mAs and kVp EXPOSURE class

lucky_yooh07 · Joined: 26 Jan 2009 Posts: 12

Does anyone know any helpful hints or tips that could help me out in exposure? The mAs and kVp havent exactly clicked with me yet, so if someone could explain them to me in english that would be great! My first test is friday! AHHHHH! Crying or Very sad

wvaio · Joined: 22 Sep 2007 Posts: 82

Here is another thread that may help:
http://www.radiologyworkers.com/radiologyforums/viewtopic.php?t=5271&start=0&postdays=0&postorder=asc&highlight=

papa · Posted: Tue Jan 27, 2009 10:35 am Post subject:

so, they can be taught? ;P

good job wvaio. so you get it now?
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papa RT(R)(CT) Mr. Green

Delusional Radiology
never meddle in the affairs of a dragon, for you are crunchy, and taste good with ketchup

lucky_yooh07 · Joined: 26 Jan 2009 Posts: 12

I am kind of grasping the concept alot better! The thread you sent me really helped so thanks alot! I would love some more help if anyone could offer any tips or hints on the easiest way to understand this stuff. I am a very visual learner and do quite well with learning if i can see it! Laughing

wvaio · Joined: 22 Sep 2007 Posts: 82

Two things that must be understood about kVp and mAs are quality and quantity.
kVp is the quality of the beam. The power of the available x-rays. This power is established by the potential difference between the cathode and the anode. The more power that is applied to the anode, the faster the electrons will accelerate from the cathode.

mAs is the quantity of electrons available at the cathode (over a given time). So the higher the mAs the more total xrays that can be produced.

Imagine kVp as a bow and arrow. The further you pull the arrow back on the bow, the further into a bale of hay the arrow will go. mAs would be the number of bows and arrows that you have shooting. The more mAs you add the more people shooting arrows.

lucky_yooh07 · Joined: 26 Jan 2009 Posts: 12

Thanks alot for helping me out! IT really did help alot!