Editing CUA: Ureteral Calculi (2015) (section)

== Other factors (than stone size and location) affecting SWL treatment success ==

* '''Composition''': '''calcium oxalate will fragment well;''' '''cystine, calcium oxolate monohydrate, and brushite are more resistant to SWL.''' Uric acid stones are fragile but cannot be localized for SWL targeting
* '''Density''' '''(surrogate of composition):''' Linear relationship, poor stone fragmentation '''> 1000 HU''' (best to maximally magnify stone, use bone windows, and draw ellipse)
* '''Skin to stone distance: more likely to fail with skin to stone distance >10cm'''