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Radiology Student Chat Zone :: Question for wvaio

November 1, 2009 on 5:32 am | In Uncategorized | Author: traineetech
SubjectQuestion for wvaio
Posted: Tue Oct 27, 2009 3:44 pm (GMT -4)
Topic Replies: 3

Hi, wvaio, you helped me out a little before about ionisation chambers, but I am still a little confued, so wondered if you can help me out.

First question:

I think what I'm confused with is the actual definition of a bucky. Is the bucky the same thing as the grid or are they two separate things? I get confused with people at placement saying out of bucky or out of grid etc...

I thought that the word bucky was just another name for a grid, but maybe I'm wrong? Or is the word bucky just another name for the ionization chambers?

I know what a grid is (an anti scatter device) but I thought that if you're using a grid, you're automatically using a bucky, but maybe I'm wrong here. Could you clear this up for me?

Second question:

At placement we use both digital radiography and CR.

Say you did a chest X-Ray using CR with no AEC, with 96kV and 3.5mAs - Is it the ionization chambers' job to detect when 3.5mAS has been used up before termination the exposure or have I got that wrong?

IE, what is the difference betwween an ionization chamber and an automatic exposure device? Do AED's have ionzation chambers?

Just confused here, and could do with some help

Thanks and hope you can help