In-phantom spectrometry of medical diagnostic x rays

Abstract

T his report wao prepared as an accou11l ur work sponsored by tne Un 1ted States Government. Neither the Un ited States nor the Energy Research and Development Adm inistration/ Un ited States Nuclear Regulatory Comm ission , nor any of their employees, nor any of the ir contractors, subcu11ln:tc..;lors, or their employees, makes any warranty. exprP.ss nr imrli.,.d , or assumes any legal liabil ity or responsib ility fof th~:~ accuracy, completeness or usefulness of IIIW information. nflfliUFttlls. rrnrl11rt or process disclosed, or represents that its use would not infringe privately owned rights.

Evaluation of the distribution of absorbed dose in child phantoms exposed to diagnostic medical x rays

“…In bone, the hardening effect dominates. However, the rad/R conversion factor decreases from 4.4 to 4.0 for a change in the effective energy from 30 keV to 40 keV (Koren, 1974;Stansbury, 1977). If an average rad/R conversion factor of 4.…”

“…Installation and calibration of an x-ray machine for use in this study. The machine was designed previously (Stansbury, 1977).…”

“…In order to do x-ray spectrometry inside the phantom, an x-ray machine of a special design was constructed by Stansbury (1977). This x-ray machine was able to operate over the range of 10 ~A to 20 rnA.…”

“…Due to the small body size and volume of young children, a large portion of their total body is exposed to radiation beams that would cover only a· small area in the adult. Therefore, confining (Stansbury, 1977).…”