Dosage tables for Röntgen therapy / by Friedrich Voltz ; translated from the second German edition.

  • Voltz, Friedrich, 1891-1938.
Date:
1928
Catalogue details

Licence: In copyright

Credit: Dosage tables for Röntgen therapy / by Friedrich Voltz ; translated from the second German edition. Source: Wellcome Collection.

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    PREFACE TO THE SECOND GERMAN EDITION Seven years have elapsed since the first edition of my Dosage Tables appeared. During that time X-ray therapy has de¬ veloped considerably, especially on the technical side. The apparatus and tubes have become more powerful, methods of measuring have been much improved, and the technique of irradiation has undergone many modifications. The form of the second edition, therefore, shows a radical change from that of the first: many of the sections are new, and many of the existing ones have had to be rewritten, but the general struc¬ ture of the book has not been altered. Its object remains the same, namely to assist the practical radiologist to estimate dosage without the necessity for long measurements and re¬ peated calculations. It is not a ‘ prescription book ’; it is directed entirely towards the estimation of physical quantities. This estimation is necessary and will remain so, for whatever stress is laid upon biological factors it must always be remem¬ bered that the biological effect of X-rays can only be ascertained quantitatively by means of physical constants. FRIEDRICH VOLTZ. Munich, April 1928.