Which of the following increments in OD indicates a doubling or halving in opacity?

The primary controlling factor of contrast is:

The product of mA and exposure time is equal to ____.

The heavy black densities produced on a radiographic image after processing correspond to what region of the characteristic curve?

A ____ is a device designed to expose the film to a reproducible, uniform light through a series of progressively darker filters or optical step wedges.

OID is related to recorded detail in which of the following ways?

The mA station is changed from 300 mA to 150 mA.  Which of the following changes in the x-ray beam will occur?

A radiographic image is taken of a lateral femur using 80 kVp and 10 mAs that demonstrates insufficient density.  In using the 15% rule, which of the following changes should be made for the second exposure in order to achieve an acceptable radiograph?

In a PA projection of the chest being used for cardiac evaluation, the heart measures 15.2 cm on the radiographic image.  If the magnification factor is known to be 1.3, what is the actual diameter of the heart?

Which of the following describes the relationship between changes in SID and maintaining radiographic density?