Patient Care Review Questions Flashcards
Ch. 1, 2, 3, 5, 6, 7, 8, 9, 10, 12, and 17 (113 cards)
X-rays were discovered in 1895 in:
A. the United States
B. England
C. Germany
D. China
c. Germany
The inventor of the hot cathode x-ray tube was:
A. Crookes
B. Roentgen
C. Coolidge
D. Edison
C. Coolidge
The majority of radiography education programs are based in/on:
A. colleges
B. clinics
C. hospitals
D. the Internet
A. colleges
A cassette containing a photostimulable phosphor plate is one form of:
A. fluoroscope
B. image receptor
C. grid device
D. transformer
B. image receptor
Which of the following is not a basic requirement for the production of x-rays?
A. A vacuum
B. A source of electrons
C. A photostimulable phosphor
D. A target
c. a photostimulable phosphor
When fast-moving electrons collide with the target of an x-ray tube, the kinetic energy of their motion is converted into x-rays and:
A. a space charge
B. heat
C. potential difference (voltage)
D. scatter radiation
b. heat
Of the following types of electromagnetic energy, which has the shortest wavelength?
A. Radio waves
B. Gamma rays
C. Microwaves
D. Ultraviolet light
b. gamma rays
Which of the following is not an accurate statement regarding the characteristics of x-rays?
A. They can penetrate matter that is impenetrable to light.
B. They can be refracted by a lens.
C. They have an exposure effect on photographic emulsions.
D. They cannot be detected by the human senses.
b. they can be refracted by a lens
The characteristic most often used to describe the energy of an x-ray beam is its:
A. velocity
B. space charge
C. wavelength
D. amplitude
c. wavelength
An x-ray beam that has been attenuated by matter is called:
A. remnant radiation
B. primary radiation
C. secondary radiation
D. scatter radiation
a. remnant radiation
A device used to indicate the location of the radiation field and to control its size is called a:
A. grid
B. collimator
C. transformer
D. control console
b. collimator
An x-ray machine that permits viewing of the x-ray image in motion in real time is called a:
A. control console
B. fluoroscope
C. collimator
D. bucky
b. fluoroscope
The four prime factors of radiographic exposure are exposure time, milliamperage, kilovoltage, and:
A. optical density
B. source-image distance
C. object-image distance
D. image detail
b. source-image distance
The prime factor that controls the wavelength of the x-ray beam is:
A. milliamperage
B. exposure time
C. kilovoltage
D. object-image distance
c. kilovoltage
The prime factor that controls the rate at which x-rays are produced is:
A. exposure time
B. kilovoltage
C. milliampere-seconds
D. milliamperage
d. milliamperage
The mAs value of an exposure is varied to provide control of:
A. radiation intensity
B. image contrast
C. image detail
D. radiographic distortion
a. radiation intensity
The imaging system that provides an instantaneous digital image on a monitor is called:
A. digital radiography
B. computed radiography
C. film-screen radiography
D. anatomic programming
a. digital radiography
The hardware and software for managing digital images is called:
A. PACS
B. CR
C. DR
D. AEC
a. PACS
Which of the following factors is not affected by a change in the mA setting?
A. optical density
B. anode heat
C. object-image distance
D. radiation intensity
c. object-image distance
Which of the following factors is used to control image contrast?
A. mA
B. SID
C. OID
D. kVp
d. kvp
The inverse square law states that radiation intensity is inversely proportional to the square of the:
A. mA
B. SID
C. T
D. kVp
b. SID
A variation in the size or shape of the image in comparison to the object it represents is called:
A. distortion
B. image contrast
C. definition
D. optical density
a. distortion
The product of dose in grays times the WR is equal to the equivalent dose, which in the SI system is measured in units called:
A. rem
B. roentgens
C. rad
D. sieverts
d. sieverts
One centigray (cGy) is equal to:
A. 100 rad
B. 100 Sv
C. 1 rad
D. 1 R
c. 1 rad