ANGIOGRAPHY IN DIRECT FOUR TIMES MAGNIFICATION APPLIED TO FIELD OF OPHTHALMOLOGY.

Abstract

Serial enlargement roentgenography was conducted 2 and 5 seconds after injection of 76% Urografin into the carotid artery of rabbits under the exposure condition of 125kVp, 2mA, 0.05 seconds and focus film distance of 100cm. On the enlargement roentgenogram fine structure of the ophthalmic artery of the rabbit was imaged as linear crescent shadow due to contrast filling of the choroidal plexus, linear shadow of the long and short ciliary branches, comb-shaped shadow of irial vessels and sigmoid-shaped shadow of the vorticosal veins. Each of shadow has been difficult to be imaged on the existing normal roentgenogram. The enlargement roentgenography was then applied clinically to eight patients having a foreign body in the orbit and a patient of the retinal tumor. The exposure factor was of 125kVp, 2mA, 0.6-0.9 seconds and focus film distance of 100cm. The quality of the image was similar to that of the rabbits. As crescent shadow of the choroidal plexus was imaged in all the cases, it became possible to us to establish the correct diagnosis of the location of the foreign body, extraocular or retroocular, by changing the direction of roentgen beams. As for retinal tumor the image of the so-called tumor stain was visualized as a fine net-work.