Acute pulmonary embolism: role of helical CT in 164 patients with intermediate probability at ventilation-perfusion scintigraphy and normal results at Duplex US of the legs. - Ferretti,G.R.; Bosson,J.L.; Buffaz,P.D.; Ayanian,D.; Pison,Ch.; Blanc,F.; Carpentier,F.; Carpentier,P.; Coulomb,M. (Radiology, 1997)