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Dr. Bucky has long been recognized as a leading authority on x-rays, and both he and Dr. Combes have had much experience with the ultra soft rays known as grenz rays. They have called to their assistance seven other authorities to produce this valuable text. The development of grenz ray therapy and the difficulties encountered are briefly described. The invention of the Coolidge tube and the ionization chamber made it possible to control the quality and quantity of rays but many later improvements have much enhanced the safety and accuracy of the x-ray machine. Attempts to obtain rays up to 15 Å have ceased and the present machine produce rays of about 2 A at 15 volts.
Glasser and Steinitz with the aid of diagrams and charts explain the physics and technique of grenz ray therapy. Bucky writes of ionization in biologic materials and of gross skin manifestations, while Goldzieher
Grenz Ray Therapy: Principles, Methods, Clinical Applications. JAMA. 1954;156(5):572. doi:10.1001/jama.1954.02950050112039
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