. The Röntgen rays in medical work . Fig. 40. Dr. Hedleys combined localizer and vacuum-tube-holder is a modification of Mr. Mackenzie Davidsons apparatus. It serves a double purpose, and is designed with a view to portability and simplicity. It consists of an upright steel bar screwed into a collapsible tripod stand, and carrying a shifting horizontal bar made of wood and graduated, and armed with a travelling clamp that grips the focus tube. A wire cross dipped in an aniline dye is laid on the plate to mark the patients skin, and the path of the rays is traced by silk threads attached to the
. The Röntgen rays in medical work . Fig. 40. Dr. Hedleys combined localizer and vacuum-tube-holder is a modification of Mr. Mackenzie Davidsons apparatus. It serves a double purpose, and is designed with a view to portability and simplicity. It consists of an upright steel bar screwed into a collapsible tripod stand, and carrying a shifting horizontal bar made of wood and graduated, and armed with a travelling clamp that grips the focus tube. A wire cross dipped in an aniline dye is laid on the plate to mark the patients skin, and the path of the rays is traced by silk threads attached to the scale at points corresponding with the focus tube during the two exposures and carried down to the images on the developed plate, where they * The apparatus is made by Messrs. Curry and Paxton, of Great PortlandStreet, London, W. It is kept in two sizes,t Scottish Medical and Surgical Journal, April, Fig. 41.—Three Bullets in Head of a Cadaver; One in Neck; reduced- about one-third. MEDICAL AND SURGICAL APPLICATIONS 97 are fixed by small weights. The point of intersection of thethreads marks the position of the foreign body. Mr. Hall-Edwards has a good localizer, in which a chequeredgrid lies fiat over the sensitive plate and beneath the shiftingtube. In America the Dennis Fluorometer is in vogue. Itconsists of an upright grid attached to an operating table, andwas used exclusively in the recent Cuban war, where it wasfound to work rapidly and well, especially in screen-localization. Foreign Bodies in Brain By the kindness of Mr. Davidson the writer has been enabledto reproduce the accompanying illustration (Fig. 41), showingbullets artificially introduced into the head and neck of a from above downwards, the round ball at the topwas placed in the right frontal lobe of the brain, and the conicalbullet next to it also inside the brain, close to the right pariet
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrad, booksubjectxrays
