Exam 9: X-ray Interaction with Matter

Compton interactions,photoelectric absorption,and transmitted x-rays all contribute to _____.

High kVp techniques reduce _____.

K-shell binding energy increases with increasing _____.

Attenuation is caused by _____.

Differential absorption is dependent on (the)_____.

Only at energies above 10 MeV can _____ take place.

The two primary forms of x-ray interaction in the diagnostic range are _____.

Differential absorption in diagnostic imaging is primarily caused by _____.

Which x-ray interaction involves the ejection of the K-shell electron?

Compton scatter is directed at _____ angle from the incident beam.

As kVp _____,the probability of photoelectric absorption _____.

Barium is a good contrast agent because of its _____.

When the mass density of the absorber is _____,it results in _____ Compton scatter.

The use of contrast agents increases the amount of _____.

A negative contrast agent is _____.

Because of differential absorption,about _____% of the incident beam from the x-ray tube contributes to the finished image.

In _____,there is complete absorption of the incident x-ray photon

_____ occurs only at the very high energies used in radiation therapy and in nuclear medicine P.E.T. imaging.

At energies below 40 keV,the predominant x-ray interaction in soft tissue and bone is _____.

An outer-shell electron is ejected and the atom is ionized during _____.