Monica Test #1

The formula for heat units is:
HU= kVP x mA x t x c
The grid ratio for single plane is:
8:1
The grid ratio for biplane is:
12:1
The program must be set on ____ if it is not going to be used.
zero
This type of method is used to occlude a vessel:
embolization
With film in angiography, this type of equipment is required during the exposure:
intensifying screens
The most important consideration of biplane is:
control of scatter
The mode of action for automatic injectors is:
electro-mechanical
Steep target angles will affect:
detail
This will help reduce viscosity, maintain body temperature, & chemical activity:
heating devices on pressure injectors
Positive contrast agents are:
radiopaque with a high atomic number
Side holes on a catheter are positioned how?
asymmetrically
The number system used for catheters is:
inside diameter, outside diameter, length
3 French =
1 mm
Something that closes an opening is:
an obturator
This will operate the film changer, how many films, and how long each phase is.
A program selector
When the contrast is injected, it should be synchronized with this ECG wave.
R wave
Double barrel means:
two separate syringes that turn 180 degrees
Biphasic means:
Two separate injection flow rates in one procedure
Automatic injector must do this.
point downward to avoid air bubbles
Catheter holes are important because:
they help avoid “whip”
Catheter holes are important because:
they increase delivery rate by 10-20%
Catheter holes are important because:
they add stability to the tip
Negative contrast include:
carbon dioxide
Guide wires must…
be a minimum of 10 cm longer than the catheter
Pulsed digital fluoroscopy is similar to:
conventional serial radiography
Continuous digital radiography is similar to:
cineradiography
Temporal subtraction is often called:
the mask
Problems often occur on rapid film changers when opening and closing the intensifying screen causing:
too much air and this distortion
A name given to something by the person who first discovered it is:
an eponym
This type of subtraction is best to reduce motion artifacts:
energy
This type of subtraction is most commonly used:
Temporal
This type of subtraction is best able to switch kVp and filtration during exposures:
energy
Magnification will:
only enlarge an image
Primary lead barriers are required for:
bucky walls and floors
This is the amount of lead required for a primary wall:
1/16 in of lead
A rotating anode better distributes this:
heat
Special procedure anode tube angles are best at
10 degree angle
This factor is used for single phase generators:
one
This factor is used for 3 phase/ 6 pulse generators:
1.35
This factor is used for 3 phase/ 12 generators:
1.41
This factor is used for high frequency generators:
1.45
The old “roll film” could not utilize:
the last few feet of film
The state of being “sticky” in contrast medias is referred to as:
viscosity
Anion is the _______ portion os contrasts.
negative
Atomic # of lead
82
Atomic # of barium
56
Atomic # for iodine
53
Atomic # for fat
6.3
Atomic # for aluminum
13.0
Atomic # for air
7.6
Atomic # for muscle
7.4
Atomic # for nitrogen
7.0
Atomic # for bone
13.8
By coating a guide wire with this, it will be easier to insert:
heparin
Torque on a catheter is:
a twisting or turning of the catheter
To be able to see various shades of gray, it is called:
windowing
Uniform tissue density is called:
linear
If data is proportional to the signal strength, it is called:
logarithmic
A digital process that converts the image is called:
gray scaling
Geographic data assigned to an array in two dimensions is:
a raster line
This is a natural enzyme that can dissolve clots:
urokinase
An antagonist of a drug:
blocks that action of another drug
Most iodide contrasts have:
benzene