Attenuation:
a. is radiation that emerges from the patient
b. describes changes in the x-ray beam as it travels through the patient
c. produces only scatter radiation
d. occurs only at doses used in radiation therapy correct answers Describes changes in the x-ray beam as it travels through th...
a. is radiation that emerges from the patient
b. describes changes in the x-ray beam as it travels through the patient
c. produces only scatter radiation
d. occurs only at doses used in radiation therapy correct answers Describes changes in the x-
ray beam as it travels through the patient
Which photon-tissue interaction makes radiography possible because of its creation of image
contrast?
a. Compton
b. Coherent
c. Photoelectric
d. Pair production correct answers Photoelectric
Which photon-tissue interaction produces radiation that may expose others in the room
during fluoroscopy?
a. Compton
b. Coherent
c. Photoelectric
d. Pair production correct answers Compton
The SI unit of absorbed dose:
a. Coulombs/kilogram
b. Gray
c. Curie
d. Rad correct answers Gray
The SI unit of radioactivity:
a. Becqueral
b. Rem
c. Quality factor
d. Curie correct answers Becqueral
Measurement of positive and negative particles created when radiation ionizes atoms in the
air:
a. Becquerel
b. Sievert
c. Roentgen
d. Curie correct answers Roentgen
,Linear energy transfer:
a. is the same for all types of radiation
b. is the same for wave and particulate radiations used in diagnosis and treatment
c. occurs only during x-ray procedures
d. varies for different types of radiation correct answers Varies for different types of radiation
The unit of the curie would be used in what imaging modality?
a. Radiography
b. CT
c. MRI
d. Nuclear Medicine correct answers Nuclear Medicine
The smallest particle of an element that retains the characteristics of the element:
a. compound
b. atom
c. molecule
d. neutron correct answers Atom
Atomic mass refers to:
a. the number of protons plus the number of neutrons
b. the number of electrons plus the number of protons
c. the number of electrons plus the number of neutrons
d. the number of protons correct answers Number of protons plus number of neutrons
X-rays travel as a bundles of energy called:
a. protons
b. phasers
c. particles
d. photons correct answers Photons
The height of a sine wave:
a. wavelength
b. altitude
c. amplitude
d. frequency correct answers Amplitude
The number of x-ray waves passing a given point per unit of time:
a. wavelength
b. altitude
c. amplitude
d. frequency correct answers Frequency
, In digital fluoroscopy, the image should be viewed on what device to take advantage of the
digital capabilities?
a. digital view box
b. high-resolution monitor
c. high-definition TV
d. plasma TV correct answers High-resolution monitor
A primary advantage of digital fluoroscopy:
a. postprocessing manipulation of the image
b. no radiation dose to the patient
c. no fluoroscopist required
d. lower cost correct answers Postprocessing manipulation of the image
Which of the following anatomical parts is NOT related to the others?
a. Symphysis pubis
b. Ischial spine
c. Iliac crest
d. Ileum correct answers Ileum
At what level is the image receptor centered for a lateral lumbosacral spine?
a. ASIS
b. Symphysis pubis
c. Iliac crest
d. First lumbar correct answers Iliac crest
In digital fluoroscopy and computed radiography, the energy must be changed to digital form
by a(n):
a. digital-to-analog converter
b. flux-capacitor
c. analog-to-digital converter
d. DVD-ROM correct answers Analog-to-digital converter
An algorithm is:
a. a mathematical hypothesis used in imaging
b. a mathematical formula used to reconstruct the image in digital imaging
c. an advanced imaging procedure
d. the mathematical basis for film-screen imaging correct answers A mathematical formula
used to reconstruct the image in digital imaging
In computed radiography, each pixel corresponds to a shade of gray representing an area in
the patient known as a(n):
a. pathology
b. density
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