Radiographic Discontinuity is a break in the test specimen’s structural continuity. The transmitted film density through the radiographic image of the body of. Step 3- Selection of Penetrameter: As per SE 142 or SE 1025 (for whole type) and SE-747 (for wire type), ASME V & ASME Sec VIII Div I, whole type or wire type penetrameter need to be selected. To … Versatile and fine grain. The wire type is the most frequently used IQI in radiography-by-film. Produced at 50 kVp and produced at 90 kVp with the mAs adjusted to maintain radiographic density (C). How x-rays work. Methods: The three types of film were … Step 4: IQI- Image Quality Indicator.