Download A Guide to Medical Photography by Dietmar Hund (auth.), Dr. Peter Hansell (eds.) PDF
By Dietmar Hund (auth.), Dr. Peter Hansell (eds.)
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Extra info for A Guide to Medical Photography
Example text
Intra-corporeal flash, good illumination of detail. View through a 135' lens system. 51 Gastro-intestinal photo-endoscopy a b 69. a: View through a misted-up lens; b: View through a cleaned lens. picture it is recommended that the laparoscope be checked in front of a dark background for the presence of distinct specks of dirt. 3 Photographic technique The cameras that are used in laparoscopy have no ground glass screens for sharp focusing; instead they have aerial focusing aids in the form of cross-wires, engraved circles or grids.
85. As Fig . 84, but in the form of a 4 x 4cm slide: the advantage of increased area and better resolution can be seen. we use flash exclusively in the operating theatre, any system of exposure metering is of no great significance. multiplicity of types of lenses, the use of supplementary lenses or extension tubes is decisive in determining the quality of the picture. Depending on the lens used, it may A ground -glass screen is of particular importance in surgical photography. Focusing with microprisms or split image rangefinders is much too uncertain and is virtually useless in any operation in which organs move.
43. Same eye as in Fig. 42, but as a colour fluorescein angiogram. Photos: Susanne Exinger Photography in otola ryngology 35 3. Photography in otolaryngology By Per-G. 01 Introduction raphy is done in the clinic. This type of photography can seldom be performed under standardised conditions; thus a ring-flash is usually used as the main light source. The usual camera is a Hasselblad 500 with a 120 mm lens and a proxar lens or an extension tube. When 35 mm slides are wanted directly, a Nikon F camera together with a Medical-Nikkor lens has been used for many years with very good results.