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JENNIFER HODGES
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What is the most insensitive?
CNS
What is the increase in brightness by acceleration of the electron in the image intensifier?
Flux Gain
Flux=Movement
What is the relationship between mAs and Density?
Reciprocity Law
What are the grid conversion factors?
5:1=3
8:1=4
12:1=5
16:1=6
What interaction does not cause ionization?
Coherent
What does increasing the filtration do to contrast?
Deacreases Contrast
The smaller the Intensifying Phosphors the?
Better the recorded detail
What bone has no body?
Atlas?
What converts x-ray energy into light?
Input Phosphor
How often are crossover racks cleaned?
Twice daily
What is X-Ray tube current measured in?
Milliamps
What chemical slows oxidation?
Preservatives
How do you figure the Heat Unit (HU) for single phase equipment?
mAs*kVp
How do you figure the Heat Unit (HU) for triple phase six pulse?
mAs*kVp*1.35
How do you figure the Heat Unit (HU) for triple phase 12 pulse?
mAs*kVp*1.41
What voltage ripple does a single phase have?
100%
What voltage ripple does a triple phase six pulse have?
13%
What voltage ripple does a triple phase twelve pulse have?
4%
What voltage ripple does a high frequency generator have?
1%
Where is high contrast films plotted?
On the left
What interaction results in differential absorption?
Photoelectric effect
When is exposure lattitude the narrowest?
At lower kVp levels
What photon tissue interaction that produces scatter and leaves the patient?
Compton
WHat is the factor that is expressed as the ratio of primary radiation through the rid to secondary radiation transmitted through the grid?
Grid Selectivity
How sensitive is the OSL monitor?
1mrem
How sensitive is the TLD monitor?
5mrem
What is a compound smallest unit?
Molecule
As kVp increases a greatest potential difference exsist between what?
Anode and Cathode
What part of the stomach is most proximal?
Cardia
How do trough filters work?
Thinner at Center and Thicker at Edges
What do x-ray photons not have?
Charge
Mass
What is plotted on the y-axis of the H&D curve?
Density
What is plotted on the X-Axis of the H&D curve?
Exposure
What interaction occurs when an incident photon strikes a k-shell electron?
Photoelectric
What happens when a patient takes a deep breath?
The diaphragm contracts and the dome moves down
What is the grid error with density deacreased across the entire film?
Off-level grid
What is the grid error tgat shows normal density in the middle but decreased density on the sides?
Upside down grid
What is the purpose of the sensitivity specks?
Serves as cneters for making the visible image
What is not an organelle?
Nucleus
What is the annula effective dose for natural background radiation?
295mrem
What is the symbol for the atomic mass?
A
What is the dose at tabletop for fluoro?
10R/Minute
What interaction results from very low energy?
Coherent
What happens as filtration increases?
Contrast Decreases
What abdominal structure is not an accessory digestive organ?
Spleen(Part of the Lymphatic System)
What is the relationship between kVp and Density?
Direct but not proportional
What are the lower risk levels for embryo-fetus?
15-20Rad
What is the Example of low LET?
X-rays
what is an example High LET?
Alpha, Neutrons, and radioactive Fallout
What does slower film screen speed do?
Increases definition
What does faster speed screen do?
Decrease Sharpness
What do slower film screen speed demonstrate?
Higher Patient dose
What organ is responsible for radiation induced leukemia?
Bone Marrow
Where is the CR for lateral projection of the sinuses?
0.5-1.0 posterior to outer canthus
What is the unit of radiation that takes into account different biologic effects caused by different types of radiation?
REM
Where is the pylorus located?
Narrow Distal end that connects with the small intestine (G)
Author
JenniferHodges
ID
84890
Card Set
JENNIFER HODGES
Description
JENNIFER HODGES
Updated
2011-05-10T01:06:50Z
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