Handbook of computed tomography x-ray spectra. Final report

This handbook presents typical primary x-ray spectra, as well as spectra which were obtained after transmission through water and lucite phantoms. Both types were obtained under good geometry conditions. These data were accumulated from four x-ray tubes under conditions that should simulate spectra encountered with current CT usage. Descriptive information is presented that should be helpful to the x-ray spectroscopist and that should aid the user in selecting the spectra that are most applicable to his condition. A discussion of the numerical data included in this handbook is presented. Graphic displays of incident exposure rates (mR/mAs at 1 meter) for some typical x-ray beams are presented and the data format used in this handbook is described. Appendix B contains numerical tabulations of the CT spectra.