The tech who did my mammogram screening was a bit "aggressive " getting me into proper position. While I do realize these are difficult angles to be positioned in I did inform her prior that I had a "bad" shoulder and my range of motion on one side wasn't great and I was a bit concerned if I could hold that position. That being said I would have expected a gentler approach with that side. She was just very matter of fact and could've been more cautious getting comfortable. 
Mammo SL