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Exposure Errors

Exposure Errors. Spring 2012 DEN 1218, Section 8230 Professor Childs-Williams Rachel Edwards Robin Kamenetsky. Overexposed Image. Appearance: the image appears dark.

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Exposure Errors

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  1. Exposure Errors Spring 2012 DEN 1218, Section 8230 Professor Childs-Williams Rachel Edwards Robin Kamenetsky

  2. Overexposed Image Appearance: the image appears dark. Cause: The receptor was overexposed to radiation. An overexposed image results from excessive exposure time, kilovoltage, or milliamperage, or a combination of these factors.

  3. Underexposed Image Appearance: the image appears light Cause- the receptor was underexposed to radiation. An underexposed image results from inadequate exposure time, kilovoltage, or milliamperage, or a combination of these factors.

  4. Blurred Image Appearance: a blurred image is seen on the radiograph Cause: either the tubehead or the patient moved during the exposure of the receptor. As a result, blurred images are seen on the radiograph.

  5. Cone Cut/ Partial Image Appearance: a clear (unexposed) area is seen on the image Cause: The PID was not directed at the center of the receptor, and the x-ray beam did not expose the entire receptor. As a result, a clear, unexposed area resembling the outline of the PID is seen on the radiograph

  6. Film Bending/ Distorted Image Appearance: the image appears stretched and distorted Cause: the film was bent excessively because of the curvature of the patient’s hard palate. As a result, stretched and distorted images are seen on the radiograph.

  7. Reversed Film/ Lead Foil Image Appearance: the light image with a herringbone pattern is seen on the radiograph Cause: the film was placed in the mouth backward and then exposed. The herringbone pattern on the radiograph is representative of the actual pattern embossed on the lead foil.

  8. Horizontal Overlap Appearance: overlapped contacts are seen on the image. Cause- the central ray was not directed through the interproximal spaces. As a result, the proximal surfaces of adjacent teeth appear overlapped in the bite-wing image. .

  9. Elongated Image Appearance: the teeth appear long and distorted on the image. Cause: The vertical angulation was insufficient (too flat). As a result, an image that is longer than the actual teeth, or an elongated image is seen on the radiograph.

  10. References: Heiserman, D. L. (2009). Faulty radiographs . Retrieved from http://www.free-ed.net/sweethaven/MedTech/DentalRa Iannucci, J. M. (2012). Dental radiography principles and techniques. (4th ed., pp. 226-235). St. Louis, Missouri: Elsevier. Luhn, R. (2008, April 1). Picture perfect x-rays. Retrieved from http://www.drbicuspid.com

  11. The End

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