Medical physics quiz

Definition of intensity

Select the correct option

• μ of bone > μ of tissue

• μ of bone < μ of tissue

• μ of bone = μ of tissue

If a material has a greater attenuation coefficient...

• It absorbs x-rays less

• It absorbs x-rays more

An x-ray beam with parallel sides that do not spread out is called a...

• Linear beam

• Parallel beam

• Collimated beam

• Collinated beam

Intensity is...

• Directly proportional to the distance from the source

• Directly proportional to the square of the distance from the source

• Inversely proportional to the distance from the source

• Inversely proportional to the square of the distance from the source

Select all the examples of contrast media

(HINT: there is MORE than one)

• Hydrogen

• Barium

• Oxygen

• Iodine

Contrast media is used to image bones

• True

• False

The distance in which the intensity halves is called the ____ _____ _________. ​

What does a 'barium meal' contain?

• Barium

• Barium sulphate

• Barium nitrate

• Barium hydroxide

What is the gradient of a ln I ( y - axis) againt x (x - axis)?

• μ

• I

• I₀

• -μ