Multisection^W contrast IV && Multisection^WO & W contrast IV:Find:Pt:Head && Neck:Doc:CT.angio && CT.angio
multisection^w contrast iv && multisection^wo & w contrast iv:find:pt:head && neck:doc:ct.angio && ct.angio
CTA Head W contrast and CTA Neck WO and W contrast IV
cta head w contrast and cta neck wo and w contrast iv