RAD 147 Exam 2 Review

An image that has excessive brightness is considered

• diagnostic

• underexposed

• high density

• overexposed

The radiologic technologist adjusts an image by decreasing the kVp.  What effect will this have on the image?

• decrease contrast

• increase contrast

• decrease detail

• increase fog

Low energy radiation will result in which of the following

• medium scale of contrast

• long scale of contrast

• short scale of contrast

• has no effect on contrast

Contrast is a quality related to the ___________ of the image

• accuracy of structural lines

• visibility of structures

• detail

• spatial resolution

The main components of image quality are

• brightness

• contrast

• spatial resolution

• distortion

• diagnosis

Which type of tissue interaction involves the loss of all energy in the incident photon to a target atom, resulting in the ejection of a k-shell electron?

• Photoelectric

• Compton

• Coherent

• Bremsstrahlung

X-rays have the ability to ionize matter. Ionization involves:

• the removal of orbital electrons

• the removal of protons

• the addition of neutrons

• the magnetization of the atom

The intensity of radiation on an object is reduced with distance because the radiation ___________.

• reduces its velocity

• increases in wavelength

• loses its energy

• is spread out over a greater area

A 4” wide object was exposed at 36” SID and was placed 4” from the IR. What will be the image width?

• 4.4"

• 3.5"

• 2.0"

• 4.8"

An exposure was made using 70 kVp @ 12 mAs. In order to maintain receptor exposure, what mAs value should be selected if the kVp is increased to 92kVp?      

• 6 mAs

• 3 mAs

• 12 mAs

• 24 mAs