Question

An exposure is made using 100 milliamperes (mA) and 0.05 seconds (s). How will

the patient dose change if the exposure is repeated using 200 mA and 0.025 s?
Patient dose increases
Patient dose decreases
Patient dose remains the same

Answer 1

The patient dose will decrease if the exposure is repeated with higher current and shorter exposure time. Patient dose is determined by the product of current and time.

Step-by-step explanation:

The patient dose will decrease if the exposure is repeated using 200 mA and 0.025 s.

Patient dose is determined by the product of the current (in amps) and exposure time (in seconds). In the first exposure, the dose is calculated as 100 mA * 0.05 s = 5 mAs (milliampere-seconds). In the second exposure, the dose is calculated as 200 mA * 0.025 s = 5 mAs.

Since the product of current and time is the same for both exposures, the patient dose remains the same.

Learn more about Radiation exposure and patient dose