Mask for viewing reduced-size radiographic film, particularly mammography film
摘要
A radiographic film mask includes a planar sheet sized for receipt on an illuminated radiographic film examination box. The mask has two opaque sections and a transparent section. The transparent section is disposed on the sheet between the two opaque sections to form a radiographic film viewing area which has an area less than the entire area of the sheet. The sheet may include semi-transparent sections which border the viewing area and interconnect the opaque portions to provide reduced transmission of light along the marginal edges of the radiographic film.
申请公布号
US5818624(A)
申请公布日期
1998.10.06
申请号
US19950579298
申请日期
1995.12.27
申请人
PATTERSON, JOHN;STURGIS, RAYNOR;WALBORN, HUGH;WILHELM, LAWRENCE
发明人
PATTERSON, JOHN;STURGIS, RAYNOR;WALBORN, HUGH;WILHELM, LAWRENCE