RTE 1401 EXAM SCRIPT TESTED QUESTIONS
FULL SOLUTION PREMIUM STUDY
MATERIAL
●● Fixed KVP/ variable mAs chart
Answer: adjust mAs by multiplying (+) by 2 for every 4-5 centimeter or
inch size difference
●● digital image quality factors
Answer: brightness, contrast resolution, spatial resolution, distortion
exposure indicator, noise
●● brightness
Answer: intensity of light coming through monitor
●● contrast resolution
Answer: how well a system can display varying shades of gray
-affected by dynamic range
●● pixel depth
Answer: determines the number of shades of gray that can be displayed:
2 to the 14th power= 16,384 shades of gray
,●● spatial resolution
Answer: measured in Lp/ mm
-2.5- 5 Lp/mm in digital imaging
●● distortion
Answer: size & shape
effected by SID, OID, and alignment
●● 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
●● noise
Answer: random disturbance that reduces of obscures image clarity
-SNR and quantum noise
●● Signal to Noise Ratio (SNR)
Answer: The ratio of the speech signal (intended signal) to that of the
background noise
-HIGH is ALWAYS best
,●● quantum noise
Answer: lack of sufficient data (photons) - results in blotchy or mottled
image. Increase mAs to fix
●● algorithms
Answer: complex math equations used to maintain image quality
●● Dynamic range
Answer: range of shades a digital system is capable of displaying as seen
by the human eye
●● 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
●● scotopic vision
Answer: night vision; uses rods of retina which are peripherally located
●● photopic vision
Answer: daylight vision; uses cones, centrally located
●● 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
●● 5 principal parts of Image Intensifier
Answer: input phosphor screen, photocathode, electrostatic focusing
lenses, accelerating anode*, output phosphor screen
●● Dead man's switch
Answer: apply positive pressure to switch (not constant power)
●● 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
●● photocathode
Answer: emits e- when stimulated by light in a process called
photoemission due to it being made of cesium and antimony compounds
-bonded directly to input phospher
FULL SOLUTION PREMIUM STUDY
MATERIAL
●● Fixed KVP/ variable mAs chart
Answer: adjust mAs by multiplying (+) by 2 for every 4-5 centimeter or
inch size difference
●● digital image quality factors
Answer: brightness, contrast resolution, spatial resolution, distortion
exposure indicator, noise
●● brightness
Answer: intensity of light coming through monitor
●● contrast resolution
Answer: how well a system can display varying shades of gray
-affected by dynamic range
●● pixel depth
Answer: determines the number of shades of gray that can be displayed:
2 to the 14th power= 16,384 shades of gray
,●● spatial resolution
Answer: measured in Lp/ mm
-2.5- 5 Lp/mm in digital imaging
●● distortion
Answer: size & shape
effected by SID, OID, and alignment
●● 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
●● noise
Answer: random disturbance that reduces of obscures image clarity
-SNR and quantum noise
●● Signal to Noise Ratio (SNR)
Answer: The ratio of the speech signal (intended signal) to that of the
background noise
-HIGH is ALWAYS best
,●● quantum noise
Answer: lack of sufficient data (photons) - results in blotchy or mottled
image. Increase mAs to fix
●● algorithms
Answer: complex math equations used to maintain image quality
●● Dynamic range
Answer: range of shades a digital system is capable of displaying as seen
by the human eye
●● 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
●● scotopic vision
Answer: night vision; uses rods of retina which are peripherally located
●● photopic vision
Answer: daylight vision; uses cones, centrally located
●● 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
●● 5 principal parts of Image Intensifier
Answer: input phosphor screen, photocathode, electrostatic focusing
lenses, accelerating anode*, output phosphor screen
●● Dead man's switch
Answer: apply positive pressure to switch (not constant power)
●● 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
●● photocathode
Answer: emits e- when stimulated by light in a process called
photoemission due to it being made of cesium and antimony compounds
-bonded directly to input phospher
