RADIOGRAPHIC IMAGING AND EXPOSURE EXAM QUEASTIONS AND ANSWERS 300+ QUESTIONS WITH DETAILED SOLUTIONS
6 views 0 purchase
Course
RADIOGRAPHIC
Institution
RADIOGRAPHIC
RADIOGRAPHIC IMAGING AND
EXPOSURE EXAM QUEASTIONS AND
ANSWERS 300+ QUESTIONS WITH
DETAILED SOLUTIONS
1. Who discovered x-rays and in what year? how did they discover them -
ANSWER William Conrad Roentgen, 1895. Working with a low-vacuum
"Crookes Tube" and discovered x-rays by acc...
RADIOGRAPHIC IMAGING AND
EXPOSURE EXAM QUEASTIONS AND
ANSWERS 300+ QUESTIONS WITH
DETAILED SOLUTIONS
1. Who discovered x-rays and in what year? how did they discover them -
ANSWER ✔ William Conrad Roentgen, 1895. Working with a low-vacuum
"Crookes Tube" and discovered x-rays by accident.
2. Energy - ANSWER ✔ the ability to do work
3. X-rays are part of the ___ energy scale - ANSWER ✔ Electromagnetic
4. Three factors that determine whether or not an x-ray can move through a
certain matter - ANSWER ✔ Mass, atomic number, and thickness of the
matter
5. X-rays have __ frequency and __ wavelength - ANSWER ✔ high, short
6. Radiation exposure in air is measured with ___ or __ - ANSWER ✔
Roentgen (R) or Air Kermas (Gya)
14.Define radioactive disintegration (aka decay) - ANSWER ✔ Unstable atoms
spontaneoulsy emitting particles and energy from the nucleus in an effort to
reach stability
15.Define half-life - ANSWER ✔ The amount of time it takes for radiation
activity to reduce to 50% of its original activity level
16.How fast do x-rays travel in a vacuum? - ANSWER ✔ speed of light
(186,000 miles per second)
17.True or false: X-rays can be optically focused - ANSWER ✔ False
18.X-rays can cause __ and __ damage to living tissue. - ANSWER ✔
chemical and biologic
19.Describe ALARA - ANSWER ✔ As Low As Reasonably Achievables-rad
techs should minimize radiation dose to patients, themselves, and others
20.Three central principles of ALARA - ANSWER ✔ Time, distance and
shielding
21.In which year were some of the biologically damaging effects of x-rays
discovered? - ANSWER ✔ 1898
22.X-rays were discovered when they caused a ___-coated plate to fluoresce. -
ANSWER ✔ barium platinocyanide
23.X-rays have a dual nature, which means... - ANSWER ✔ they behave like
both waves and particles.
, 24.Wavelength and frequency are (directly/inversely) related - ANSWER ✔
inversely
25.X-rays have _____electrical charge. - ANSWER ✔ No
26.What is the radiation weighting factor (Wr) for x-rays and gamma rays? -
ANSWER ✔ Wr = 1
27.What is the filament? What purpose does it serve in the x-ray creation
process? - ANSWER ✔ A coiled tungsten wire in the cathode of the x-ray
tube. It is the source of electrons during x-ray production
28.Define thermionic emission - ANSWER ✔ Heating of the filament so the
outer shell electrons are boiled off and ejected
29.Define electron cloud - ANSWER ✔ The group of electrons surrounding the
filament
30.Define space charge - ANSWER ✔ The electrons liberated from the
filament during thermionic emission that form a cloud around the filament
31.Why is tungsten used for x-ray production? - ANSWER ✔ It has a high
melting point, which is necessary because of the high amount of heat
produced
32.What is the focusing cup made of, and what does it do? - ANSWER ✔ It is
made of nickel, and it surrounds the filaments and focuses the stream of
electrons from the filament towards the anode target
33.The anode is made of... (four different materials) - ANSWER ✔
Molybdenum, copper, tungsten, graphite
34.True or false: X-ray tubes with rotating anode targets are less common than
tubes with stationary anode targets. - ANSWER ✔ False
35.Define stator - ANSWER ✔ Electric motor that turns the rotor
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller SmartscoreAaron. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.99. You're not tied to anything after your purchase.
