Which of the following tests is performed to evaluate screen film contact?

The wire mesh test is utilized to evaluate screen film contact. This test involves placing a piece of wire mesh between the radiographic film and the intensifying screen during exposure. After processing the film, the areas where the mesh contact was made will appear sharper and darker compared to areas without contact, thereby indicating the effectiveness of the film-screen coupling.

This evaluation is crucial in ensuring optimal image quality, as poor contact can lead to a loss of sharpness and detail in the image due to blurring. The wire mesh test serves as a practical and simple method to assess this vital aspect of radiographic imaging.

In contrast, the spinning top test is primarily related to assessing the timer accuracy of radiographic equipment, while the penetrometer test evaluates the contrast of radiographic films. The star pattern test, on the other hand, is used to assess geometric sharpness and resolution of the imaging system. Each of these tests serves specific purposes in radiography but does not directly evaluate screen film contact.