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WorksheetsRadiographic Image Production Chapter 2 – Key Terms
Total questions: 20
Worksheet time: 10mins
Which term describes the kinetic energy released per unit mass of air by ionizing radiation, measured in gray (Gy)?
KSTD
KIND
Air kerma
KTGT
Which metric represents the measured exposure incident on the image receptor for a specific exposure?
Indicated equivalent air kerma (KIND)
Target equivalent air kerma value (KTGT)
Air kerma at patient entrance
Standardized radiation exposure (KSTD)
Which value is defined as the optimal Winked exposure for a specific body part and projection?
Target equivalent air kerma value (KTGT)
Air kerma in free air
Indicated equivalent air kerma (KIND)
Standardized radiation exposure (KSTD)
Which standardized reference exposure is used to evaluate imaging system performance?
Kerma free-in-air
KTGT
KIND
KSTD
Which statement best defines Detective Quantum Efficiency (DQE)?
The ability of a system to display fine spatial detail
The amount of unwanted interference that degrades image quality
How efficiently an imaging system converts X-ray input into image
The smallest individual element of a digital image array
Which term compares useful image signal relative to background noise?
Modulation transfer function (MTF)
Noise power spectrum (NPS)
Signal-to-noise ratio (SNR)
Detective quantum efficiency (DQE)
Which measurement describes the spatial frequency content of noise in an image?
Contrast transfer function
Signal-to-noise ratio (SNR)
Dynamic range descriptor
Noise power spectrum (NPS)
Which concept refers to the ability of a digital imaging system to display subtle differences in shades of gray?
Dynamic range
Contrast resolution
Spatial resolution
Brightness
Which concept refers to the ability of an imaging system to display fine detail?
Spatial resolution
Latitude
Contrast resolution
Dynamic range
Which term defines the range of exposure values a detector can accurately respond to?
Latitude
Dynamic range
KIND
Bit depth
Which term defines the range of exposures that will still produce a diagnostic image?
Exposure index
Dynamic range
Latitude
Air kerma
Which parameter determines the number of grayscale levels per pixel in a digital image?
Field of view
Matrix size
Pixel bit depth
Air kerma
Which item is the smallest individual element of a digital image?
Voxel
Kernel
Pixel
Bit
Which term describes the arrangement of pixels in rows and columns that make up a digital image?
Array factor
Kernel
Matrix
Grid frequency
Which system records data as discrete numerical values rather than continuous signals?
Digital system
Continuous system
Analog system
Hybrid system
Which system records a continuously changing signal without breaking it into discrete units?
Analog system
Digital system
Quantized system
Binary system
Which term refers to the visual appearance of lightness or darkness on a display monitor?
Brightness
Latitude
Contrast
Bit depth
Field of view (FOV) is best defined as which of the following?
Amount of patient anatomy included in the image
Area of detector receiving peak exposure only
Maximum cone angle of the X-ray beam
Size of pixel used at reconstruction
Which pair correctly matches concept with definition?
SNR: ratio of useful signal to noise
MTF: measure of spatial noise bandwidth
NPS: spectrum describing noise spatial frequencies
DQE: efficiency of converting X-rays to image
Which statements about exposure metrics are correct?
KTGT is the target exposure for a view
KIND is measured exposure at the image receptor
KSTD is a standardized reference exposure
Air kerma is the energy per mass in tissue
