( ( used ( in ( ( the treatment ) ( of ( kidney stones ) ) ) ) ) . )
(ROOT (S (VP (VBN used) (PP (IN in) (NP (NP (DT the) (NN treatment)) (PP (IN of) (NP (NN kidney) (NNS stones)))))) (. .)))
used in the treatment of kidney stones.
(ROOT (S (NP (DT The) (NN option) (S (VP (TO to) (VP (VB remove) (S (NP (NN kidney) (NNS stones)) (ADJP (JJ other) (PP (IN than) (NP (NN surgery))))))))) (VP (VBZ is) (NP (NN ultrasound) (NNS treatments))) (. .)))