Exposure Technique Factors

Math Worksheet

1. mA and exposure time(must convert ms to sec and answer will be a whole number)

a) 100 mA 0.15 s = ___ mAs	b) 300 mA ___ s = 45 mAs
c) 400 mA 10 ms = ___ mAs	d) ___ mA 100 ms = 20 mAs

1. Maintaining mAs(must convert sec to ms and answer will be a whole number)

a) 500 mA ___ s = 40 mAs	b) 100 mA ___ s = 40 mAs
c) ___ mA 0.04 s = 40 mAs	d) 800 mA ___ ms = 40 mAs

1. 15% rule kVp(answer will be a whole number)

a)Increase 80 kVp 15% = ___

c)Decrease 90 kVp 15% = ___

e)Increase 60 kVp 30% = ___

1. Inverse square law(answer should be rounded to the second decimal place ex: 0.00)

200 mR (72 in)² XmR (38 in)²

= ² 500 mR = (56 in)²

X (40 in)

1. mAs/distance compensation(answer should be rounded to the second decimal place ex: 0.00)

50 mAs (72 in)² XmAs (40 in)²

= ² 100mAs = (72 in)²

X (56 in)