Head CT negative for acute bleed or mass.
 Head CT showed hemorrhage 
(ROOT (S (VP (VB Head) (NP (NP (NNP CT)) (ADJP (JJ negative) (PP (IN for) (NP (JJ acute) (NP (VB bleed) (CC or) (NP (NN mass)))))))) (. .)))
(ROOT (SINV (VP (VB Head) (NP (NN CT))) (VP (VBD showed)) (VP (NN hemorrhage))))
( ( Head ( CT ( negative ( for ( acute ( ( bleed or ) mass ) ) ) ) ) ) . )
( ( ( Head CT ) showed ) hemorrhage )