Review

Fundamentals

100

When were x-rays discovered and by who?

November 8, 1895 by Wilhelm Roentgen

200

Distance traveled divided by the time needed to cover the distance is the formula to find? D/T=

Velocity

300

Early on, the excessive radiation exposure to many operators and patients resulted in radiation burns, a delayed response to the exposure. What is the name for these burns?

acute radiodermitis

400

What are some examples of derived quantities?

Velocity, acceleration, force, momentum, work and power

500

The standard radiologic unit that quantifies occupational exposure or dose equivalent is the

Rem

Electromagnetic and Particulate Radiations

100

Discovery of the electron is attributed to?

Joseph John “J.J.” Thomson

200

The force that holds the protons and neutrons together in the nucleus is called

nuclear binding energy

300

What is the speed of light in which all members of the electromagnetic spectrum travel?

3 x 10⁸ m/s

400

Particulate radiation includes

alpha and beta particles

500

How is half-life defined?

The time it takes for half the remaining in an amount of a radioactive element to decay

X-ray Circuit

100

If a conductor is curved where will the greatest amount of charge be found?

at the area of the greatest curvature

200

The ability to do work due to the separation of charges is called?

electric potential

300

How is ohms law written?

V=IR

400

A material that is strongly attracted to a magnetic field is?

ferromagnetic

500

In which part of the circuit is the step-down transformer located?

filament circuit

X-ray Tube

100

What is the protective tube housing lined with?

Lead

200

What type of envelopes is arcing a problem for?

glass envelopes

300

Why is copper used in a rotating anode?

It is a good conductor

400

How many turns does the induction motor turn the rotor in a general purpose tube 

3400 rpm

500

What is the formula for heat units?

heat units (HU) = kvp x mA x s x c

Production and Interactions

100

What are the different names for classical interactions?

coherent and thomson scattering

200

If a filament electron leaves the tungsten atom with 15 keV of energy and the brems photon produced was 65 keV, how much energy did the incoming filament electron have?

80 keV

300

What is the equivalent of doubling the mAs if the original kVp is 80.

92 kvp

400

How much energy does a Compton scatter photon retain regardless of interaction?

two thirds of its energy retained.

500

In which interaction does the energy of the incident photon have to be equal to or greater than the binding energy of a inner shell electron 

Photoelectric interactions