Hand exercise during contrast medium delivery at thoracic helical CT: a simple method to minimize perivenous artifact.

PurposeThe purpose of this work was to assess the effects of hand exercise on perivenous artifact caused by undiluted venous contrast material at thoracic helical CT.MethodEighty patients were prospectively and randomly assigned to thoracic helical CT with (n = 42) or without (n = 38) intermittent s