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Image Compositing Artifact
Case Detail
| Anatomy: Brain-Spine |
 Joseph Junewick, MD FACR |
| Diagnostic Category: Radiation Safety-Physics |
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| Created: about 1 month ago |
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| Updated: about 1 month ago |
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| Tags:
PEDS
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| Modality/Study Types:
CR
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Activities:  PDF  ImageJA |
History
2 year old male with halo traction for scoliosis.
Case Images
Diagnosis
Image Compositing Artifact
Findings
CR – AP scoliosis radiograph shows apparent “spinal dislocation” in the upper lumbar region.
Discussion
Image composite artifact occurs when multiple separate radiographic images are sewn together to make a single image. Usually 2 or 3 CR cassettes are arranged into a single holder with a slight overlap. Using fiducial markings in the images, the overlapping exposures are digitally combined. Failure to recognize this artifact can incorrectly attribute pathology.
Reference
Walz-Flannigan A, Magnuson D, Erickson D, Schueler B. Artifacts in digital radiography. AJR (2012); 198:156-161.