Index 



293 



Volume of a brain region, changes 

 in, 75 



w 



Wall effect of the ionization cham- 

 ber. 181 . . 

 Water, decomposition by radiation, 



122 

 Water-phantom measurements, 



228 

 Wedge fields of irradiation. 223 

 —filter, isodose curves modified by, 



223, 224 

 — filters. 208 



X-radiation and gamma radiation, 

 1^77 



X-ray diffraction analysis, 19 



— dose, rontgen unit of. 180 



— equipment, high voltage, 243 



^ relation of dominant lethals to 



dose of. 143 



— technique. 261 



therapy, technical methods in, 



216 



— tube, million volt, 244. 246 

 X-rays, advantages of million-volt, 



256 . 



— , effect on blood concentration of 

 ascorbic acid. 213 



^ inactivation of viruses in aque- 

 ous suspension by, 157 



—.neutrons and other ionizing 

 radiations, biological effects of, 



114 

 — , sterilizing effects of. 95 



