Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. Digital Image Artifacts Chapter 31

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 2 Digital Image Receptor Artifacts  Dust, dirt, or scratches  Ghost images  Software artifacts  Object artifacts  Collimation errors  Histogram errors

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 3 Debris on Image Receptor

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 4 Glue on CR Imaging Plate

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 5 Ghost Image

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 6 Preprocessing Failure

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 7 Background Radiation

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 8 Partitioning GOOD 2 or 4 fields Clear margins Distinct edges POOR 3 fields Unclear margins Indistinct edges

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 9 Incorrect vs Correct Partitioning

Elsevier items and derived items © 2009 by Mosby, Inc., an affiliate of Elsevier Inc. 10 Collimation Artifact