Gary why were your CT's not done with contrast? It seems they prefer it.

My Dad had his without (his choice) however the tech preferred contrast. This time he did the contrast.

Also anyone know; if you have one without contrast and then the followling scan is done with contrast, when they do a comparison, does that matter? how does that differ? ie; if things are clearer with contrast then do they measure up larger or smaller? (hard to type what I'm saying ha; but hope it makes sense. Can't seem to find that info online).

Thanks,