RAD PHYSICS FINAL STUDY GUIDE EXAM QUESTIONS & ANSWERS 2024
3 views 0 purchase
Module
RAD PHYSICS
Institution
RAD PHYSICS
RAD PHYSICS FINAL STUDY GUIDE EXAM QUESTIONS & ANSWERS 2024
Excessive anode heating can cause evaporation of tungsten that is deposited on the port window. This can result in:
1. Decreased tube output
2. Tube failure
3. Electrical arcing - ANSWERS1, 2, and 3
To determine how quickly an x...
RAD PHYSICS FINAL STUDY GUIDE
EXAM QUESTIONS & ANSWERS 2024
Excessive anode heating can cause evaporation of tungsten that is deposited on the port window. This
can result in:
1. Decreased tube output
2. Tube failure
3. Electrical arcing - ANSWERS1, 2, and 3
To determine how quickly an x-ray tube will disperse its accumulated heat, the radiographer uses a(n): -
ANSWERSAnode cooling curve
Which of the following formulas would a radiographer use to determine the total number of heat units
produced in a given exposure using a single-phase x-ray unit? - ANSWERSmA x time x kVp
The half-value layer of an x-ray beam indicates: - ANSWERSbeam quality
The radiation produced at very discrete energies of approximately 69 keV when electrons interact with
the K-shell of the tungsten target atoms is called? - ANSWERScharacteristic
When the kVp is increased, x-ray quantity: - ANSWERSalso increases
How many half-value layers would be required to reduce a beam intensity of 342 mR to 43 mR? -
ANSWERS3
Radiation that passes through the tube housing in the directions other than the useful beam is termed: -
ANSWERSLeakage radiation
What is the minimum amount of total filtration required when an x-ray tube is operating at 70 kVp? -
ANSWERS2.5 mm aluminum
,What type of device would increase the diagnostic quality of a radiograph of the dorsoplantar projection
of the foot? - ANSWERSwedge filter
What combination of exposure factors results in the highest quantity x-ray beam? - ANSWERS96 kVp and
2.5 mm Al filtration
Which of the following transitions would result in production of the highest energy characteristic x-ray? -
ANSWERSO shell to K shell
The type(s) of radiation produced in the target is (are):
I. Photoelectric
II. Characteristic
III. Bremsstrahlung - ANSWERSII and III
Anode angle will have an effect on the:
1. Severity of the anode heel effect
2. Effective focal spot size
3. Spatial resolution - ANSWERS1, 2, AND 3
Which of the following occurs during bremsstrahlung radiation production? - ANSWERSAn electron
approaching a positive nuclear charge changes direction and loses energy.
Which of the following constitutes the largest portion of the x-ray beam emerging from the target? -
ANSWERSBremsstrahlung
Which of the following will serve to increase the average energy of the x-ray beam?
1. Increase in added filtration
2. Increase in kilovoltage
3. Increase in milliamperage - ANSWERS1 and 2
, Tungsten alloy is the usual choice for the anode target material of radiographic equipment because it:
1. Has a high atomic number
2. Has a high melting point
3. Can readily dissipate heat - ANSWERS1, 2, and 3
What is the advantage of the rotating anode over the stationary anode? - ANSWERSGreater heat-loading
capacity
Filters used in x-ray tubes are generally made of: - ANSWERSAluminum
The federal standard for leakage radiation from an x-ray tube housing is: - ANSWERSLess than 1mGy/h at
1 meter
When projectile electrons from a filament enters a target atom and interacts with the nuclear force field,
it will: - ANSWERSdecrease velocity
The area under the x-ray emission spectrum best represents: - ANSWERSThe total number of photons
emitted
The primary purpose of adding filtration to a diagnostic x-ray beam is to? - ANSWERSRemove low energy
photons
Which of the following will affect both the quantity and quality of the primary beam?
A. HVL
B. kVp
C. mAs - ANSWERSB only
The life of a x-ray tube can be extended by:
1. Not exceeding the tube limit for individual exposures
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 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 Bensuda. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £7.67. You're not tied to anything after your purchase.
