RADIOGRAPHIC IMAGING AND EXPOSURE
CHAPTERS 1 THROUGH 10 EXAM PREP
QUESTIONS AND ANSWERS FULLY VERIFIED
◉ Jerman.
Answer: Father of Radiologic Technology An analysis of the end-
result: the radiograph.
◉ 1926.
Answer: 6:59. Outline Image Production, 71 Image Receptor
Systems, 73 Digital Radiography (DR), 74 Image Quality Factors, 75
Image Signal Factors, 76 Image Resolution Factors, 85 Contrast
Resolution, 87 Image Receptor Contrast, 87 Fluoroscopic Imaging,
87 Summary, 88 Objectives On completion of this chapter, the
student will be able to: • Discuss primary, scatter, and remnant
radiation. • Describe the fundamentals of image production. •
Describe the two major categories of image receptor systems used
today in radiography. • Compare and contrast the latent image
formation process for computed radiography systems, and indirect
and direct conversion digital radiography. • Discuss image quality in
terms of image receptor exposure (signal value), contrast (signal
differences), spatial resolution, and contrast resolution. • Describe
fluoroscopic imaging.
,◉ Attenuation.
Answer: Process by which a beam of radiation is reduced in energy
when passing through tissue or other materials.
◉ Automatic Rescaling.
Answer: Process by which images are produced with uniform
brightness and contrast, regardless of the amount of exposure.
◉ Brightness.
Answer: Function of a display monitor; changes image
lightness/darkness.
◉ Computed Radiography (CR).
Answer: Digital image acquisition modality that uses storage
phosphor plates to produce images.
◉ Contrast.
Answer: Contrast is the difference between the ranges of adjacent IR
exposures represented as gray tones in an image.
◉ Contrast Resolution.
Answer: Ability to distinguish between very subtle differences in
image receptor exposures and differentiate them from the noise in
the image.
,◉ Data Drop.
Answer: Condition due to extreme overexposure, which causes
digital detector elements to become overwhelmed with photon
energy and leads to drop of data during image reconstruction.
◉ Detector Element (DEL).
Answer: Pixel-size element of the digital radiography image receptor
that has a fixed dimension in x- and y-orientation.
◉ Detector Saturation.
Answer: Data drop that involves areas or regions of the digital
detector.
◉ Digital Radiography (DR).
Answer: Digital image acquisition systems that convert x-ray energy
into a digital electronic signal for manipulation and display using
direct or indirect conversion.
◉ Direct Conversion Flat-Panel Detector.
Answer: Device that converts incident x-ray energy directly into an
electronic signal, typically using a photoconductor as the x-ray
absorber and a thin-film transistor as the signal collection area,
, which then sends the electronic signal to the computer for
processing and viewing.
◉ Displayed Image Contrast.
Answer: Relative brightness difference between the adjacent pixels
in a digital image as viewed on a monitor.
◉ Distortion.
Answer: Misrepresentation of the true size or shape of an object.
◉ Exposure Indicator.
Answer: Numeric representation of the quantity of exposure
received by a digital image receptor.
◉ Exposure Latitude.
Answer: Range of exposures that produce a diagnostic-quality
image.
◉ Fog.
Answer: Undesirable exposure to the image receptor.
◉ Grayscale Bit Depth.
CHAPTERS 1 THROUGH 10 EXAM PREP
QUESTIONS AND ANSWERS FULLY VERIFIED
◉ Jerman.
Answer: Father of Radiologic Technology An analysis of the end-
result: the radiograph.
◉ 1926.
Answer: 6:59. Outline Image Production, 71 Image Receptor
Systems, 73 Digital Radiography (DR), 74 Image Quality Factors, 75
Image Signal Factors, 76 Image Resolution Factors, 85 Contrast
Resolution, 87 Image Receptor Contrast, 87 Fluoroscopic Imaging,
87 Summary, 88 Objectives On completion of this chapter, the
student will be able to: • Discuss primary, scatter, and remnant
radiation. • Describe the fundamentals of image production. •
Describe the two major categories of image receptor systems used
today in radiography. • Compare and contrast the latent image
formation process for computed radiography systems, and indirect
and direct conversion digital radiography. • Discuss image quality in
terms of image receptor exposure (signal value), contrast (signal
differences), spatial resolution, and contrast resolution. • Describe
fluoroscopic imaging.
,◉ Attenuation.
Answer: Process by which a beam of radiation is reduced in energy
when passing through tissue or other materials.
◉ Automatic Rescaling.
Answer: Process by which images are produced with uniform
brightness and contrast, regardless of the amount of exposure.
◉ Brightness.
Answer: Function of a display monitor; changes image
lightness/darkness.
◉ Computed Radiography (CR).
Answer: Digital image acquisition modality that uses storage
phosphor plates to produce images.
◉ Contrast.
Answer: Contrast is the difference between the ranges of adjacent IR
exposures represented as gray tones in an image.
◉ Contrast Resolution.
Answer: Ability to distinguish between very subtle differences in
image receptor exposures and differentiate them from the noise in
the image.
,◉ Data Drop.
Answer: Condition due to extreme overexposure, which causes
digital detector elements to become overwhelmed with photon
energy and leads to drop of data during image reconstruction.
◉ Detector Element (DEL).
Answer: Pixel-size element of the digital radiography image receptor
that has a fixed dimension in x- and y-orientation.
◉ Detector Saturation.
Answer: Data drop that involves areas or regions of the digital
detector.
◉ Digital Radiography (DR).
Answer: Digital image acquisition systems that convert x-ray energy
into a digital electronic signal for manipulation and display using
direct or indirect conversion.
◉ Direct Conversion Flat-Panel Detector.
Answer: Device that converts incident x-ray energy directly into an
electronic signal, typically using a photoconductor as the x-ray
absorber and a thin-film transistor as the signal collection area,
, which then sends the electronic signal to the computer for
processing and viewing.
◉ Displayed Image Contrast.
Answer: Relative brightness difference between the adjacent pixels
in a digital image as viewed on a monitor.
◉ Distortion.
Answer: Misrepresentation of the true size or shape of an object.
◉ Exposure Indicator.
Answer: Numeric representation of the quantity of exposure
received by a digital image receptor.
◉ Exposure Latitude.
Answer: Range of exposures that produce a diagnostic-quality
image.
◉ Fog.
Answer: Undesirable exposure to the image receptor.
◉ Grayscale Bit Depth.
