Friday, February 27, 2009

Light leakage


Look at the above radiograph. There is a thick black line at the edges of the film. What do you think has happened?

Apparently, the radiographer had accidentally open the cassette hinges in the dark room without turning off the light. Immediately upon realising the mistake, he quickly closed the hinges. Unfortunately, when the cassette was opened, light had leaked and caused the fog on the film. That is the reason for the black line.

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