Which lead letter is used during radiography to indicate a film-side IQI?

Which lead letter is used during radiography to indicate a film-side IQI?

• A. E
• B. F
• C. G
• D. H

Answer: (B)

The main idea is that a lead marker on the IQI tells you which side of the film the indicator represents. For radiography, the marker associated with the film-facing side is the letter F, so seeing F on the radiograph confirms the IQI reading corresponds to the film side. This distinction is important because the IQI is calibrated for a specific path of exposure, and misidentifying the side could lead to incorrect interpretation of image quality. The other markers relate to the opposite side or different configuration indicators and do not denote the film side.

The main idea is that a lead marker on the IQI tells you which side of the film the indicator represents. For radiography, the marker associated with the film-facing side is the letter F, so seeing F on the radiograph confirms the IQI reading corresponds to the film side. This distinction is important because the IQI is calibrated for a specific path of exposure, and misidentifying the side could lead to incorrect interpretation of image quality. The other markers relate to the opposite side or different configuration indicators and do not denote the film side.