title: Thrombus size and vein obstruction related to impedance phlebography.
mesh_terms: D005188:False Negative Reactions; D006801:Humans; D007866:Leg / Q000098:blood supply*; D010690:Phlebography / Q000379:methods; D010992:Plethysmography, Impedance / Q000379:methods*; D011877:Radionuclide Imaging; D013924:Thrombophlebitis / Q000145:classification / Q000175:diagnosis* / Q000000981:diagnostic imaging