Math and Terminology for Radiography

Question 1

What is the unit for the Air Kerma?

Answer 1

Joules/kilogram
J/Kg
Gy(a)

Question 2

What does the Sv measure?

Answer 2

Radiation received by radiation
workers
Occupational exposure

Question 3

What does the Bq measure?

Answer 3

The amount of ‘activity’ within a
radionuclide.

Question 4

Thousand

Answer 4

Kilo

Question 5

Thousand

Answer 5

Milli

Question 6

Tenth

Answer 6

Deci
10^-1
d

Question 7

Billionth

Answer 7

Micro
10^-6
U

Question 8

Hundredth

Answer 8

Centi
10^-2
c

Question 9

Name three ways a division problem
can be written.

Answer 9

Fraction
Ratio
Decimal
Set up as a traditional division
problem

Question 10

What is the first operation you need
to complete before you can add or
subtract fractions?

Answer 10

common denominator

Question 11

What is the common
denominator for 12…6…8…16?

Answer 11

48

Question 12

What is the first operation you must
complete before you can divide
fractions?

Answer 12

Reciprocate the second fraction
(denominator)

Question 13

What is the rule for changing a
fraction to a decimal?

Answer 13

You divide the denominator into the
numerator
You divide the lower number into the
upper number

Question 14

What is the rule for changing
percentages to decimals?

Answer 14

Divide the percentage by 100
Move the decimal two places to the
left

Question 15

What is a ratio?

Answer 15

Defines a relationship between two
numbers
Special types of fraction

Question 16

What is a proportion?

Answer 16

The relationship of one ratio to
another
Type of algebraic formula

Question 17

What does the Gya measure?

Answer 17

Measures number of ions in the air
X-ray machine output
Radiation exposure
Radiation intensity

Question 18

What does the Gray measure?

Answer 18

Radiation Absorbed Dose

Question 19

What is the Gyt used to measure?

Answer 19

Experimental dose of radiation or
radiation absorbed by a patient

Question 20

What is/are the units for absorbed
dose?

Answer 20

Gy
Gy(t)

Question 21

What is the difference between
the Gyt and Sv as units of
measure for radiation?

Answer 21

The Gyt is the absorbed tissue
dose and Sv is effective dose
for occupational monitoring.