Clinical and imaging manifestations of primary cardiac angiosarcoma.

Background: To investigate the CT manifestations of primary cardiac angiosarcoma.

Methods: The clinical and CT data for 9 patients with cardiac angiosarcoma were retrospectively analyzed.

Results: The lesions in all nine cases were located in the right atrium.

Rectification inversion in oxygen substituted graphyne-graphene-based heterojunctions.

Current rectification is found in oxygen-substituted zigzag graphyne nanoribbon/hydrogen-terminated zigzag graphene nanoribbon heterostructure junctions, from the application of nonequilibrium Green's function formalism combined with density functional theory. This behavior could be tuned by varying the number and location of oxygen atoms in the zigzag graphyne nanoribbon parts, and the rectification direction could be reversed due to the parity limitation tunneling effect. Moreover, an obvious negative differential resistance behavior is found and may be explained by two different mechanisms.