ch. 4 ch. 4 ch. 4 Ch. 12 starts ch. 12

100

Photoelectric
A photon with just slightly more energy than the electron binding energies of the tissue through which it passes is most likely to undergo what type of interactions?

100

4cm
How much thicker does the anatomical part need to be in order to absorb twice as much of the x-ray beam?

100

It has an atomic number of 56, so it can absorb a large number of x-rays.
If barium causes just as many Compton scatter interactions as normal fluids in the stomach, why does it show up white?

100

Compton
What interaction causes the most image fog?

100

Half the mAs
What happens to the mAs when there is a 4cm DECREASE in thickness?

200

75%
Roughly how much of the radiation STRIKING THE IMAGE RECEPTOR is secondary radiation?

200

Photoelectric effect
A photon is completely absorbed by an inner-shell orbital electron in the patient, and the electron ejects from its orbit. Name this interaction.

200

Compton electron, secondary electron, and Compton scatter photon.
What is the end product of Compton interaction?

200

Photoelectric effect
In bone, which interaction is more prevalent at very low kVp levels?

200

Double the mAs.
What happens to the mAs when for every 4cm increase in thickness?

300

Compton & Thompson Compton has 99%
Which two interactions within the patient result in scatter radiation? Which one has the greatest?

300

Compton
A photon with much more energy than the electron binding energies of the tissue through which it passes is most likely to undergo what type of interaction?

300

Photoelectric and Compton
Name two interactions in the patient that ionize atoms

300

Exponentially
How is the attenuation increased with tissue thickness?

300

The physical density of a substance is the amount of physical mass that is concentrated in a given area.
Define tissue density

400

Photoelectric
Which interaction contributes most to image contrast?

400

Photoelectric effect
A photon w/ slightly more energy than the electron binding energies of the tissue through which it passes is most likely to undergo what type of interaction?

400

Thompson and Compton
Name two interactions in the patient that cause scatter radiation

400

As the tissue area becomes thicker, the amount of attenuation is greater.
How is tissue thickness described in relation to attenuation?

400

greater attenuation
What happens to attenuation when the tissue density is higher?

500

Photoelectric
In bone, which interaction is more prevalent at very low kVp levels?

500

Bone is more physically dense and the atomic number is a notable difference.
How do bone molecules differ from soft tissue?

500

Photoelectric effect
What interaction contributes the most to subject contrast?

500

22cm
What is the average thickness of the abdomen?

500

Less attenuation
What happens to attenuation when the tissue density is lower?

Principles Ch. 4 and Ch. 12

Press F11 for full-screen mode

Edit | Download | Share

Correct Response      Continue