Which one of these tells the radiographer what new mAs to use when the SID changes to maintain IR exposure?

If the image is 6 inches wide and the object is 4.5 inches wide, what is the percent magnification?

A radiograph is made with a 36-inch source-to-image distance (SID) resulting in a receptor exposure of 0.01 milligray (mGy). What will the receptor exposure be if the SID is changed to 72 inches?

A radiograph is acquired using 120 kilovoltage peak (kVp), a 16:1 grid, 72 inch source-to-image distance (SID), 500 milliamperes (mA), and using automated exposure control (AEC). How could these settings be changed to increase the radiographic contrast?

If the image is 10 inches long, the object is 9 inches long and the SID is 70 inches, what is the SOD?

Which of these is the optimum kVp for an exposure of an abdomen with barium?

Which grid error results in grid cut-off and loss of exposure on the outside edges of the image receptor (IR)?

Which combination of variables will result in a radiograph with the highest contrast?

Which beam position would produce superimposition of parts A, B and C?

Which one of these types of filters is sometimes shaped like a wedge?