What is the effect of an improperly closed cassette on x-ray film exposure?

An improperly closed cassette can lead to light leaks or uneven pressure on the x-ray film, which can result in a partially exposed film. When the cassette is not securely closed, ambient light can enter, causing certain areas of the film to become exposed while others remain unaffected. This results in a film that displays a mix of dark and light areas, indicative of partial exposure. In clinical practice, ensuring that the cassette is properly closed is crucial to maintain the integrity of the x-ray image and achieve a consistent and accurate diagnostic result.

A fully dark film would suggest complete overexposure, while a clear film implies no exposure occurred at all, which are not outcomes of a cassette that has merely been inadequately closed. If the cassette were sealed effectively, it would not impact exposure. Hence, recognizing the effect of improper closure is vital for maintaining quality in radiographic imaging.