[thorox11]

I need help stating the relationship between KV and penetrability of the beam.

[hjhogle]

No no, we're not going that route.

Let's try it this way.

You tell me what you DO know about kvP and beam penetrability - we'll go from there.

hjh

[papa]

hjh-

can i use my whole Mack Truck analogy?

papa


_________________
papa RT(R)(CT)
Delusional Radiology
never meddle in the affairs of a dragon, for you are crunchy, and taste good with ketchup

[hjhogle]

Oooh, I like that! I'm looking forward to hearing this one

[papa]

a mack truck is traveling down the highway at 60 mph (60kVp). there's a farm truck carying chickens that has stalled in the middle of crossing the highway. when the mack truck hits the chickens, that's penatrability. it's how hard it hits.

now imagine that the mack truck is going 120 mph (120kVp), and there are 2 chicken trucks. a lot more chickens will fly, and the mack truck will go through the chicken trucks with less resistance.

increase in kVp = increase in penatrability.

now to look at mAs

i like cereal....

say that mack truck going 60 mph is carying 100 gallons of milk. when he hits the chickens, let's say that he penetrates the chicken truck and travels 100 feet. if that same truck stops and picks up another 100 gallons of milk, for a total of 200 gallons of milk, he'll travel 200 feet after hitting the chicken truck.

he's got the same "penatrability" as with the truck with 100 gallons of milk, but it takes longer for him to stop with 200 gallons. the more weight the truck has, the stronger the hit it will make.

increase in mAs = increase in dose, not penatrability.

mA = weight of the truck (gallons of milk)
s = distance traveled after hitting chicken truck

the overall goal in radiology is to have a well ballanced breakfast, with scrambled eggs and milk, and not a big mess to clean up afterwards.

papa

"I'm the red ball express of lovin'
Diesel-powered straight to you, I'm truckin'
In old Temptation's rain, I'm duckin'
For your love through sleet and snow, I'm truckin'

Ain't nothin' holdin' me back nothin'
I'll keep right on, right on truckin'"

had to.....
_________________
papa RT(R)(CT)
Delusional Radiology
never meddle in the affairs of a dragon, for you are crunchy, and taste good with ketchup

[hjhogle]

You, sir .. are amazing Quite a combination ... The voice of Eddie Kendricks and the comic art of Robert Crumb. Aaah, The Old Days

hjh

[papa]

hey, i wonder if i could get that published in a book somewhere......



papa

ok, yeah, that's how young i am.......
i had to google robert crumb
_________________
papa RT(R)(CT)
Delusional Radiology
never meddle in the affairs of a dragon, for you are crunchy, and taste good with ketchup