STUDY ON COLOR X-RAY PHOTOGRAPHY

An Observation in Photography with X-Ray Films

[This corrects the article on p. 556 in vol. 87.].

X-ray photography of unerupted permanent teeth in congenital syphilis.

Changes in the permanent upper central incisors (Hutchinsonian teeth) and in the permanent first molars (Moon, 1877, 1884; Pfluger, 1924) are two of the most important stigmata of late congenital syphilis. These stigmata are not seen until the second dentition, in the incisors after about 7 years of age and in the molars after the 6th year. In radiographs however, Stokes and Gardner (1923) demo...

X-ray Photography of Mineral Accumulations in Plants.

The accumulation of mineral salts in plants has heretofore been demonstrated mainly by microchemical means, a method which is not always satisfactory for quantitative ends, since some of the minerals may be masked through organic combinations, and since the amount of color produced, in reactions dependent on colors, is not necessarily proportional to the amount of mineral present in the tissues...

Photography with Color-Coded Apertures

An in-vivo study on the energy dependence of X-ray biological effectiveness

Background: The International Commission on Radiological Protection (ICRP) has attributed the same relative risk for X and gamma radiations of all energies. Several studies have proven that the biological effect of low energy photon is more than that of higher ones. The assessment of risks is important due to the wide use of low energy X-rays for mammography screening and other diagnostic appli...