MISC
The type of radiation that forms the image- The photons are absorbed in the patient
What is a photoelectric interaction?
I control the ability to send a signal to the IR
What is kVp
to improve resoulution you want this type of SID
What is a long SID
What is the new mAs if you half the mA
100 mA at 1 sec = 100 mAs
What is 1/2 or 50
The tube interactions are
What are characteristic and bremsstrahlung
Most of scatter comes from this interaction
What is a Compton interaction?
To double the exposure to the IR increase by:
What is 15 %
To magnify the part you would
What is increase OID or decrease SID
mAs controls this
What is exposure or brightness
The interaction that comes when k-shell electron of the target is knocked out that results in a x-ray photon
What is characteristic interaction
If you want to improve spatial resolution you will select me on the control panel
What is small focal spot
An image with lots of shades of gray with little difference between them has this type of subject contrast
What is low subject contrast
To view your image (visability) you need the correct amount of:
What is kVp and mAs
this is the best way to reduce chances of motion
What is use the lowest time
The interaction that causes scatter
What is compton
If you want to reduce magnification you better reduce me!
What is OID
kVp has what relationship with penetrability of the beam
What is direct
The amount of mAs change used for every 4cm of thickness increase.
What is multiply by 2
my mA is 200 my time is .5 to increase the exposure by increasing mA only what mA should be used?
What is 400?
The interaction that produced an area of brightness on the image
What is photoelectric
If you do this to kVp you will reduce scatter:
What is lowering kVp?
If you want to increase the transmission of the primary beam you would do this to me
What is increase
to have blurred edges is aka
What is penumbra
This is always used to reduce patient dose
What is use lowest mAs possible?
The most common interaction in the tube
What is bremsstrahlung.