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What is the unit of image resolution?

The tolerance range of acceptable source-image distances that can be used with a focused grid is the:

The height of the lead strips compared to the distance between the lead strips is the definition of:

The distance betwee the x-ray tube and the image receptor is called the:

Decreasing collimation (opening up the field size) results in:

If the x-ray emission spectra shown were produced using the same mAs and kVp, which of the curves most likely represents a beam possessing the greatest amount of filtration?

The distance between the grid and the convergent line is the:

The number of lead lines per inch or centimeter is the grid:

All of the following are considered  beam-restricting devices EXCEPT

A trauma radiograph of the lower leg was performed in the ER. While the patient was on the x-ray table, the foot and ankle were supported by multiple cushions and elevated higher than the knee. What type of distortion, if any, would most likely be manifested on the radiograph?