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ARTIFACTS:ARTIFACTS:AN UNWANTED DENSITYAN UNWANTED DENSITYON THE FILMON THE FILM
http://www.xray2000.co.uk/
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Artifacts - TypesArtifacts - Types
Processing ArtifactsProcessing Artifacts
Exposure ArtifactsExposure Artifacts
Handling & Storage Handling & Storage ArtifactsArtifacts
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Processing ArtifactsProcessing Artifacts
Emulsion pickoffEmulsion pickoff Chemical fogChemical fog Guide-shoe marksGuide-shoe marks Water marksWater marks Chemical spotsChemical spots Guide-shoe & roller scratchesGuide-shoe & roller scratches
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Developer Spots
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55Water spot
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Discolored film due to hypo (fixer) retention.
Chemicals not washed off – over time will turn
film brown
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Scratch marks from rollers in automatic processor.
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Exposure ArtifactsExposure Artifacts
MotionMotion Improper patient positionImproper patient position Wrong screen-film matchWrong screen-film match Poor film/screen contactPoor film/screen contact Double exposureDouble exposure Warped cassetteWarped cassette Improper grid positionImproper grid position
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ArtifactArtifact
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Blurred image due to patient motion
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PATIENT ARTIFACT - PATIENT ARTIFACT - JEWERLYJEWERLY
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Handling & Storage Handling & Storage ArtifactsArtifacts Light fogLight fog Radiation fogRadiation fog StaticStatic Kink marksKink marks ScratchesScratches Dirty cassettesDirty cassettes
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Crimping /cresent Crimping /cresent markmark
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Double Exposure
2 exposures made on top of each other –
from poor handling of cassettes
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Static electricity
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Dirt on screen mimicking a foreign object.
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Scratch marks from improper handling.
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Light fog
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Kink mark or nail pressure mark
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castcast
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POOR SCREEN POOR SCREEN CONTACTCONTACT
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Patient motionPatient motion
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motionmotion
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Double Double exposureexposure
ChildChild
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PoorPoorscreen screen contactcontact
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Double exposureDouble exposure
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??
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??
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Pt clothing
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Hip replacement
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2 chest tubes in the patient
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3535Patient swallowed batteriesWhat size are they?
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PATHOLOGY NOT PATHOLOGY NOT ARTIFACTARTIFACT
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Name &Name & cause causeof this?of this?
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scratches
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Digital image
Mis-
Registration
error
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Roller marks from film stuck –
then pulled from processor
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Hardware
In cervical
spine
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Dust in imaging plate can Dust in imaging plate can cause white marks on cause white marks on image image
Both in film/screen and Both in film/screen and computed radiographycomputed radiography
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E E G MONITOR
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What do you
See?
2 exposures
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Evaluating ImagesEvaluating Images
What do you think?What do you think?
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See anythingSee anythingwrong wrong
with with this this
image?image?
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Contrast? What influences this? (kVp in Contrast? What influences this? (kVp in f/s)f/s)
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Collimation – reducing the size of beamCollimation – reducing the size of beamhelps to improve the image, and reduce the helps to improve the image, and reduce the dose to the patientdose to the patient
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?