Grid ratio is represented by the formula:

When changing your SID from 72” to 56”

According to the inverse square law, when the distance between the x-ray source and the point of measurement (patient, worker, or receptor) increases, the beam quantity will:

Penumbra (blur) decreases as

If an initial exposure is made using 800 mA, 0.02 sec, 16 mAs, 70 kVp, 58” SID, 4” OID, 5:1 grid ratio, 0.2 mm focal spot and 3.0 mm of filtration, with a 14 x 17 in field size, and the technologist changes the SID to 40” for a second exposure without changing any other factors, what differences would you expect to see in the second exposure?1) Increased IR exposure2) Decreased IR exposure3) Increased contrast4) Decreased contrast5) Increased spatial resolution6) Decreased spatial resolution7) Increased distortion8) Decreased distortion

Calculate the new mA required to maintain the same IR exposure produced with the original values.

A radiograph is acquired with a source-to-skin distance (SSD) of 50 inches. If the radiograph is repeated using the same exposure factors, but the SSD decreases to 35 inches, the patient’s dose will:

Ten kVp is considered a 15% change in which of these kVp ranges?

If a radiograph is produced using a milliampere (mA) of 400 and 0.05 seconds, how should the exposure time be changed if the mA is decreased to 200?

An x-ray exposure at 50 inches results in a beam intensity of 200 µGy. Estimate the new intensity for a distance of 40 inches.