Talk:Dose area product

"DAP is expressed in Sievert square centimetres (Gy*cm²)[1] (sometimes mGy*cm² or cGy*cm²)." - not sure what this means. The sievert and the gray are similar, but not exactly the same. Which is this? The units do not match the words. MergatroidGonzales (talk) 19:26, 22 December 2010 (UTC)MergatroidGonzales