Spectral characterization of 4 MV Bremsstrahlung by attenuation analysis
Journal Article
·
· Med. Phys.; (United States)
The quality of radiation for a high energy x-ray beam can be specified by its attenuation curve in a selected material. The inverse Laplace transform of the attenuation curve can be used as an approximate indication of the energy spectrum of the beam. Existing mathematical procedures for this purpose have been evaluated and were found to poorly represent measured transmission data for 4 MV x-rays from a linear accelerator. The transmission data between 1 and 0.002 could be fitted within the experimental uncertainty by expressing the logarithmic transmission as a second order polynomial of attenuator thickness. The inverse Laplace transform them becomes a Gaussian function of the attenuation coefficient. This new version of attenuation analysis provides a practical method for specification of the quality of the radiation in this energy range.
- Research Organization:
- Joint Center for Radiation Therapy, Harvard Medical School, Boston, Massachusetts
- OSTI ID:
- 5337085
- Journal Information:
- Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 8:3; ISSN MPHYA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Laplace Transform pair model to determine bremsstrahlung spectra from attenuation data
Simulation studies of 4-MV x-ray spectral reconstruction by numerical analysis of transmission data
Estimated spectrum of a 4-MV therapeutic beam
Thesis/Dissertation
·
Sat Dec 31 23:00:00 EST 1983
·
OSTI ID:5793007
Simulation studies of 4-MV x-ray spectral reconstruction by numerical analysis of transmission data
Journal Article
·
Wed Sep 01 00:00:00 EDT 1982
· Med. Phys.; (United States)
·
OSTI ID:6688069
Estimated spectrum of a 4-MV therapeutic beam
Journal Article
·
Thu May 01 00:00:00 EDT 1986
· Med. Phys.; (United States)
·
OSTI ID:5133113