Image Production and Evaluation
Questions and Answers Latest Update
Graded A+
What is the primary factor controlling image brightness in digital radiography?
✔✔ Automatic rescaling and window level adjustment
Which type of contrast is affected by the selection of kVp?
✔✔ Subject contrast
What effect does increasing mAs have on image exposure?
✔✔ Increases image brightness and patient dose
What is the result of excessive OID in an X-ray image?
✔✔ Increased magnification and loss of sharpness
Which type of digital image processing adjusts contrast and brightness automatically?
✔✔ LUT (Look-Up Table) application
1
,What happens to spatial resolution when the focal spot size is increased?
✔✔ Decreases spatial resolution
What is the function of a histogram in digital imaging?
✔✔ Analyzes pixel values for proper image display
Which factor primarily affects quantum mottle?
✔✔ Insufficient mAs
What is the purpose of window width adjustment in digital imaging?
✔✔ Controls image contrast
Which type of scatter radiation reduces image contrast?
✔✔ Compton scatter
What happens to image sharpness if motion occurs during an exposure?
✔✔ Motion blur reduces sharpness
2
, Which imaging system uses photostimulable phosphors?
✔✔ Computed radiography (CR)
What is the main cause of image noise in digital radiography?
✔✔ Low signal-to-noise ratio (SNR)
Which post-processing function is used to suppress background noise?
✔✔ Edge enhancement
What is the primary function of automatic exposure control (AEC)?
✔✔ Adjusts exposure time for consistent image density
Which part of a digital detector captures and converts X-rays into an electrical signal?
✔✔ Thin-film transistor (TFT)
What happens when the exposure field is not correctly collimated?
✔✔ The histogram analysis may fail, affecting image quality
3
Questions and Answers Latest Update
Graded A+
What is the primary factor controlling image brightness in digital radiography?
✔✔ Automatic rescaling and window level adjustment
Which type of contrast is affected by the selection of kVp?
✔✔ Subject contrast
What effect does increasing mAs have on image exposure?
✔✔ Increases image brightness and patient dose
What is the result of excessive OID in an X-ray image?
✔✔ Increased magnification and loss of sharpness
Which type of digital image processing adjusts contrast and brightness automatically?
✔✔ LUT (Look-Up Table) application
1
,What happens to spatial resolution when the focal spot size is increased?
✔✔ Decreases spatial resolution
What is the function of a histogram in digital imaging?
✔✔ Analyzes pixel values for proper image display
Which factor primarily affects quantum mottle?
✔✔ Insufficient mAs
What is the purpose of window width adjustment in digital imaging?
✔✔ Controls image contrast
Which type of scatter radiation reduces image contrast?
✔✔ Compton scatter
What happens to image sharpness if motion occurs during an exposure?
✔✔ Motion blur reduces sharpness
2
, Which imaging system uses photostimulable phosphors?
✔✔ Computed radiography (CR)
What is the main cause of image noise in digital radiography?
✔✔ Low signal-to-noise ratio (SNR)
Which post-processing function is used to suppress background noise?
✔✔ Edge enhancement
What is the primary function of automatic exposure control (AEC)?
✔✔ Adjusts exposure time for consistent image density
Which part of a digital detector captures and converts X-rays into an electrical signal?
✔✔ Thin-film transistor (TFT)
What happens when the exposure field is not correctly collimated?
✔✔ The histogram analysis may fail, affecting image quality
3
