1 / 19

Technical Artifacts and Errors

Technical Artifacts and Errors. Chapter 11. Artifacts. Anything that decreases the quality of the radiograph resulting in difficult evaluation and interpretation. Problems with artifacts: Increases unnecessary re-takes May cause misdiagnosis. Consistent Artifacts.

buck
Download Presentation

Technical Artifacts and Errors

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Technical Artifacts and Errors Chapter 11

  2. Artifacts • Anything that decreases the quality of the radiograph resulting in difficult evaluation and interpretation. • Problems with artifacts: • Increases unnecessary re-takes • May cause misdiagnosis

  3. Consistent Artifacts • If artifact is appearing consistently, cassette should be identified and thoroughly cleaned inside and out. • If fault is persistent should be labeled as faulty and put out of use.

  4. Common Artifacts and Causes • Film too Dark • Too much kVp • Too much developer time • Over-measurement • Machine not calibrated • SID not correct for grid use

  5. Artifacts continued • Film too light • Underexposure, need to increase kVp or mAs. • Underdeveloped • X-ray tube failure • Incorrect screen-film combination • Out of calibration

  6. Artifacts Continued • Film gray/Lack of Contrast • Too much kVp • Radiation fog due to exposure film • Light leak in darkroom • Film Storage issues • Exhausted chemical issues • Out of date film • Lack of grid with use of high kVp’s • Double exposure • Too high of wattage in safelight

  7. Artifacts continued • Lack of Detail • Increased object-film distance • Blurring due to poor screen-film contact • Blurring due to patient motion • Blurring due to x-ray tube motion • Distorted image due to central x-ray not directed at center of film • Double exposure

  8. Artifacts Continued • Heavy Lines on Radiograph • Grid lines due to inappropriate use of grid • Roller marks from processor issues • Inconsistent film density • Collimation of primary beam • Bucky tray not positioned correctly • Light leak into cassette • Target damage

  9. Artifacts continued • Black marks • Crimping or folding of film • Two films sticking together during development • Static Electricity • Developer on film before processing

  10. Artifacts continued • Clear areas on film • Hair in cassette • Scratch in film emulsion • Line de to scratch on screen surface • Air bubble in film • Contrast medium on cassette or table • Film touching side of tank during manual processing.

  11. Artifacts continued • Yellow Radiograph • Fixer splashes on film before developing • Premature age due to improper fixation • Film sticking together during fixing process • Incomplete washing.

  12. Motion

  13. Double Exposure

  14. Stuff in Cassette

  15. Hands in view

  16. Lead in the Way

  17. Light Artifact

  18. Cassette upside down

  19. Static

More Related