RTE 1401 Final Exam Keiser University-Ft Lauderdale | UPDATED
Questions with 100% Verified Answers
Question:
Fixed mAs/ variable kVp chart
Answer:
adjust kVp by multiplying by 2 (+/-) for every increment of
ONE centimeter or inch of size difference
Question:
Fixed KVP/ variable mAs chart
Answer:
adjust mAs by multiplying (+) by 2 for every 4-5 centimeter
or inch size difference
Question:
digital image quality factors
Answer:
brightness, contrast resolution, spatial resolution, distortion
exposure indicator, noise
Question:
brightness
Answer:
intensity of light coming through monitor
Question:
contrast resolution
Answer:
how well a system can display varying shades of gray
-affected by dynamic range
Question:
pixel depth
, Answer:
determines the number of shades of gray that can be
displayed: 2 to the 14th power= 16,384 shades of gray
Question:
spatial resolution
Answer:
measured in Lp/ mm
-2.5- 5 Lp/mm in digital imaging
Question:
distortion
Answer:
size & shape effected by SID, OID, and alignment
Question:
exposure indicator
Answer:
number displayed on the processed image to indicate the level
of x-ray exposure received to the digital image receptor.
-red, yellow or green
Question:
noise
Answer:
random disturbance that reduces of obscures image clarity
-SNR and quantum noise
Question:
Signal to Noise Ratio (SNR)
Answer:
The ratio of the speech signal (intended signal) to that of the
background noise
,-HIGH is ALWAYS best
Question:
quantum noise
Answer:
lack of sufficient data (photons) - results in blotchy or mottled
image. Increase mAs to fix
Question:
algorithms
Answer:
complex math equations used to maintain image quality
Question:
Dynamic range
Answer:
range of shades a digital system is capable of displaying as
seen by the human eye
Question:
exposure latitude
Answer:
the range of exposures that can be used and still result in the
capture of a diagnostic- quality image
-DR has more than film-screen imaging
Question:
scotopic vision
Answer:
night vision; uses rods of retina which are peripherally located
Question:
photopic vision
, Answer:
daylight vision; uses cones, centrally located
Question:
Image Intensifier
Answer:
an electronic vacuum tube that converts beam of light to
electrons, then back to light, increasing the light intensity in
the process
-brightens image up to 5,000 times brighter than conventional
floural
-5 principal parts
Question:
5 principal parts of Image Intensifier
Answer:
input phosphor screen, photocathode, electrostatic focusing
lenses, accelerating anode*, output phosphor screen
Question:
Dead man's switch
Answer:
apply positive pressure to switch (not constant power)
Question:
input phosphor screen
Answer:
a 6"- 23" screen bonded to the curved surface of the
flourscopy tube
-made of cesium iodide which acts as a scintillator
-converts XR to light
-curved to maintain distance to focal point
Questions with 100% Verified Answers
Question:
Fixed mAs/ variable kVp chart
Answer:
adjust kVp by multiplying by 2 (+/-) for every increment of
ONE centimeter or inch of size difference
Question:
Fixed KVP/ variable mAs chart
Answer:
adjust mAs by multiplying (+) by 2 for every 4-5 centimeter
or inch size difference
Question:
digital image quality factors
Answer:
brightness, contrast resolution, spatial resolution, distortion
exposure indicator, noise
Question:
brightness
Answer:
intensity of light coming through monitor
Question:
contrast resolution
Answer:
how well a system can display varying shades of gray
-affected by dynamic range
Question:
pixel depth
, Answer:
determines the number of shades of gray that can be
displayed: 2 to the 14th power= 16,384 shades of gray
Question:
spatial resolution
Answer:
measured in Lp/ mm
-2.5- 5 Lp/mm in digital imaging
Question:
distortion
Answer:
size & shape effected by SID, OID, and alignment
Question:
exposure indicator
Answer:
number displayed on the processed image to indicate the level
of x-ray exposure received to the digital image receptor.
-red, yellow or green
Question:
noise
Answer:
random disturbance that reduces of obscures image clarity
-SNR and quantum noise
Question:
Signal to Noise Ratio (SNR)
Answer:
The ratio of the speech signal (intended signal) to that of the
background noise
,-HIGH is ALWAYS best
Question:
quantum noise
Answer:
lack of sufficient data (photons) - results in blotchy or mottled
image. Increase mAs to fix
Question:
algorithms
Answer:
complex math equations used to maintain image quality
Question:
Dynamic range
Answer:
range of shades a digital system is capable of displaying as
seen by the human eye
Question:
exposure latitude
Answer:
the range of exposures that can be used and still result in the
capture of a diagnostic- quality image
-DR has more than film-screen imaging
Question:
scotopic vision
Answer:
night vision; uses rods of retina which are peripherally located
Question:
photopic vision
, Answer:
daylight vision; uses cones, centrally located
Question:
Image Intensifier
Answer:
an electronic vacuum tube that converts beam of light to
electrons, then back to light, increasing the light intensity in
the process
-brightens image up to 5,000 times brighter than conventional
floural
-5 principal parts
Question:
5 principal parts of Image Intensifier
Answer:
input phosphor screen, photocathode, electrostatic focusing
lenses, accelerating anode*, output phosphor screen
Question:
Dead man's switch
Answer:
apply positive pressure to switch (not constant power)
Question:
input phosphor screen
Answer:
a 6"- 23" screen bonded to the curved surface of the
flourscopy tube
-made of cesium iodide which acts as a scintillator
-converts XR to light
-curved to maintain distance to focal point
