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September 1955

Experimental Ocular Effects of High-Voltage Radiation from the Betatron

Author Affiliations

Riverside, Calif.
From the Department of Ophthalmology of the University of Illinois College of Medicine. This study was made under a grant from the U. S. Public Health Service.

AMA Arch Ophthalmol. 1955;54(3):392-406. doi:10.1001/archopht.1955.00930020398011

The literature abounds with articles on the effects of ionizing radiation on the eye, beginning with Chalupecky1 in 1897, two years after Roentgen's discovery of x-rays. The present report is concerned with an investigation employing the 20,000,000 volt betatron by Kerst and co-workers,* of the University of Illinois. This apparatus possesses distinct advantages in the study of radiobiologic changes in the animal eye. It is capable of producing either an x-ray or an electron beam with depth-dose curves quite different than those for lower-voltage machines.

MATERIALS AND METHODS  For this study, 17 and 19 mev electrons and 23 mev x-rays were used. Figure 1 depicts the depth-dose curve for the 17 mev electron beam, showing that the surface dose is nearly maximum and remains so for the first 3 or 4 cm. Figure 2 gives the depth-dose curve for 25 mev x-rays, demonstrating the relatively low surface dosage and

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