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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    c. If we consider three absorbers of identical dimensions but made of aluminium (atomic weight 27), sulphur[(atomic weight 32), and iron (atomic weight 56), shown in Fig. 4 at A2, and A 2 respectively, and if we assume the same composition of the Fig- 4- rays, then will absorb less than A 2, and A 2 less than .43. If and J2 are measured in these cases we have \ < (71-/2) ^ < (7i“72) ^ • • (^°) •T1 -^2 ^3 The increase in absorption is regular; it follows the order of the chemical elements in the table of atomic weights. 3. Scattering. If a beam of X-rays traverse a body, a part of the rays is scattered; the actual amount of scattering depends on the volume of the body. Scattering of X-rays is of the greatest importance in X-ray therapy. It plays the more important role, the shorter the