MOD 3 - IQ Criteria in Image Analysis

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Last updated 5:10 PM on 6/26/26
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6 Terms

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Brightness

  • represents the amount of light on an image and can still alter visualization of boney regions when kVp is not set to penetrate correctly

  • generally associated with the passage of the beam through the body and the attenuation of that beam in tissues

  • related to the quality of thebeam

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Types of Contrast

  • Radiographic

  • Subjective

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Radiographic Contrast

  • the ability to differentiate between brightness levels or gray shades on an image

  • high contrast = less grays

  • low contrast = lots of grays

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Subject Contrast

  • related to the radiation absorption gradient of different tissues

  • varying tissue packing densities, atomic structure and thickness adjust the characteristic absorption quality of the object being imaged

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Quantum Noise

caused by a lack of x-ray photons reaching the image receptor

<p><span>caused by a lack of x-ray photons reaching the image receptor</span></p>
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BTB is affected by

kVp, beam penetration