How does the AEC allow for adjustment for fat people
Using automated exposure the technologist is able to increase the phototimer density setting using the +1, +2, +3, or +4 setting. Each increase in the phototimer setting is equivalent to about a 25 percent change in the mAs. Thus the exposure can be increased for large patients and decreased (-1, -2, -3, etc.) for a thin patient or those with chronic obstructive pulmonary disease (COPD).