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RTE 1401 Final Exam With Questions And 100% ALL DETAILED CORRECT ANSWERS
Terms in this set (345)
adjust kVp by multiplying by 2 (+/-) for every increment of ONE centimeter or inch of size
Fixed mAs/ variable kVp chart
difference
Fixed KVP/ variable mAs chart adjust mAs by multiplying (+) by 2 for every 4-5 centimeter or inch size difference
digital image quality factors brightness, contrast resolution, spatial resolution, distortion exposure indicator, noise
brightness intensity of light coming through monitor
how well a system can display varying shades of gray
contrast resolution
-affected by dynamic range
determines the number of shades of gray that can be displayed: 2 to the 14th power= 16,384
pixel depth
shades of gray
measured in Lp/ mm
spatial resolution
-2.5- 5 Lp/mm in digital imaging
size & shape
RTE 1401 Final Exam
number displayed on the processed image to indicate the level of x-ray exposure received to the
exposure indicator digital image receptor.
distortion -red, yellow or green
effected by SID, OID, and alignment
1/8
, random disturbance that reduces of obscures image clarity
noise
-SNR and quantum noise
The ratio of the speech signal (intended signal) to that of the background noise
Signal to Noise Ratio (SNR)
-HIGH is ALWAYS best
quantum noise lack of sufficient data (photons) - results in blotchy or mottled image. Increase mAs to fix
algorithms complex math equations used to maintain image quality
Dynamic range range of shades a digital system is capable of displaying as seen by the human eye
the range of exposures that can be used and still result in the capture of a diagnostic-quality
exposure latitude image
-DR has more than film-screen imaging
scotopic vision night vision; uses rods of retina which are peripherally located
photopic vision daylight vision; uses cones, centrally located
an electronic vacuum tube that converts beam of light to electrons, then back to light, increasing
the light intensity in the process
Image Intensifier
-brightens image up to 5,000 times brighter than conventional floural
-5 principal parts
input phosphor screen, photocathode, electrostatic focusing lenses, accelerating anode*, output
5 principal parts of Image Intensifier
phosphor screen
Dead man's switch apply positive pressure to switch (not constant power)
a 6"- 23" screen bonded to the curved surface of the flourscopy tube
-made of cesium iodide which acts as a scintillator
input phosphor screen
-converts XR to light
-curved to maintain distance to focal point
emits e- when stimulated by light in a process called photoemission due to it being made of
photocathode cesium and antimony compounds
-bonded directly to input phospher
RTE 1401 Final Exam
2/8
RTE 1401 Final Exam With Questions And 100% ALL DETAILED CORRECT ANSWERS
Terms in this set (345)
adjust kVp by multiplying by 2 (+/-) for every increment of ONE centimeter or inch of size
Fixed mAs/ variable kVp chart
difference
Fixed KVP/ variable mAs chart adjust mAs by multiplying (+) by 2 for every 4-5 centimeter or inch size difference
digital image quality factors brightness, contrast resolution, spatial resolution, distortion exposure indicator, noise
brightness intensity of light coming through monitor
how well a system can display varying shades of gray
contrast resolution
-affected by dynamic range
determines the number of shades of gray that can be displayed: 2 to the 14th power= 16,384
pixel depth
shades of gray
measured in Lp/ mm
spatial resolution
-2.5- 5 Lp/mm in digital imaging
size & shape
RTE 1401 Final Exam
number displayed on the processed image to indicate the level of x-ray exposure received to the
exposure indicator digital image receptor.
distortion -red, yellow or green
effected by SID, OID, and alignment
1/8
, random disturbance that reduces of obscures image clarity
noise
-SNR and quantum noise
The ratio of the speech signal (intended signal) to that of the background noise
Signal to Noise Ratio (SNR)
-HIGH is ALWAYS best
quantum noise lack of sufficient data (photons) - results in blotchy or mottled image. Increase mAs to fix
algorithms complex math equations used to maintain image quality
Dynamic range range of shades a digital system is capable of displaying as seen by the human eye
the range of exposures that can be used and still result in the capture of a diagnostic-quality
exposure latitude image
-DR has more than film-screen imaging
scotopic vision night vision; uses rods of retina which are peripherally located
photopic vision daylight vision; uses cones, centrally located
an electronic vacuum tube that converts beam of light to electrons, then back to light, increasing
the light intensity in the process
Image Intensifier
-brightens image up to 5,000 times brighter than conventional floural
-5 principal parts
input phosphor screen, photocathode, electrostatic focusing lenses, accelerating anode*, output
5 principal parts of Image Intensifier
phosphor screen
Dead man's switch apply positive pressure to switch (not constant power)
a 6"- 23" screen bonded to the curved surface of the flourscopy tube
-made of cesium iodide which acts as a scintillator
input phosphor screen
-converts XR to light
-curved to maintain distance to focal point
emits e- when stimulated by light in a process called photoemission due to it being made of
photocathode cesium and antimony compounds
-bonded directly to input phospher
RTE 1401 Final Exam
2/8
