POSSIBILITIES OF SHIELDING OF SENSITIVE PORTIONS OF THE EYE DURING BETA IRRADIATION (Sr$sup 90$)

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Radiobiol. Radiotherap.

OSTI ID:4159045

Vollmar, R

A small adhesive glass capsule with a removable 0.5-mm thick layer of Pb is used for protection of the sensitive portions of the eye (cornea, lens, etc.) during Sr/sup 90/ BETA irradiation. The capsule need not be fitted optically to the eye surface. Bremstrahlung from the Pb amounts to less than 1% of the 500- r single dose applied during 25 sec with a 40 mC/cm/sup 2/ applicator. Radiation losses between the applicator and the eye surface are minimal. The method has been used to reduce vascular invasion of the cornea and cloudiness of transplants, marginal ulcerations in senile degeneration, chronic lymphocytic conjunctival hyperplasia, growing conjunctival nevus in children, and conjunctival melanoma. A combined treatment of the conjunctival bulba and tarsi was used for diseased conditions such as chronic lymphocytic conjunctival hyperplasia or laminar melanosis of the conjunctiva. Large capsules with portions of the edges removed are utilized for segmental irradiation of pterygium to avoid damage and appearance of late radiation effects in other portions of the eye. A large assortment of eye capsules is necessary to provide for the wide variety of sizes of individual conjunctiva. Use of eye capsules avoids damage to the lens that may otherwise receive as much as 10% of the surface beta dosage. This could bring about cataract formation as a later radiation injury. (BBB)

• Research Organization: Humboldt Universitat, Berlin
• NSA Number: NSA-18-005198
• OSTI ID: 4159045
• Journal Information: Radiobiol. Radiotherap., Journal Name: Radiobiol. Radiotherap. Vol. Vol: 3
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

AGE
BETA DECAY
BIOLOGY AND MEDICINE
BLOOD CIRCULATION
BONES
BREMSSTRAHLUNG
CATARACTS
CORNEA
DISEASES
EYES
GLASS
INSTRUMENTS
LEAD
LENSES
LOSSES
LYMPHOCYTES
MAN
MELANOMAS
NERVES
RADIATION DOSES
RADIATION EFFECTS
RADIOTHERAPY
SHIELDING
STRONTIUM 90
SURFACES
THICKNESS
TISSUES
TRANSPLANTS
TUMORS
ULCERATIONS
VARIATIONS
VOLUME