Explore BrainMass

Radiological Physics

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

a. The electrons that are boiled off the filament are attracted to the ___________.
b. The area on the target that the electrons strike is called the_________________.
c. The angle on the anode is usually between ____and ____degrees.
d. The exposure factor, ______, controls the speed of electrons flowing from the cathode to the anode.
e. The anode should be constructed of a material that has a high atomic number and high melting point. Two examples of suitable material are _________and____________.

© BrainMass Inc. brainmass.com October 25, 2018, 8:51 am ad1c9bdddf

Solution Preview

In a x-ray tube, there are two main structures: the filament and the anode. To generate x-rays, electrons need to interact with a material with high atomic number, as they can thus manipulate the trajectory of flying electrons easier, and also allow for more electron-electron interactions to occur (because in comparison, low atomic number = less attractive force from the nucleus and generally less electrons as well). The higher melting point is required because the ...

Solution Summary

The radiological physics targets are discussed.

See Also This Related BrainMass Solution

Bremsstrahlung and Radiological Physics

6. Electron interactions were characterized by a ratio "b/a". The ratio "b/a" represents:
a) Orbital electron distance to nuclear radius
b) Photon wavelength to atomic radius
c) Impact parameter to atomic radius
d) Orbital electron radius to nuclear radius

7. The electron-electron interaction that results in brehmsstrahlung results when the ratio of the "Impact parameter to atomic radius is"
a) Much less than 1
b) Approximately equal to 1
c) Much more than 1
d) Non-existent

8. Which material would be the most appropriate for the target in the head of a linac based only on ability to produce brehmsstrahlung
a) Helium (Z = 2)
b) Sodium (Z = 11)
c) Iodine (Z - 53)
d) Tungsten (Z = 74)

9. Which class of dose calculation algorithm is the most accurate for radiation therapy?
a) Correction-based
b) Mode based
c) Monte Carlo
d) All of the above

10. Monte Carlo is
a) A city in Monaco
b) A way to solve tough problems using statistical sampling
c) An accurate but computationally-expensive way to simulate radiation transport
d) All of the above.

View Full Posting Details