Need translation of kidney CT

I think I posted this in the wrong forum earlier - I thought I was posting it where a doctor would answer.

These are some excerpts of the CT of my kidneys that I had last Friday. I need to know if hydro' means hydronephrosis of kidney, and if hte hydronephrosis refers to swelling of the kidney or of the ureter (the stone was only 2 mm on passing and measuring it), and what is punctate stone or punctate calcification. (Google isn't doing much for me on the definition of that one as all I can find is people asking in places like Yahoo Questions and getting weird adn vague answers.)

Kidneys: The right kidney is without contour abnormality or stones. There is mild right hydro' and a 3 mm stone in the distal right ureter near the bladder. The left kidney has a punctate stone in an upper pole calix. No contour abnormalities or abnormal density. There is no hydronephrosis and no stone in the left ureter.

Impression:
1. 3 mm stone in the distal right ureter, at the level of the trigone with mild hydronephrosis.
2. Punctate calcification present in a mid pole calix of the left kidney.

Also, can the radiologist tell that whatever is going on in the left kidney is calcium and not a different mineral? When calculi means kidney stone, it is not easy to discern whether calcification means there is calcium.

Thanks!

Dora Smith