Abstract
An analytical method for the calculation of ratios of mean restricted collision stopping powers (L/p)(g)m averaged over the charged particle spectra and the photon spectrum that is accurate to first order has been developed, and it has been explored whether a moderate change in the photon fluence spectrum with field size has an effect on the mean restricted collision stopping power ratio in high-Z materials. The results of this study indicate that for the case of a miniphantom, moderate changes in the photon fluence spectrum have only a weak effect on the ratios of mean restricted collision stopping powers.
Original language | English (US) |
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Pages (from-to) | 758-772 |
Number of pages | 15 |
Journal | Medical physics |
Volume | 25 |
Issue number | 5 |
DOIs | |
State | Published - May 1998 |
Externally published | Yes |
Keywords
- Calibration
- Charged particle spectra
- Collision stopping power
- Dosimetry
- Photon spectrum
ASJC Scopus subject areas
- Biophysics
- Radiology Nuclear Medicine and imaging