Disclosed herein is an article and
thermoplastic composition comprising a polysiloxane-
polycarbonate, optionally, a
polycarbonate, and an X-
ray contrast agent comprising X-
ray scattering atoms having an
atomic number of greater than or equal to 22, wherein an article molded from the
thermoplastic composition and having a thickness of 3.2 mm has a notched Izod
impact (NII) strength of greater than or equal to about 620 J / m, when measured at a temperature of 0° C. according to ASTM D256-04, or a notched Izod
impact strength of greater than or equal to about 409 J / m, when measured at a temperature of −30° C. according to ASTM D256-04, wherein an article molded from the
thermoplastic composition and having a thickness of 3.2 mm has an Equivalent Al Thickness of greater than 0.51 mm, when irradiated with 50 kV X-
ray radiation, and wherein for melt volume rates of the thermoplastic composition determined under a load of 1.2 kg at a temperature of 300° C. according to ASTM D1238-04, a melt
volume rate measured at a dwell time of 18 minutes increases relative to a melt
volume rate measured at a dwell time of 6 minutes by less than or equal to 31%. A method of improving X-ray contrast in a
polycarbonate composition, and specific articles are also disclosed.