rule, if a cats abdomen measures 8 cm, FFD is 100 cm, kVp is:
a. 72
b. 56
c. 66
d. 52
b. 56
- Increasing the film-object distance:
a. The resulting image will be larger.
b. The resulting image will be sharper.
c. The resulting image will be distorted.
d. Both a and b is correct.
a. The resulting image will be larger.
- One percent of the energy produced at the anode is in the form of
a. heat
b. x-rays
c. light
d. none of the above.
b. x-rays
- The temperature of the filament within the cathode is controlled by:
a. time setting.
b. the source-image distance.
c. kVp setting.
d. mA setting.
d. mA setting.
- Which is a characteristic of x-rays?
a. Their total number produced is determined by kV
b. Longer wavelengths have more penetrating power.
c. Their intensity increases as SID (source-image distance) decreases.
d. They diverge from a light source.
c. Their intensity increases as SID (source-image distance) decreases.
- The potential difference between the anode and cathode is measured in
a. kilovolts
b. kilowatts
c. milliamperes
d. centimeters
a. kilovolts
- Higher kVp settings allows for a ___ mAs and ___exposure time.
a. higher, higher
b. higher, lower
c. lower, lower
d. higher, higher
c. lower, lower
- Which of the following increases radiographic density?
a. thinner body parts
b. increased mAs
c. increased density of the bodypart being radiographed
d. decreased kVp
a. thinner body parts
- Which of the following radiographs should have the shortest scale of contrast?
a. abdomen
b. thorax
c. femur
d. all are approximately equal
b. thorax
- The primary exposure factor that controls scatter radiation is
a. kVp
b. mAs
c. increased exposure time
d. the collimator setting
d. the collimator setting
- What do grids contain that controls scatter radiation?
a. Molybdenum
b. Aluminium
c. Silver
d. Lead
d. Lead
- Where is a grid located?
a. between the patient and the cassette
b. between the patient and the x-ray tube
c. above the x-ray tube
d. under the cassette
a. between the patient and the cassette
- To prevent magnification and distortion of the object being radiographed, the patient must …
a. be as parallel to the film as possible
b. be as close to the film as possible
c. be as close to the x-ray tube as possible
d. both a and b are correct
d. both a and b are correct
- When viewing a radiograph over laterally positioned animal
a. the head should be at the top of the viewbox /display
b. the head should face the viewer’s left with this spine at the top
c. they had shoot face with the viewer’s right with the spine at the top
d. the head should face the viewer’s left with the spine at the bottom
b. the head should face the viewer’s left with this spine at the top
34. Any body part exceeding this measurement requires the use of a grid to reduce fog producing scatter radiation a. 20 cm b. 10 cm c. 2.5 cm d. 30 cm
b. 10 cm
- Which statement is false?
a. The use of grid is recommended over 10 cm object diameter.
b. Using a grid, the dose of the radiation should be reduced
c. The grid filters the scatter radiation
d. The grid contains small lead strips standing vertically or in an angle facing toward the x-ray tube.
b. Using a grid, the dose of the radiation should be reduced
- Which statement is false? The scattered beam
a. is negligible concerning radiation safety of the staff
b. originates mostly from the patient’s body
c. is disadvantageous concerning the quality of the radiograph
d. is less intense than the primary beam
a. is negligible concerning radiation safety of the staff
- Which statement is false? The x-ray beam is
a. invisible
b. makes chemical changes in photoemulsions
c. produces light flash in fluorescent materials
d. penetrates bodies without losing energy
d. penetrates bodies without losing energy
- Which one does not belong to the basic radiographic opacities
a. metal
b. wood
c. stone
d. gas
b. wood
- With the use of a grid we can
a. reduce the radiation exposure
b. improve the image contrast
c. improve the image sharpness
d. reduce the exposure time
b. improve the image contrast
- Which statement is incorrect? The x-ray (is)…
a. ionizing radiation.
b. electromagnetic radiation.
c. travels at the speed of light.
d. consists of charged particles.
d. consists of charged particles.
- What is not a normal component in the digital radiographic technology?
a. x-ray tube
b. intensifying screen
c. grid
d. collimator
b. intensifying screen
- The attenuation of the X-ray beam does not depend on which parameter?
a. atomic number
b. object thickness
c. physical density
d. optical density
d. optical density
- Which components are different in conventional and digital radiography?
a. x-ray tube
b. generator
c. grid
d. detector
d. detector
- What is the main source of the radiation exposure of the personnel ?
a. leaking radiation from the x-ray tube
b. the primary beam
c. the secondary beam originating from the patient
d. none of them
c. the secondary beam originating from the patient