. The American journal of roentgenology, radium therapy and nuclear medicine . hradium is incorrect, as the secondary andscattered rays arising in the tissues and thegeometrical form of the radium capsuleshave not been taken into account in suchcalculations. (2) The value of the secondaryradiation is so great that it not only equalsthe loss by absorption, but results inhigher values for the total dose. (3) Thecurves of equal intensities, designatedisodoses, do not take a course parallelto the circumference of the radium capsule,but evince a course deviating quitemarkedly from that of the surfa
. The American journal of roentgenology, radium therapy and nuclear medicine . hradium is incorrect, as the secondary andscattered rays arising in the tissues and thegeometrical form of the radium capsuleshave not been taken into account in suchcalculations. (2) The value of the secondaryradiation is so great that it not only equalsthe loss by absorption, but results inhigher values for the total dose. (3) Thecurves of equal intensities, designatedisodoses, do not take a course parallelto the circumference of the radium capsule,but evince a course deviating quitemarkedly from that of the surface of thecapsule. The capsules furnished by Americanpurveyors of radium have a differentfrom those employed byI riedrich and Glasser in their investiga-tions. Therefore it appeared advisable todetermine the equal intensity curves ofsome of the radium capsules in my posses- • Read at the Seventh Annual Meeting of Th sion. The results of these labors carriedon in association with Huth2 are shown inFigure 1. Knowing the equal intensitycurves, it became necessary to determine. Equal intensity curves of JO mgm. element. the time duration of the application of the50 mgm. of radium element arranged andscreened, as seen in Figure 1, to determinethe biological unit of dose. For thispurpose we chose the isodoses 60, 40, 20, 10 .-. Radium Society, St. Lours, May 22 23, 192a. Technique and Statistics in the Treatment of Carcinoma of the Uterus 663 Tl
Size: 1556px × 1605px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoramerican, bookcentury1900, bookdecade1900, bookyear1906
