. The principles and practice of roentgenological technique . e back of a film. The eflfectis still further intensified if a double coated(Dupli-Tized) film is used, both sides of thelatter being covered by emulsion. The screen is more actively excited by med-ium and soft rays than by hard. To obtainthe maximum fluorescent eftect it is necessarythat a considerable percentage of the ray beabsorbed, and thus the short-waved x-raysare transformed into longer-waved actinicrays. The thicker the layer of tungstate inthe screen the better it is able to respond toharder rays. 7. The proper development
. The principles and practice of roentgenological technique . e back of a film. The eflfectis still further intensified if a double coated(Dupli-Tized) film is used, both sides of thelatter being covered by emulsion. The screen is more actively excited by med-ium and soft rays than by hard. To obtainthe maximum fluorescent eftect it is necessarythat a considerable percentage of the ray beabsorbed, and thus the short-waved x-raysare transformed into longer-waved actinicrays. The thicker the layer of tungstate inthe screen the better it is able to respond toharder rays. 7. The proper development of the screenplate (see development). CHAPTER XVIPOSTURES AND POSITIONS The plate )iiust be placed in proper contacticith and i)i proper relationship to the part tohe examined. The plate is placed with the smooth side ofthe envelope and therefore the sensitive sideof the plate against the part. The exceptionto this relationship is the arrangement whenthe screen is used, under which conditions theglass side of the plate is nearer the part to
Size: 1010px × 2475px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectradiogr, bookyear1920
