Depth Dose and Scatter Analysis of 10 MV X Rays

Khan, Faiz M.; Moore, Vaughn C.; Sato, So

doi:10.1148/102.1.165

Cited by 12 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…SAR can be differentiated with respect to field radius to yield differential scatter air ratios (dSAR) (Cunningham 1972, Larson and Prasad 1978, Sontag and Ray 1995. Analogous to SAR, scatter maximum ratios (SMR) (originally called scatter phantom ratios by Khan et al (1972)) are calculated by subtracting the zero-area TMR for that depth from the TMR at the same depth and beam radius. In both SAR and SMR the denominator is the primary dose at the depth of maximum build-up.…”

Section: R108mentioning

confidence: 99%

Dose calculations for external photon beams in radiotherapy

1999

View full text Add to dashboard Cite

Dose calculation methods for photon beams are reviewed in the context of radiation therapy treatment planning. Following introductory summaries on photon beam characteristics and clinical requirements on dose calculations, calculation methods are described in order of increasing explicitness of particle transport. The simplest are dose ratio factorizations limited to point dose estimates useful for checking other more general, but also more complex, approaches. Some methods incorporate detailed modelling of scatter dose through differentiation of measured data combined with various integration techniques. State-of-the-art methods based on point or pencil kernels, which are derived through Monte Carlo simulations, to characterize secondary particle transport are presented in some detail. Explicit particle transport methods, such as Monte Carlo, are briefly summarized. The extensive literature on beam characterization and handling of treatment head scatter is reviewed in the context of providing phase space data for kernel based and/or direct Monte Carlo dose calculations. Finally, a brief overview of inverse methods for optimization and dose reconstruction is provided.

show abstract

Section: R108mentioning

confidence: 99%

Dose calculations for external photon beams in radiotherapy

1999

View full text Add to dashboard Cite

show abstract

“…The reasons why we chose RT as the mainstay treatment for soft tissue metastasis by HCC are as follows: the first reason was that the percent depth dose of the electron beam will decay to nearly zero at a certain calculated depth and the deeper organs will receive little or no electron energy. On the other hand, the photon beam will not decay to zero even when the beam passes through the whole body at the irradiated field, and the deeper organs below the metastatic lesion will be damaged to some extent (31, 32). Electron beams do little or no harm to deeper tissues and can be effective in treating superficial metastatic soft tissue lesions.…”

Section: Discussionmentioning

confidence: 99%