RT203 PRELIM-MIDTERM

X-ray photon energy is directly related to

1. I. Applied kilovoltage (kVp)

2. II. Applied milliamperes (mA)

3. III. Photon wavelength

• I only

• I and II only

• I and III only

• All of the above

Materials that emit light when stimulated by x-ray photons are called.

• 1. Ions

• 1. Electrodes

• 1. Phosphors

• 1. Crystals

Reduction in x-ray photon intensity as the photon passes through material is termed 

• Absorption

• Scattering

• Attenuation

• Divergence

In comparison with 60kVp, 80 kVp will:

1. I. Permit greater exposure latitude

2. II. Produce longer-scale contrast

3. III. Produce more scattered radiation

• I only

• II only

• I and II only

• All of the above

Which of the following contributes to the radiographic contrast present on the finished radiograph?

I. atomic number of tissues radiographed

II. Any pathologic processes

III. Degree of muscle development

• I and II only

• I and III only

• II and III only

• All of the above

An increase in kilovoltage will have which of the following effects?

I. More scattered radiation will be produced

II. The exposure rate will increase

III. Radiographic contrast will increase

• I only

• I and II only

• II and III only

• All of the above

Which of the following groups of exposure factors will produce the shortest scale of contrast?

• 200 mA, 0.08s, 96 kVp, 12:1 grid

• 500mA, 0.03s, 70kVp, 8:1 grid

• 300mA, 0.05s, 95kVp, 8:1 grid

• 600mA, 1/40s, 70kVp, 6:1 grid

Which of the following factors influence/s the production of scattered radiation?

            I. Kilovoltage level

            II. Tissue density

            III. Field size

• 1 only

• 1 and 2 only

• 1 and 3 only

• 1, 2, and 3

A 15% decrease in kilovoltage peak accompanied by a 50% increase in milliampere-seconds will result in a/an?

• Shorter scale of contrast

• Increase in exposure latitude

• Increase in radiographic density

• Decrease in recorded detail

Cassette front material can be made of which of the following?

I. Carbon fiber

II. Magnesium

III. Lead

• 1 only

• 1 and 2 only

• 1 and 3 only

• all of the above