100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
Previously searched by you
TEST BANK for Radiologic Science for Technologists 11th Edition Physics, Biology, and Protection by Stewart C. Bushong With Questions and Answers (Graded +$12.99
Add to cart
TEST BANK for Radiologic Science for Technologists 11th Edition Physics, Biology, and Protection by Stewart C. Bushong With Questions and Answers (Graded +
5 views 0 purchase
Course
Radiologic Science for Technologists 11th Edition
Institution
Radiologic Science For Technologists 11th Edition
TEST BANK for Radiologic Science for Technologists 11th Edition Physics, Biology, and Protection by Stewart C. Bushong With Questions and Answers (Graded +
The most widely used support structure for the x-ray tube is the - Correct Answer>>ceiling support system
The external structure of t...
TEST BANK for Radiologic Science for Technologists 11th
Edition Physics, Biology, and Protection by Stewart C. Bushong
With Questions and Answers (Graded +
The most widely used support structure for the x-ray tube is the - Correct
Answer>>ceiling support system
The external structure of the x-ray tube includes the support structure, the
protective housing and the - Correct Answer>>glass envelope.
As an x-ray tube ages, the inside can become coated with tungsten, which
can cause - Correct Answer>>arcing.
The negative side of the x-ray tube holds the - Correct Answer>>filament
What is the most common cause of tube failure? - Correct
Answer>>Tungsten Vaporization
The filament is made up of - Correct Answer>>tungsten
Thermionic emission at the filament creates a - Correct Answer>>space
charge.
The rotating anode is turned by a - Correct Answer>>magnetic field
When electrons bombard the target, ____% of their kinetic energy is
converted to heat. - Correct Answer>>99
The target of the rotating anode is usually coated with a _____ alloy. - Correct
Answer>>tungsten
,The _____ is the source of radiation in the x-ray tube. - Correct
Answer>>focal spot
Because of the line focus principle, the effective focal spot size decreases
with decreasing - Correct Answer>>target angle
High capacity tube rotors revolve at - Correct Answer>>10,000 rpm
The x-ray intensity is lower on the anode side of the tube because of the -
Correct Answer>>heel effect
The cathode side of the tube should be directed toward the ______ part of the
patient. - Correct Answer>>thicker
What is the formula for heat units for a 3 phase, 6 pulse x-ray machine? -
Correct Answer>>1.41 x kVp x mA x s
Tube failure can occur from - Correct Answer>>long exposure times
The filament in an x-ray tube is about ______ cm in length - Correct
Answer>>1 to 2
A dual focus tube has two - Correct Answer>>filaments
Each tube has its own tube rating chart to show - Correct
Answer>>maximum exposure times.
The _______ are outside the glass envelope. - Correct Answer>>stators
Extrafocal or off focus radiation is produced from - Correct
Answer>>rebounding electrons
,The heel effect is caused by the - Correct Answer>>anode angle
The effective focal spot size is ________ the actual focal spot size - Correct
Answer>>smaller than
Localized pitting or cracking on the anode can occur from - Correct
Answer>>a single excessive exposure
What makes up the external parts of the x-ray tube? - Correct
Answer>>support system, protective housing, and enclosure
What type of support systems are there? - Correct Answer>>floor to ceiling,
ceiling support system, c-arm
What makes up the internal components of the x-ray tube - Correct
Answer>>anode and cathode
What is the function of the protective housing of the x-ray tube? - Correct
Answer>>to limit leakage radiation
What should leakage radiation not exceed? - Correct Answer>>100 mR per
hour at 1 meter
What are the 2 principal parts of the cathode? - Correct Answer>>filament
and focusing cup
What is the function of the focusing cup? - Correct Answer>>To focus the
electron beam across the vacuum toward the target on the anode side of the
x-ray tube
, What is the function of the filament? - Correct Answer>>To boil off electrons
based on selections by rad tech
What is thermionic emission? - Correct Answer>>process of heating
filaments to incandescence causing electrons to boil off
Why is the glass envelope a vacuum on the inside - Correct Answer>>to
increase efficiency because nothing interferes with the electrons in tube
Most x-ray tubes are dual focus tubes. What does this mean? - Correct
Answer>>They have two focal spots: small and large
What is the difference between small and large focal spot - Correct
Answer>>Small focal spots boil off less electrons and give more detail, large
focal spots boil off more electrons and provide less detail
What is the function of the anode within the x-ray tube? - Correct
Answer>>Production of x-rays
Which parts make up the anode assembly? - Correct Answer>>target and
anode
What is the line-focus principle and how does it occur? - Correct
Answer>>Results in an effective focal spot size much less that the actual
focal size. The angle on the anode determines the size.
What is the anode-heel effect and how would it be utilized for certain exams?
- Correct Answer>>The way the effective focal spot comes off the anode,
causes the x-ray beam to have different intensities as it exits the tube. On
the anode side of the tube the beam has an intensity of 75% and the
cathode side is 120%, so when x-raying a patient, it is best to put the
thickest part of the patient on cathode side
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 chairmanmorris555. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
